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Onyx Boox Note 4 Review | 68 Data compared

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  • Avg. price in UK: ~£480
  • Avg. price in US: ~$500
  • Screen size: 10.3 inches
  • Battery life: ?
  • Supported bookstore ecosystem: Android Open Ecosystem

Onyx Boox Note 4 review. Compare 68 technical specifications and user reviews to see how it ranks among ereaders and if it is worth buying.

8.4

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%

8.4

Technical Score

10.0%

?

User score

Excellent
8.4

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%

8.8

Display

22.0%

9.8

Reading

18.0%

9.1

Battery

14.0%

7.2

Hardware

12.0%

8.7

Connectivity

9.0%

3.6

Design

Excellent
?

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%

?

User reviews

30.0%

?

Popularity

    • No image
    No image

    Best prices in UK

      N/A~ £480

    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 Note Air4 C is a versatile 10.3-inch e-ink tablet featuring a Kaleido 3 color display that delivers 300 PPI for monochrome content and 150 PPI for 4,096 colors. Driven by a 2.8GHz octa-core processor and 6GB of LPDDR4X RAM, the device runs on Android 13 with full Google Play Store access, supported by 64GB of internal storage and a microSD slot expandable up to 2TB. Main pros include its smooth performance aided by BSR (Boox Super Refresh) technology, a premium aluminum-magnesium build with a built-in fingerprint sensor, and a highly customizable note-taking experience with an included 4,096-level pressure-sensitive stylus. However, notable cons include muted color vibrancy compared to LCD screens, weak dual speakers, and a significant battery drain when using high-refresh modes or color content compared to monochrome e-readers.

    Technical Specifications of eReader Onyx Boox Note 4

    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%

    ?

    Display

    22.0%

    ?

    Reading

    18.0%

    ?

    Battery

    14.0%

    ?

    Hardware

    12.0%

    ?

    Connectivity

    9.0%

    ?

    Design

    8.4
    Onyx Boox Note 4 has a technical score of 8.37 points, which is higher than that of 95.1% 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%

    0.0

    User reviews

    30.0%

    1.0

    Popularity

    ?
    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.
    1.0
    Onyx Boox Note 4 has a popularity of 1 points, which is lower than 70.5% 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%

    8.4

    Overall score

    40.0%

    8.0

    Price

    8.3
    Onyx Boox Note 4 has a quality-to-price ratio of 8.3 points, which is higher than 88.5% 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

    10.3 inches
    Onyx Boox Note 4 has a screen size of 10.3 inches which is larger than 86.9% of eReaders on this spec and equal to 11.5% 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

    1404x1872 px
    Onyx Boox Note 4 uses a screen resolution of 1404x1872 px, which is sharper than that of 73.8% of eReaders and the same as that of 17.2% 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

    227 ppi
    Onyx Boox Note 4 has a pixel density of 227 ppi which is lower than 51.6% of eReaders on this spec and equal to 7.4% 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 Note 4 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

    21
    Onyx Boox Note 4 supports 21 file types which is more than 77% of eReaders on this spec and equal to 3% 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 Note 4 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 Note 4 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 Note 4 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 Note 4 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

    ?
    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

    3,700 mAh
    Onyx Boox Note 4 has a battery capacity of 3700 mAh which is higher than 87.5% of eReaders on this spec and equal to 4.2% 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

    ?
    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 Note 4 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

    64 GB
    Onyx Boox Note 4 offers 64 GB of internal storage which is more than 82.2% of eReaders on this spec and equal to 11% 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

    4 GB
    Onyx Boox Note 4 offers 4 GB of RAM which is more than 86.6% of eReaders on this spec and equal to 10.1% 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 Note 4 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 Note 4 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 Note 4 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 Note 4 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 Note 4 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 Note 4 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 Note 4 connects over Bluetooth. 60.2% of eReaders have Bluetooth.
    Bluetooth can pair wireless accessories.
    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 Note 4 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

