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Onyx Boox Tab X Review | 68 Data compared

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  • Avg. price in UK: ~£760
  • Avg. price in US: ~$880
  • Screen size: 13.3 inches
  • Battery life: 17.5 hours
  • Supported bookstore ecosystem: Android Open Ecosystem

Onyx Boox Tab X review. Compare 68 technical specifications and user reviews to see how it ranks among ereaders and if it is worth buying.

7.6

Overall score

What it is: An overall evaluation of the eReader's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best eReaders on the market.

Score components:

90.0%

7.7

Technical Score

10.0%

6.6

User score

Very good
7.7

Technical Score

What it is: An assessment of the eReader's technical performance, covering key areas such as display quality, reading features, battery life, format support, ecosystem, and design.

When it matters: When you want to compare eReaders based on technical performance and available features.

Score components:

25.0%

8.5

Display

22.0%

9.7

Reading

18.0%

5.9

Battery

14.0%

7.8

Hardware

12.0%

8.7

Connectivity

9.0%

2.3

Design

Very good
6.6

User score

What it is: A rating that combines user reviews and the total number of reviews received by the eReader.

When it matters: When you want to know how an eReader feels in daily reading and how reliable it is for screen comfort, battery life, and library management according to user feedback.

Score components:

70.0%

8.0

User reviews

30.0%

3.4

Popularity

User score:
United States
Amazon_logo.png
4.0
(54)
United Kingdom
amazon
4.1
(50)

(Reviews last updated: Apr 2026)

Good
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    Best prices in UK

    Best rankings

    ?

    Available: ranking among products currently available (including other versions of this product).
    All: ranking among all products in the database.

    Verdict

    The Onyx Boox Tab X is a flagship 13.3-inch E-Ink tablet featuring an A4-sized Mobius Carta 1250 display with a 2200 x 1650 resolution (207 PPI) and a dedicated GPU for enhanced refresh rates. It is powered by a Qualcomm octa-core processor, 6GB of LPDDR4X RAM, and 128GB of internal storage, all running on Android 11 with full Google Play Store access. Key pros include its expansive screen area ideal for full-size PDF viewing, low-latency handwriting with the included Pen 2 Pro stylus, and a massive 6,300mAh battery for extended use. However, notable cons include its high price point, the lack of expandable storage, and a bulky 560g frame that can be cumbersome for long reading sessions compared to smaller devices.

    Technical Specifications of eReader Onyx Boox Tab X

    Technical Score

    What it is: An assessment of the eReader's technical performance, covering key areas such as display quality, reading features, battery life, format support, ecosystem, and design.

    When it matters: When you want to compare eReaders based on technical performance and available features.

    Score components:

    25.0%

    8.5

    Display

    22.0%

    9.7

    Reading

    18.0%

    5.9

    Battery

    14.0%

    7.8

    Hardware

    12.0%

    8.7

    Connectivity

    9.0%

    2.3

    Design

    7.7
    Onyx Boox Tab X has a technical score of 7.67 points, which is higher than that of 73.8% of products in this category.
    User score

    What it is: A rating that combines user reviews and the total number of reviews received by the eReader.

    When it matters: When you want to know how an eReader feels in daily reading and how reliable it is for screen comfort, battery life, and library management according to user feedback.

    Score components:

    70.0%

    8.0

    User reviews

    30.0%

    3.4

    Popularity

    User score:
    United States
    Amazon_logo.png
    4.0
    (54)
    United Kingdom
    amazon
    4.1
    (50)

    (Reviews last updated: Apr 2026)

    6.6
    Onyx Boox Tab X has a user score of 6.61 points, which is lower than that of 87.7% of products in this category.
    Popularity
    What it is: An indicator based on the number of reviews received by the eReader.
    When it matters: When you prefer to choose an eReader reviewed and selected by many other buyers.
    3.4
    Onyx Boox Tab X has a popularity of 3.4 points, which is lower than 59% of smartphones.
    Ratio quality/price

    What it is: An indicator that combines the eReader's overall rating with its cost.

    When it matters: When you are looking for an eReader with a good balance between reading comfort, features, and price.

    Score components:

    60.0%

    7.6

    Overall score

    40.0%

    6.5

    Price

    7.2
    Onyx Boox Tab X has a quality-to-price ratio of 7.2 points, which is lower than 54.1% of smartphones.
    Brand name
    What it is: Identifies the company or ecosystem behind the device, which often shapes the store, software approach, and accessory support.
    When it matters: When you are choosing between Kindle, Kobo, Boox, PocketBook, or another ecosystem with different store access and software behavior.