    385 g
    Onyx Boox Note 4 weighs 385 g which is heavier than 79.5% of eReaders on this spec and equal to 0.8% 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

    5.8 mm
    Onyx Boox Note 4 is 5.8 mm thick which is thinner than 91.7% of eReaders on this spec and equal to 5.8% 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

    249 mm
    Onyx Boox Note 4 is 249 mm tall which is taller than 91% of eReaders on this spec and equal to 1.6% 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

    176.5 mm
    Onyx Boox Note 4 is 176.5 mm wide which is wider than 78.7% 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 Note 4 does not have water resistance against splashes. 25% of eReaders have water resistance against splashes.
    Show more

    Onyx Boox Note 4 vs the average eReader

    • 3.3 inches larger screen size
      Onyx Boox Note 4 has a larger screen than the average eReader (10.3 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 Note 4 has a larger screen than the average eReader (10.3 inches vs 7 inches). The average eReader screen size is 7 inches.10.3 inches vs 7 inches
    • 2.42x larger battery capacity
      Onyx Boox Note 4 has a larger battery than the average eReader (3,700 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 Note 4 has a larger battery than the average eReader (3,700 mAh vs 1,530 mAh). The average eReader battery has a capacity of 1,530 mAh.3,700 mAh vs 1,530 mAh
    • 4x more storage
      Onyx Boox Note 4 offers more internal storage than the average eReader (64 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 Note 4 offers more internal storage than the average eReader (64 GB vs 16 GB). The average eReader provides 16 GB of internal storage.64 GB vs 16 GB
    • Supports handwriting recognition
      Onyx Boox Note 4 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 Note 4 supports handwriting recognition, while the average eReader does not.
    • 3.49 GB more RAM
      Onyx Boox Note 4 has more RAM than the average eReader (4 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 Note 4 has more RAM than the average eReader (4 GB vs 0.512 GB). The average eReader has 0.512 GB of RAM.4 GB vs 0.512 GB
    • 6 broader file support
      Onyx Boox Note 4 supports a broader range of file types than the average eReader (21 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 Note 4 supports a broader range of file types than the average eReader (21 vs 15).21 vs 15
    • Faster CPU base clock speed
      Onyx Boox Note 4 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 Note 4 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
    • Supports stylus
      Onyx Boox Note 4 supports a stylus, while the average eReader does not.
      uses Wacom EMR technology, compatible with BOOX styluses that support handwriting
      What it is: Works with a pen for handwriting, sketching, selection, or precise markup.
      When it matters: When you annotate PDFs, write in margins, or use the reader partly as a digital notebook.