    Importance: MEDIUM

    Onyx
    Screen size
    What it is: The diagonal measurement of the reading panel, usually given in inches.
    When it matters: When you are deciding between a small travel reader and a larger page that works better for PDFs, comics, or textbooks.

    Importance: HIGH

    Good value: >=7.8

    13.3 inches
    Onyx Boox Tab X has a screen size of 13.3 inches which is larger than 99.2% of eReaders on this spec and equal to 0.8% of eReaders.
    Screen resolution
    What it is: The total pixel grid shown on the panel, normally written as width by height.
    When it matters: When small fonts, diagrams, or dense page layouts need to stay readable without constant zooming.

    Importance: HIGH

    1650x2200 px
    Onyx Boox Tab X uses a screen resolution of 1650x2200 px, which is sharper than that of 93.4% of eReaders and the same as that of 0.8% of eReaders.
    Pixel density
    What it is: The number of pixels packed into each inch of the display, expressed in ppi.
    When it matters: When you want text edges to look cleaner and serif fonts to resemble print more closely.

    Importance: HIGH

    Good value: >=300

    207 ppi
    Onyx Boox Tab X has a pixel density of 207 ppi which is lower than 73% of eReaders on this spec and equal to 0.8% of eReaders.
    E-paper display
    What it is: Uses an electrophoretic panel designed to mimic paper rather than a conventional backlit phone or tablet screen.
    When it matters: When you read for long stretches and want lower glare and less screen-like fatigue than on LCD or OLED devices.

    Importance: LOW

    yes
    Onyx Boox Tab X uses an e-paper display. 97.6% of eReaders have an e-paper display.
    Show more
    Supported file types
    What it is: Lists which ebook, document, image, or audio formats the reader can open without conversion.
    When it matters: When your library comes from mixed sources instead of one locked bookstore.

    Importance: HIGH

    24
    Onyx Boox Tab X supports 24 file types which is more than 84% of eReaders on this spec and equal to 6% of eReaders.
    PDF reflow support
    What it is: Can rearrange PDF text into a more readable, screen-sized layout instead of forcing the original fixed page.
    When it matters: When you read A4 documents, articles, or manuals on a smaller eReader screen.

    Importance: HIGH

    yes
    Onyx Boox Tab X offers PDF reflow. 55.4% of eReaders support PDF reflow.
    Annotation support
    What it is: Allows highlighting, handwritten notes, typed comments, or markup directly inside supported files.
    When it matters: When you study, review academic papers, or want your notes to stay attached to the exact passage.

    Importance: HIGH

    yes
    Onyx Boox Tab X offers annotation support. 100% of eReaders offer annotation support.
    Dictionary
    What it is: Provides built-in word lookup while you read.
    When it matters: When you read in another language or want quick definitions without leaving the page.

    Importance: MEDIUM

    yes
    Onyx Boox Tab X includes a built-in dictionary. 99.2% of eReaders include a built-in dictionary.
    Text-to-speech
    What it is: Converts on-screen text into spoken audio using a synthetic voice.
    When it matters: When you want to keep following a book while resting your eyes, walking, or multitasking.

    Importance: MEDIUM

    yes
    Onyx Boox Tab X offers text-to-speech. 64.2% of eReaders include text-to-speech.
    Show more
    Battery life
    What it is: Estimates how long the device can keep running between charges under normal reading conditions.
    When it matters: When you travel, commute, or want to finish books for days without thinking about charging.

    Importance: HIGH

    Good value: >=30

    17.5 hours
    Onyx Boox Tab X offers 17.5 hours of battery life which is shorter than 75% of eReaders on this spec of eReaders.
    Battery capacity
    What it is: The amount of energy the battery can store, commonly expressed in mAh.
    When it matters: When you want a rough hardware indicator of how much power reserve the device has.

    Importance: MEDIUM

    Good value: >=2000

    6,300 mAh
    Onyx Boox Tab X has a battery capacity of 6300 mAh which is higher than 98.3% of eReaders on this spec and equal to 1.7% of eReaders.
    Charging time
    What it is: The approximate time needed to recharge the battery from low to full.
    When it matters: When you often top up shortly before leaving and need the reader ready again quickly.

    Importance: MEDIUM

    Good value: <=3

    3 hours
    Onyx Boox Tab X takes 3 hours to charge which is slower than 52.9% of eReaders on this spec and equal to 28.9% of eReaders.
    approximately 3 hours for a full charge, can be faster with lower wattage chargers
    Wireless charging
    What it is: Can recharge on a compatible charging pad without plugging in a cable.
    When it matters: When you prefer drop-and-charge convenience on a desk or bedside stand.

    Importance: LOW

    no
    Onyx Boox Tab X does not offer wireless charging. 7.3% of eReaders offer wireless charging.
    Internal storage
    What it is: The built-in space available for books, notes, audiobooks, apps, and downloaded documents.
    When it matters: When you keep large libraries offline or store a lot of PDFs and audio locally.

    Importance: HIGH

    Good value: >=32

    128 GB
    Onyx Boox Tab X offers 128 GB of internal storage which is more than 94.1% of eReaders on this spec and equal to 5.9% of eReaders.
    RAM capacity
    What it is: The amount of working memory used for page rendering, multitasking, and keeping content active in the background.
    When it matters: When you open heavy files, switch between books, or expect the interface to stay snappy.

    Importance: MEDIUM

    Good value: >=2

    6 GB
    Onyx Boox Tab X offers 6 GB of RAM which is more than 97.5% of eReaders on this spec and equal to 2.5% of eReaders.
    CPU base clock speed
    What it is: The baseline operating frequency of the main processor under normal load.
    When it matters: When you compare readers for faster menu navigation, indexing, and handling of larger documents.

    Importance: MEDIUM

    8 x 2 GHz
    Onyx Boox Tab X has a CPU base clock speed of 8 x 2 GHz, which is faster than that of 82.6% of eReaders and the same as that of 12.4% of eReaders.
    Operating system
    What it is: The software platform that drives the interface, reading apps, and deeper system capabilities.
    When it matters: When you care about app availability, customization, and how flexible the device can become beyond basic reading.

    Importance: HIGH

    Android 11
    Onyx Boox Tab X runs Android 11, which is more advanced than that of 76.2% of eReaders and the same as that of 17.2% of eReaders.
    Android 11
    Memory card slot
    What it is: Accepts removable storage so the library can expand beyond the built-in capacity.
    When it matters: When your collection will outgrow internal storage or you move files between devices manually.

    Importance: MEDIUM

    no
    Onyx Boox Tab X does not have a memory card slot. 43.1% of eReaders have a memory card slot.
    Show more
    Wi-Fi connectivity
    What it is: Connects the reader to wireless networks for book downloads, syncing, updates, and online services.
    When it matters: When you buy books directly on the device or keep your library synced without using a cable.

    Importance: HIGH

    yes
    Onyx Boox Tab X connects over Wi-Fi. 93.5% of eReaders have Wi-Fi.
    Wi-Fi version
    What it is: Specifies which wireless networking standard is supported, such as Wi-Fi 4, 5, or 6.
    When it matters: When router compatibility, wireless stability, or faster transfers on newer home networks matter to you.

    Importance: LOW

    Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
    Onyx Boox Tab X supports Wi-Fi Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n), which is newer than that of 58.2% of eReaders and the same as that of 40.2% of eReaders.
    Wi-Fi bands supported
    What it is: Shows whether the reader can use 2.4 GHz, 5 GHz, or both wireless bands.
    When it matters: When crowded apartment Wi-Fi or 5 GHz-only setups make band support matter at home or in the office.

    Importance: LOW

    2.4 GHz+5 GHz
    Onyx Boox Tab X supports 2.4 GHz+5 GHz Wi-Fi bands, which is broader than that of 57.4% of eReaders and the same as that of 42.6% of eReaders.
    Bluetooth
    What it is: Provides short-range wireless pairing for headphones, speakers, keyboards, page turners, or other accessories.
    When it matters: When you listen to audiobooks, use a remote page turner, or want cable-free accessories around the house.

    Importance: MEDIUM

    yes
    Onyx Boox Tab X connects over Bluetooth. 60.2% of eReaders have Bluetooth.
    Bluetooth version
    What it is: Identifies the supported Bluetooth generation, which affects efficiency, codec support, and compatibility.
    When it matters: When you pair newer headphones and want a more stable, lower-power wireless connection.