      Importance: MEDIUM

      Onyx Boox Note 4 supports a stylus, while the average eReader does not.
    • 3.3 inches larger screen size
      Onyx Boox Note 4 has a larger screen than the average eReader (10.3 inches vs 7 inches). The average eReader screen size is 7 inches.
    • Higher screen resolution
      Onyx Boox Note 4 supports higher screen resolution than the average eReader (1404x1872 px vs 1072x1448 px). The average eReader supports 1072x1448 px screen resolution.
    • Has auto-brightness sensor
      Onyx Boox Note 4 has an auto-brightness sensor, while the average eReader does not.
    • Supports auto-rotate
      Onyx Boox Note 4 supports auto-rotate, while the average eReader does not.
    • Supports handwriting recognition
      Onyx Boox Note 4 supports handwriting recognition, while the average eReader does not.
    • 6 broader file support
      Onyx Boox Note 4 supports a broader range of file types than the average eReader (21 vs 15).
    • Supports stylus
      Onyx Boox Note 4 supports a stylus, while the average eReader does not.
    • Broader library support
      Onyx Boox Note 4 supports more library lending platforms than the average eReader (OverDrive, Libby, Hoopla, BorrowBox, cloudLibrary, PrêtNumérique vs OverDrive, Libby).
    • Includes stylus
      Onyx Boox Note 4 includes a stylus, while the average eReader does not.
    • 2.42x larger battery capacity
      Onyx Boox Note 4 has a larger battery than the average eReader (3,700 mAh vs 1,530 mAh). The average eReader battery has a capacity of 1,530 mAh.
    • 4x more storage
      Onyx Boox Note 4 offers more internal storage than the average eReader (64 GB vs 16 GB). The average eReader provides 16 GB of internal storage.
    • 3.49 GB more RAM
      Onyx Boox Note 4 has more RAM than the average eReader (4 GB vs 0.512 GB). The average eReader has 0.512 GB of RAM.
    • Faster CPU base clock speed
      Onyx Boox Note 4 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 Note 4 uses Android 11, a more advanced operating system than Kindle OS on the average eReader.
    • Has fingerprint scanner
      Onyx Boox Note 4 has a fingerprint scanner, while the average eReader does not.
    • Has microphone
      Onyx Boox Note 4 has a microphone, while the average eReader does not.
    • Supports USB OTG
      Onyx Boox Note 4 supports USB OTG, while the average eReader does not.
    • 2 more speakers
      Onyx Boox Note 4 has more speakers than the average eReader (2 vs 0). The average eReader has 0 speakers.
    • Better Wi-Fi bands
      Onyx Boox Note 4 supports 2.4 GHz+5 GHz Wi-Fi bands, while the average eReader supports 2.4 GHz.
    • 2.3 mm thinner
      Onyx Boox Note 4 is thinner than the average eReader (5.8 mm vs 8.1 mm). The average eReader thickness is 8.1 mm.

    Total
    Overall
    Display
    Reading
    Battery
    Hardware
    Connectivity
    Design
    • Less advanced E-Ink technology
      Onyx Boox Note 4 uses Carta E-Ink technology, while the average eReader uses Carta Plus.
    • 14.3% lower pixel density
      Onyx Boox Note 4 has a lower pixel density than the average eReader (227 ppi vs 265 ppi). The average eReader has a pixel density of 265 ppi.
    • Older Bluetooth version
      Onyx Boox Note 4 supports an older Bluetooth version than the average eReader (5 vs 5.1).
    • 80.8% heavier
      Onyx Boox Note 4 is heavier than the average eReader (385 g vs 213 g). The average eReader weighs 213 g.
    • 76 mm taller
      Onyx Boox Note 4 is taller than the average eReader (249 mm vs 173 mm). The average eReader height is 173 mm.
    • 48.9 mm wider
      Onyx Boox Note 4 is wider than the average eReader (176.5 mm vs 127.6 mm). The average eReader width is 127.6 mm.
    • Less advanced E-Ink technology
      Onyx Boox Note 4 uses Carta E-Ink technology, while the average eReader uses Carta Plus.
      What it is: States which E Ink generation or panel family the device uses, such as Carta or Kaleido.
      When it matters: When you compare newer and older readers for contrast, refresh behavior, or color performance.

      Importance: HIGH

      Onyx Boox Note 4 uses Carta E-Ink technology, while the average eReader uses Carta Plus.Carta vs Carta Plus
    • 80.8% heavier
      Onyx Boox Note 4 is heavier than the average eReader (385 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 Note 4 is heavier than the average eReader (385 g vs 213 g). The average eReader weighs 213 g.385 g vs 213 g
    • 76 mm taller
      Onyx Boox Note 4 is taller than the average eReader (249 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 Note 4 is taller than the average eReader (249 mm vs 173 mm). The average eReader height is 173 mm.249 mm vs 173 mm
    • 14.3% lower pixel density
      Onyx Boox Note 4 has a lower pixel density than the average eReader (227 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 Note 4 has a lower pixel density than the average eReader (227 ppi vs 265 ppi). The average eReader has a pixel density of 265 ppi.227 ppi vs 265 ppi
    • 48.9 mm wider
      Onyx Boox Note 4 is wider than the average eReader (176.5 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 Note 4 is wider than the average eReader (176.5 mm vs 127.6 mm). The average eReader width is 127.6 mm.176.5 mm vs 127.6 mm
    • 2.82x more expensive
      Onyx Boox Note 4 is more expensive than the average eReader (£480 vs £170).
      Onyx Boox Note 4 is more expensive than the average eReader (£480 vs £170).£480 vs £170
    • 5.06x less popular
      Onyx Boox Note 4 is less popular than the average eReader (1.00 vs 5,062).
      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.
      Onyx Boox Note 4 is less popular than the average eReader (1.00 vs 5,062).1 vs 5.06
    • Older Bluetooth version
      Onyx Boox Note 4 supports an older Bluetooth version than the average eReader (5 vs 5.1).
      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