    Importance: LOW

    Good value: >=5.0

    5.0
    Onyx Boox Tab X supports Bluetooth 5.0 which is newer than 58.5% of eReaders on this spec and equal to 28.8% of eReaders.
    Show more
    Weight
    What it is: The mass of the device, usually measured in grams.
    When it matters: When one-handed comfort matters and you do not want the reader to feel tiring during long sessions.

    Importance: HIGH

    Good value: <=200

    560 g
    Onyx Boox Tab X weighs 560 g which is heavier than 96.7% of eReaders on this spec of eReaders.
    Thickness
    What it is: The depth of the body from front to back, usually measured in millimetres.
    When it matters: When grip comfort, sleeve fit, or how slim the reader feels in the hand matters to you.

    Importance: MEDIUM

    Good value: <=8

    6.8 mm
    Onyx Boox Tab X is 6.8 mm thick which is thinner than 80% of eReaders on this spec and equal to 1.7% of eReaders.
    Height
    What it is: The vertical size of the body, usually measured from top to bottom in millimetres.
    When it matters: When you are checking whether the reader will fit a bag, jacket pocket, or small stand.

    Importance: LOW

    Good value: <=160

    310 mm
    Onyx Boox Tab X is 310 mm tall which is taller than 99.2% of eReaders on this spec and equal to 0.8% of eReaders.
    Width
    What it is: The side-to-side body measurement, usually given in millimetres.
    When it matters: When one-handed reach and how much space the reader takes in a bag or bedside setup matter.

    Importance: LOW

    Good value: <=130

    228 mm
    Onyx Boox Tab X is 228 mm wide which is wider than 98.4% of eReaders on this spec and equal to 0.8% of eReaders.
    Water resistance (splashproof)
    What it is: Can tolerate light splashes, damp hands, or brief accidental contact with water.
    When it matters: When you read by the bath, at the pool, or outdoors where light moisture is realistic.

    Importance: MEDIUM

    no
    Onyx Boox Tab X does not have water resistance against splashes. 25% of eReaders have water resistance against splashes.
    Show more

    Onyx Boox Tab X vs the average eReader

    • 6.3 inches larger screen size
      Onyx Boox Tab X has a larger screen than the average eReader (13.3 inches vs 7 inches). The average eReader screen size is 7 inches.
      What it is: The diagonal measurement of the reading panel, usually given in inches.
      When it matters: When you are deciding between a small travel reader and a larger page that works better for PDFs, comics, or textbooks.

      Importance: HIGH

      Good value: >=7.8

      Onyx Boox Tab X has a larger screen than the average eReader (13.3 inches vs 7 inches). The average eReader screen size is 7 inches.13.3 inches vs 7 inches
    • 4.12x larger battery capacity
      Onyx Boox Tab X has a larger battery than the average eReader (6,300 mAh vs 1,530 mAh). The average eReader battery has a capacity of 1,530 mAh.
      What it is: The amount of energy the battery can store, commonly expressed in mAh.
      When it matters: When you want a rough hardware indicator of how much power reserve the device has.

      Importance: MEDIUM

      Good value: >=2000

      Onyx Boox Tab X has a larger battery than the average eReader (6,300 mAh vs 1,530 mAh). The average eReader battery has a capacity of 1,530 mAh.6,300 mAh vs 1,530 mAh
    • 8x more storage
      Onyx Boox Tab X offers more internal storage than the average eReader (128 GB vs 16 GB). The average eReader provides 16 GB of internal storage.
      What it is: The built-in space available for books, notes, audiobooks, apps, and downloaded documents.
      When it matters: When you keep large libraries offline or store a lot of PDFs and audio locally.

      Importance: HIGH

      Good value: >=32

      Onyx Boox Tab X offers more internal storage than the average eReader (128 GB vs 16 GB). The average eReader provides 16 GB of internal storage.128 GB vs 16 GB
    • 9 broader file support
      Onyx Boox Tab X supports a broader range of file types than the average eReader (24 vs 15).
      What it is: Lists which ebook, document, image, or audio formats the reader can open without conversion.
      When it matters: When your library comes from mixed sources instead of one locked bookstore.

      Importance: HIGH

      Onyx Boox Tab X supports a broader range of file types than the average eReader (24 vs 15).24 vs 15
    • 5.49 GB more RAM
      Onyx Boox Tab X has more RAM than the average eReader (6 GB vs 0.512 GB). The average eReader has 0.512 GB of RAM.
      What it is: The amount of working memory used for page rendering, multitasking, and keeping content active in the background.
      When it matters: When you open heavy files, switch between books, or expect the interface to stay snappy.

      Importance: MEDIUM

      Good value: >=2

      Onyx Boox Tab X has more RAM than the average eReader (6 GB vs 0.512 GB). The average eReader has 0.512 GB of RAM.6 GB vs 0.512 GB
    • Higher screen resolution
      Onyx Boox Tab X supports higher screen resolution than the average eReader (1650x2200 px vs 1072x1448 px). The average eReader supports 1072x1448 px screen resolution.
      What it is: The total pixel grid shown on the panel, normally written as width by height.
      When it matters: When small fonts, diagrams, or dense page layouts need to stay readable without constant zooming.

      Importance: HIGH

      Onyx Boox Tab X supports higher screen resolution than the average eReader (1650x2200 px vs 1072x1448 px). The average eReader supports 1072x1448 px screen resolution.1650x2200 px vs 1072x1448 px
    • Supports handwriting recognition
      Onyx Boox Tab X supports handwriting recognition, while the average eReader does not.
      Built-in handwriting-to-text support.
      What it is: Can convert handwritten pen input into editable digital text.
      When it matters: When you write notes by hand and want them searchable, cleaner, or easier to export later.

      Importance: MEDIUM

      Onyx Boox Tab X supports handwriting recognition, while the average eReader does not.
    • Faster CPU base clock speed
      Onyx Boox Tab X has a faster CPU base clock speed than the average eReader (8x2 GHz vs 1x1 GHz). The average eReader has a CPU base clock speed of 1x1 GHz.
      What it is: The baseline operating frequency of the main processor under normal load.
      When it matters: When you compare readers for faster menu navigation, indexing, and handling of larger documents.

      Importance: MEDIUM

      Onyx Boox Tab X has a faster CPU base clock speed than the average eReader (8x2 GHz vs 1x1 GHz). The average eReader has a CPU base clock speed of 1x1 GHz.8x2 GHz vs 1x1 GHz
    • 6.3 inches larger screen size
      Onyx Boox Tab X has a larger screen than the average eReader (13.3 inches vs 7 inches). The average eReader screen size is 7 inches.
    • Higher screen resolution
      Onyx Boox Tab X supports higher screen resolution than the average eReader (1650x2200 px vs 1072x1448 px). The average eReader supports 1072x1448 px screen resolution.
    • More advanced E-Ink technology
      Onyx Boox Tab X uses Carta 1,250 E-Ink technology, while the average eReader uses Carta Plus.
    • Supports auto-rotate
      Onyx Boox Tab X supports auto-rotate, while the average eReader does not.
    • 9 broader file support
      Onyx Boox Tab X supports a broader range of file types than the average eReader (24 vs 15).
    • Supports handwriting recognition
      Onyx Boox Tab X supports handwriting recognition, while the average eReader does not.
    • Supports stylus
      Onyx Boox Tab X supports a stylus, while the average eReader does not.
    • Broader library support
      Onyx Boox Tab X supports more library lending platforms than the average eReader (OverDrive, Libby, Hoopla, BorrowBox, cloudLibrary vs OverDrive, Libby).
    • Includes stylus
      Onyx Boox Tab X includes a stylus, while the average eReader does not.
    • 4.12x larger battery capacity
      Onyx Boox Tab X has a larger battery than the average eReader (6,300 mAh vs 1,530 mAh). The average eReader battery has a capacity of 1,530 mAh.
    • 8x more storage
      Onyx Boox Tab X offers more internal storage than the average eReader (128 GB vs 16 GB). The average eReader provides 16 GB of internal storage.
    • 5.49 GB more RAM
      Onyx Boox Tab X has more RAM than the average eReader (6 GB vs 0.512 GB). The average eReader has 0.512 GB of RAM.
    • Faster CPU base clock speed
      Onyx Boox Tab X has a faster CPU base clock speed than the average eReader (8x2 GHz vs 1x1 GHz). The average eReader has a CPU base clock speed of 1x1 GHz.
    • More advanced operating system
      Onyx Boox Tab X uses Android 11, a more advanced operating system than Kindle OS on the average eReader.
    • Has accelerometer
      Onyx Boox Tab X has an accelerometer, while the average eReader does not.
    • Has microphone
      Onyx Boox Tab X has a microphone, while the average eReader does not.
    • Supports USB OTG
      Onyx Boox Tab X supports USB OTG, while the average eReader does not.
    • 2 more speakers
      Onyx Boox Tab X has more speakers than the average eReader (2 vs 0). The average eReader has 0 speakers.
    • Better Wi-Fi bands
      Onyx Boox Tab X supports 2.4 GHz+5 GHz Wi-Fi bands, while the average eReader supports 2.4 GHz.
    • 1.3 mm thinner
      Onyx Boox Tab X is thinner than the average eReader (6.8 mm vs 8.1 mm). The average eReader thickness is 8.1 mm.
    • 2 year/s newer release date
      Onyx Boox Tab X is newer than the average eReader (2023 vs 2021). The average eReader was released in 2021.