      Onyx Boox Note 4 supports an older Bluetooth version than the average eReader (5 vs 5.1).5.0 vs 5.1
    Total
    Overall
    Display
    Connectivity
    Design

    Graphic comparison of Onyx Boox Note 4 and other eReaders

    Attribute category
    Attribute
    No results found

    Third-party reviews

    What customers like about Onyx Boox Note 4?

    • Runs Android 13 with full access to the Google Play Store for third-party apps
    • Excellent writing experience with a textured screen that feels like paper and zero noticeable lag
    • Versatile 10.3-inch Kaleido 3 color E-ink display is great for comics and PDF annotations
    • Snappy performance with 6GB of RAM and a faster octa-core processor compared to previous models
    • Flexible storage with a microSD card slot supporting up to 2TB
    • Useful productivity features like split-screen mode and built-in OCR for handwriting-to-text
    • Long-lasting battery life that can last for weeks under light-to-moderate use

    What customers dislike about Onyx Boox Note 4?

    • Relatively expensive compared to non-color E-ink devices or base-model iPads
    • Screen appears darker than black-and-white E-ink displays, often requiring the front light even in well-lit rooms
    • Color resolution (150 PPI) is noticeably less sharp than the black-and-white resolution (300 PPI)
    • Built-in speakers are weak with poor bass and low maximum volume
    • Lacks physical volume buttons, requiring manual swiping on the screen to adjust audio
    • No IP rating for water or dust resistance
    • The device is quite heavy (420-430g) and can be tiring to hold with one hand for long periods

    Expert reviews

    P
    pocket-lint.com
    10/12/2024
    Boox Note Air4 C review: Only subtle upgrades - Pocket-lint

    The Boox Note Air4 C is a versatile 10.3-inch E-Ink tablet running Android 13, offering a premium 5.8mm thin metal design, a microSD card slot, and full access to the Google Play Store for varied app usage. The writing experience is a highlight, featuring a natural, textured screen, though the stylus feels light and lacks a built-in eraser. While excellent for note-taking and...Read more

    I
    ign.com
    17/07/2025
    Boox Note Air 4C Review - IGN

    The Boox Note Air 4C is a 10.3-inch Android-based E-Ink tablet featuring a Kaleido 3 color display, serving as a versatile productivity tool with access to the Google Play Store. Its key pros include a snappy octa-core processor, an improved paper-like writing experience, and microSD support for extensive storage. However, the device is limited by a, sometimes, less-than-ideal color...Read more

    C
    cnet.com
    02/03/2025
    Boox Note Air4 C Review: A Colorful Blend of E-Ink Tablet and E-Reader

    The Boox Note Air4 C is a versatile 10.3-inch hybrid tablet featuring a Kaleido 3 color e-ink display and Android 13, allowing for extensive app support via the Google Play Store. Key strengths include a paper-like writing experience, 6GB of RAM for smooth multitasking, and an improved design over its predecessors. However, drawbacks include a slightly dim display without the...Read more