    Total
    Display
    Reading
    Battery
    Hardware
    Connectivity
    Design
    • 21.9% lower pixel density
      Onyx Boox Tab X has a lower pixel density than the average eReader (207 ppi vs 265 ppi). The average eReader has a pixel density of 265 ppi.
    • Limited DRM support
      Onyx Boox Tab X supports fewer DRM schemes than the average eReader (Adobe DRM vs Adobe DRM, Readium LCP).
      Relies on third-party Android apps for DRM-protected content.
    • 1 hours longer charging time
      Onyx Boox Tab X charges more slowly than the average eReader (3 hours vs 2 hours). The average eReader charges in 2 hours.
      approximately 3 hours for a full charge, can be faster with lower wattage chargers
    • 3.5 hours shorter battery life
      Onyx Boox Tab X offers shorter battery life than the average eReader (17.5 hours vs 21 hours). The average eReader offers 21 hours of battery life.
    • Older Bluetooth version
      Onyx Boox Tab X supports an older Bluetooth version than the average eReader (5 vs 5.1).
    • 2.63x heavier
      Onyx Boox Tab X is heavier than the average eReader (560 g vs 213 g). The average eReader weighs 213 g.
    • 100.4 mm wider
      Onyx Boox Tab X is wider than the average eReader (228 mm vs 127.6 mm). The average eReader width is 127.6 mm.
    • 137 mm taller
      Onyx Boox Tab X is taller than the average eReader (310 mm vs 173 mm). The average eReader height is 173 mm.
    • Limited DRM support
      Onyx Boox Tab X supports fewer DRM schemes than the average eReader (Adobe DRM vs Adobe DRM, Readium LCP).
      Relies on third-party Android apps for DRM-protected content.
      What it is: Shows which copy-protection systems the device can open, such as Adobe DRM or store-specific protection.
      When it matters: When you buy or borrow books from multiple stores and need them all to open on one reader.

      Importance: HIGH

      Onyx Boox Tab X supports fewer DRM schemes than the average eReader (Adobe DRM vs Adobe DRM, Readium LCP).Adobe DRM vs Adobe DRM, Readium LCP
    • 2.63x heavier
      Onyx Boox Tab X is heavier than the average eReader (560 g vs 213 g). The average eReader weighs 213 g.
      What it is: The mass of the device, usually measured in grams.
      When it matters: When one-handed comfort matters and you do not want the reader to feel tiring during long sessions.

      Importance: HIGH

      Good value: <=200

      Onyx Boox Tab X is heavier than the average eReader (560 g vs 213 g). The average eReader weighs 213 g.560 g vs 213 g
    • 1 hours longer charging time
      Onyx Boox Tab X charges more slowly than the average eReader (3 hours vs 2 hours). The average eReader charges in 2 hours.
      approximately 3 hours for a full charge, can be faster with lower wattage chargers
      What it is: The approximate time needed to recharge the battery from low to full.
      When it matters: When you often top up shortly before leaving and need the reader ready again quickly.

      Importance: MEDIUM

      Good value: <=3

      Onyx Boox Tab X charges more slowly than the average eReader (3 hours vs 2 hours). The average eReader charges in 2 hours.3 hours vs 2 hours
    • 21.9% lower pixel density
      Onyx Boox Tab X has a lower pixel density than the average eReader (207 ppi vs 265 ppi). The average eReader has a pixel density of 265 ppi.
      What it is: The number of pixels packed into each inch of the display, expressed in ppi.
      When it matters: When you want text edges to look cleaner and serif fonts to resemble print more closely.

      Importance: HIGH

      Good value: >=300

      Onyx Boox Tab X has a lower pixel density than the average eReader (207 ppi vs 265 ppi). The average eReader has a pixel density of 265 ppi.207 ppi vs 265 ppi
    • 3.5 hours shorter battery life
      Onyx Boox Tab X offers shorter battery life than the average eReader (17.5 hours vs 21 hours). The average eReader offers 21 hours of battery life.
      What it is: Estimates how long the device can keep running between charges under normal reading conditions.
      When it matters: When you travel, commute, or want to finish books for days without thinking about charging.

      Importance: HIGH

      Good value: >=30

      Onyx Boox Tab X offers shorter battery life than the average eReader (17.5 hours vs 21 hours). The average eReader offers 21 hours of battery life.17.5 hours vs 21 hours
    • 100.4 mm wider
      Onyx Boox Tab X is wider than the average eReader (228 mm vs 127.6 mm). The average eReader width is 127.6 mm.
      What it is: The side-to-side body measurement, usually given in millimetres.
      When it matters: When one-handed reach and how much space the reader takes in a bag or bedside setup matter.

      Importance: LOW

      Good value: <=130

      Onyx Boox Tab X is wider than the average eReader (228 mm vs 127.6 mm). The average eReader width is 127.6 mm.228 mm vs 127.6 mm
    • 137 mm taller
      Onyx Boox Tab X is taller than the average eReader (310 mm vs 173 mm). The average eReader height is 173 mm.
      What it is: The vertical size of the body, usually measured from top to bottom in millimetres.
      When it matters: When you are checking whether the reader will fit a bag, jacket pocket, or small stand.

      Importance: LOW

      Good value: <=160

      Onyx Boox Tab X is taller than the average eReader (310 mm vs 173 mm). The average eReader height is 173 mm.310 mm vs 173 mm
    • 4.47x more expensive
      Onyx Boox Tab X is more expensive than the average eReader (£760 vs £170).
      Onyx Boox Tab X is more expensive than the average eReader (£760 vs £170).£760 vs £170
    Total
    Overall
    Display
    Reading
    Battery
    Connectivity
    Design

    Graphic comparison of Onyx Boox Tab X and other eReaders

    Attribute category
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    No results found

    Third-party reviews

    United States
    Amazon_logo.png
    4.0
    54 Reviews
    United Kingdom
    amazon
    4.1
    50 Reviews

    (Reviews last updated: Apr 2026)

    What customers like about Onyx Boox Tab X?

    • Massive 13.3-inch A4-sized screen is ideal for full-scale PDF reading and annotation without zooming
    • Dedicated GPU and 'Super Refresh' technology provide exceptionally smooth performance and fast refresh rates for an e-ink device
    • Open Android 11 system with full Google Play Store access allows for high flexibility with third-party apps
    • Excellent build quality with a premium magnesium-alloy back and a durable, flexible Mobius plastic screen
    • Large 6,300mAh battery provides significant longevity, often lasting weeks on a single charge for standard reading tasks
    • Split-screen mode takes full advantage of the large display for multitasking between documents and notes

    What customers dislike about Onyx Boox Tab X?

    • Extremely high price point (approx. $880/£880) makes it a niche luxury compared to standard tablets like the iPad
    • The 13.3-inch footprint is bulky and can be unwieldy or heavy for casual handheld reading in bed or on a couch
    • Lacks a fingerprint sensor and a dedicated SD card slot for storage expansion
    • No integrated magnetic attachment or silo for the stylus, making the pen easy to misplace without a specialized case
    • Screen resolution (207 PPI) is lower than 10-inch competitors (300 PPI), which can lead to slightly less sharp text
    • Ghosting (lingering images from previous pages) remains a prevalent issue during drawing and high-speed scrolling

    Expert reviews

    E
    ewritable.net
    29/11/2024
    Boox Tab X Review - eWritable Are you looking for specific performance benchmarks or battery life comparisons against other 13.3-inch models like the...

    a little longer The Onyx BOOX Tab X is a premium 13.3-inch E-ink tablet designed for heavy PDF annotation, featuring a large A4-sized Mobius Carta 1250 screen and a magnesium-aluminum alloy build. A primary advantage is the "Super Refresh" (BSR) technology and dedicated GPU, which deliver a highly responsive experience with minimal ghosting. Conversely, a major drawback is the lower...Read more

    S
    stuff.tv
    22/04/2024
    Onyx Boox Tab X review: excellent for sketching out ideas | Stuff