    U
    uk.pcmag.com
    21/07/2025
    Onyx Boox Note Air 4 C - Review 2025 - PCMag UK

    The Onyx Boox Note Air 4 C is highly recommended as a top color E Ink tablet, featuring a premium 10.3-inch metal chassis and a 4,096-color Kaleido 3 display ideal for reading comics and PDFs. With 6GB of RAM and Android 13, it offers versatile access to the Google Play Store and excellent note-taking capabilities, providing a natural, lag-free writing experience. Key drawbacks...Read more

    L
    lesnumeriques.com
    16/12/2024
    Boox Note Air4 C Review: A high-end hybrid between e-reader, tablet, and notebook

    The Boox Note Air4 C is a 10.3-inch color E-Ink tablet featuring a Kaleido 3 screen (300 PPI for B&W, 150 PPI for color) and Boox Super Refresh (BSR) technology to minimize ghosting. It runs Android 13, offering full Google Play Store access for app versatility, paired with 6GB of RAM for improved performance over predecessors. Notable pros include a slim, premium magnesium-aluminum...Read more

    (Translated)Show original
    L
    larazon.es
    26 de diciembre de 2024
    BOOX Note Air4 C Review: An E-reader-inspired tablet for enjoying manga and comics

    The Boox Note Air4 C is a 10.3-inch color e-ink tablet running Android 13, featuring a Kaleido 3 display ideal for reading manga, comics, and note-taking with a paper-like feel. Powered by a fast octa-core processor and 6GB of RAM, it offers excellent multitasking and versatility through full Google Play Store access. While praised for its superior writing experience and low...Read more

    (Translated)Show original
    H
    hackerjournal.it
    10/02/2026
    Hardware Test: BOOX Note Air4 C. Would you like to see a comparison table of the technical specifications for this specific model against the previous...

    The ONYX BOOX Note Air4 C is a 10.3-inch Android 13-powered color E Ink tablet featuring a 300 ppi Kaleido 3 display (150 ppi for color) and upgraded 6GB of RAM. It functions as a premium, lightweight digital notebook with a robust note-taking experience, versatile app support via the Google Play Store, and improved, brighter front lighting. However, the device has limitations,...Read more

    (Translated)Show original
    A
    andreagaleazzi.com
    12/02/2025
    E-INK TABLET COMPARISON: reMarkable Paper Pro vs. Boox Note Air4 C vs. Kindle Scribe 2024

    Andrea Galeazzi compares the reMarkable Paper Pro, Boox Note Air 4C, and Kindle Scribe (2024), highlighting the reMarkable Paper Pro as the premier, distraction-free writing experience with its 11.8-inch Canvas Colour display, though it suffers from high cost and a closed ecosystem. The Boox Note Air 4C is identified as the versatile, Android-based, feature-rich choice, suited for...Read more

    (Translated)Show original
    H
    hwupgrade.it
    08/08/2025
    BOOX Note Air4 C is a showstopper: the E Ink Android tablet for reading and writing

    The Boox Note Air4 C is a premium 10.3-inch color E-Ink tablet featuring a Kaleido 3 display (300 PPI B&W, 150 PPI color) combined with an Android 13 operating system. Upgraded with a faster octa-core processor, 6GB of RAM, and Boox Super Refresh (BSR) technology, it delivers high responsiveness and reduced ghosting for note-taking and app navigation. BOOX Shop – The Key strengths...Read more

    (Translated)Show original
    N
    notebookcheck.nl
    01/12/2025
    Boox Note Air4 C in a short test

    The Boox Note Air4 C is a 10.3-inch E-Ink tablet featuring Android 13 with full Google Play Store access, a 4,096-color Kaleido 3 screen, and a capable Snapdragon 750G processor. Key advantages include its excellent note-taking experience with the Pen Plus stylus, a sleek 5.8 mm aluminum design, expanded storage via microSD, and solid battery life. However, the device suffers from...Read more

    (Translated)Show original

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