    The Onyx Boox Tab X is a specialized 13.3-inch E-Ink tablet designed for professional, A4-sized digital note-taking and document annotation. Pros include high-quality magnesium alloy construction, a responsive Pen2 Pro stylus, and "Super Refresh" technology, which allows for adjustable display modes to manage ghosting. Conversely, cons center on the high price point and a bulky...Read more

    T
    trustedreviews.com
    21/06/2023
    Onyx Boox Tab X Review

    The Onyx Boox Tab X is a premium 13.3-inch E-ink tablet designed for document productivity, featuring a durable, slim design and a massive A4-sized screen ideal for viewing large PDFs without zooming. It offers superior performance for an E-ink device, utilizing a dedicated GPU and Android 11 to allow for smooth app usage and a highly responsive stylus for note-taking. However, the...Read more

    T
    techradar.com
    14/04/2023
    Onyx Boox Tab X review: sometimes size does matter when it comes to E Ink tablets

    The Onyx Boox Tab X is a 13.3-inch E Ink tablet designed for professionals, offering a large, A4-sized screen ideal for viewing and annotating PDFs without scrolling. Powered by Android 11 with 6GB of RAM and a Qualcomm chipset, it supports third-party apps from the Google Play Store and provides a highly responsive writing experience with the included Pen 2 stylus. Key advantages...Read more

    M
    musiker-board.de
    29/12/2024
    A short review of the Onyx Boox Tab X with MobileSheets Pro for e-ink

    A Musiker-Board review highlights the 13.3-inch Onyx Boox Tab X as an ideal, A4-sized E-Ink device for musicians using MobileSheets Pro, providing a "true-to-scale" experience that eliminates the need for zooming. Performance pros include "BSR" technology for fast page turns, excellent readability in direct sunlight, and long battery life for rehearsals. Cons include a high price, a...Read more

    (Translated)Show original
    N
    notebookcheck.biz
    08/02/2024
    Onyx Boox Tab X Review: An E-Ink Tablet for Important Tasks?

    The Onyx Boox Tab X is a premium 13.3-inch E-Ink tablet designed for professional productivity, featuring a large Carta 1250 display (2200 x 1650, 207 PPI) that allows for comfortable A4 document reading and PDF annotation. Driven by a Qualcomm processor and a dedicated GPU for "Super Refresh" technology, it offers superior performance compared to traditional e-readers, acting more...Read more

    (Translated)Show original
    J
    journaldugeek.com
    02/10/2025
    Onyx Boox Tab XC Review: Size Really Does Matter

    The Onyx Boox Tab XC features a massive 13.3-inch Kaleido 3 color E Ink display (300 PPI B&W/150 PPI color) and BSR technology for exceptionally smooth performance. Its "A4" size serves as a significant professional tool for reading and annotating documents without scrolling, complemented by Android 13, app accessibility, and a responsive stylus for note-taking. However, the device...Read more

    (Translated)Show original
    D
    dday.it
    27 Agosto 2025
    Boox Tab X C review: The A4-sized color e-ink tablet

    The Onyx Boox Tab X C is a 13.3-inch color e-ink tablet featuring a Kaleido 3 display (300 PPI B&W) and Android 13, excelling at viewing large-format PDFs and color documents. Pros include the expansive screen, premium build, and robust app support, making it a powerful tool for professional, non-LCD productivity. However, the 625g weight makes it less suitable for casual, handheld...Read more

    (Translated)Show original
    D
    digitec.ch
    01/07/2024
    Onyx Boox Go 10.3 eReader Review

    The Onyx Boox Go 10.3 is a 4.6mm thick, 10.3-inch e-reader featuring a 300 ppi E Ink Carta 1200 screen, optimized for reading manga and digital note-taking with a low-latency stylus. Its premium design includes an aluminum build and textured back, while the Android 12 operating system allows for flexible app installation via the Google Play Store. Key limitations highlighted in the...Read more

    (Translated)Show original
    N
    notebookcheck.nl
    8 februari 2024
    Onyx Boox Tab X review - E-Ink tablet for big tasks?

    The Onyx Boox Tab X is a premium 13.3-inch E-Ink tablet designed for intensive A4-sized PDF annotation and note-taking, featuring a Mobius flexible Carta 1250 display with reduced latency and an octa-core processor. Pros include the expansive screen, which enables side-by-side document viewing, and Super Refresh Technology that ensures low-latency performance alongside a large 6300...Read more

    (Translated)Show original

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