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Products in this category are scored under Frontum Robot Vacuums Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
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DREAME X40 Ultra review: 118 specs compared

Avg. price:~£460Max suction power:12000 PaRuntime:194 minDustbin capacity:300 mLMax threshold height:22 mm

DREAME X40 Ultra Review: Compare 118 technical specifications and user reviews to see how this product ranks in the Robot Vacuums category and whether it is worth buying.

DREAME X40 Ultra
8.6/10

Overall score

Score
8.6/ 10
✕
What it is
An overall evaluation of the robot vacuum's quality, based on technical analyses and user reviews.
When it matters
When you need a quick reference to identify the best robot vacuums on the market.
Score distribution
▼
<55-66-77-88-99-10
Score components

80%

8.8

Technical score

20%

8.2

User score

★Better than 95% of robot vacuums
8.5

Value for money

Value for money
8.5/ 10
✕
What it is
An indicator that combines the robot vacuum's overall rating with its cost.
When it matters
When you are looking for a robot vacuum with a good balance between quality and price.
Score distribution
▼
<55-66-77-88-99-10
Score components

70%

8.6

Overall score

30%

8.1

Price

★Better than 94%
8.8

Technical score

Technical score
8.8/ 10
✕
What it is
An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.
When it matters
When you want to compare robot vacuums based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
Score components

30%

9.2

Cleaning

23%

9.3

Navigation

18%

8.8

Mopping

12%

7.7

Battery

10%

9.8

Smart Features

7%

5.3

Design

★Better than 95%
8.2

User score

User score
8.2/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the robot vacuum
When it matters
When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.
Score distribution
▼
<55-66-77-88-99-10
Score components

70%

8.1

User ratings

30%

8.4

Number of reviews

Based on ratings from across the web.
▲Better than 73%
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of robot vacuum DREAME X40 Ultra

Technical score
Technical score
8.8/ 10
✕
What it is
An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.
When it matters
When you want to compare robot vacuums based on technical performance and available features.
Score distribution
▼
<55-66-77-88-99-10
Score components:

30%

9.2

Cleaning

23%

9.3

Navigation

18%

8.8

Mopping

12%

7.7

Battery

10%

9.8

Smart Features

7%

5.3

Design

8.8
User score
User score
8.2/ 10
✕
What it is
A rating that combines user reviews and the total number of reviews received by the robot vacuum
When it matters
When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.
Score distribution
▼
<55-66-77-88-99-10
Score components

70%

8.1

User ratings

30%

8.4

Number of reviews

Based on ratings from across the web.
8.2
Popularity
Popularity
8.4/ 10
✕
What it is
An indicator based on the number of reviews received by the robot vacuum.
When it matters
When you prefer to purchase a product chosen and reviewed by many other consumers.
Score distribution
▼
<55-66-77-88-99-10
Popularity:
DREAME X40 Ultra has a popularity index of 8.4, higher than that of 71.5% of robot vacuums and equal to that of 2.6% of robot vacuums.
8.4
Value for money
Value for money
8.5/ 10
✕
What it is
An indicator that combines the robot vacuum's overall rating with its cost.
When it matters
When you are looking for a robot vacuum with a good balance between quality and price.
Score distribution
▼
<55-66-77-88-99-10
Score components:

70%

8.6

Overall score

30%

8.1

Price

8.5
Max suction power
12,000 Pa
This robot vacuum has a maximum suction pressure of 12,000 Pa, which is higher than 89.7% of robot vacuums and equal to 1.3% of robot vacuums.
N. of suction power levels
5
This robot vacuum has 5 suction power levels, which is more than 93.7% of robot vacuums offer and the same number as 6.1% of robot vacuums offer.
Motor type
brushless
This robot vacuum uses a brushless motor, a type that is generally more efficient than those used by 2.7% of robot vacuums and also used by 97.3% of robot vacuums.
Power
?
Cleaning modes
5
This robot vacuum offers 5 cleaning modes, which is more than 85.9% of robot vacuums offer and the same number as 6.2% of robot vacuums offer.
Show more
Mopping capability
yes
This robot vacuum can mop floors. 78.8% of robot vacuums offer this feature.
Mopping system type
rotating pads
This robot vacuum uses rotating pads for mopping. This system is more effective than those on 79.6% of robot vacuums and as effective as those on 16% of robot vacuums.
Mop pad type
circular
Mop pad material
microfiber
Mop pressure
?
Show more
Primary navigation technology
LiDAR
This robot vacuum uses LiDAR as its primary navigation system, which is more capable than the systems in 34.7% of robot vacuums and matched by 60.4% of robot vacuums.
Mapping capability
yes
This robot vacuum maps the floor. 74% of robot vacuums offer this feature.
Real-time mapping
yes
This robot vacuum updates its map in real time. 68.5% of robot vacuums offer this feature.
Multiple map storage
yes
This robot vacuum stores multiple maps. 56.4% of robot vacuums offer this feature.
Map editing
yes
This robot vacuum lets you edit maps. 63.8% of robot vacuums offer this feature.
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App control
yes
This robot vacuum supports app control. 5.5% of robot vacuums support app control.
App name
Dreamehome
Wi-Fi connectivity
yes
This robot vacuum supports Wi-Fi connectivity. 6.3% of robot vacuums support Wi-Fi connectivity.
Supported Wi-Fi bands
2.4 GHz
Bluetooth connectivity
yes
This robot vacuum supports Bluetooth connectivity. 35.5% of robot vacuums support Bluetooth connectivity.
Show more
Battery capacity
6,400 mAh
This robot vacuum has a battery capacity of 6,400 mAh, which is higher than 94.5% of robot vacuums and equal to 5.5% of robot vacuums.
Battery type
Li-ion
Battery voltage
14.4 V
Runtime
194 min
This robot vacuum runs for 194 min per charge, which is longer than 77% of robot vacuums.
Recharge and resume
yes
This robot vacuum resumes cleaning after charging. 83.1% of robot vacuums offer this feature.
Show more
Shape
round
Height
97 mm
Width
350 mm
Length
350 mm
Weight
4.1 kg
This robot vacuum weighs 4.1 kg, making it heavier than 74.3% of robot vacuums and the same weight as 2.5% of robot vacuums.
Show more

DREAME X40 Ultra vs the average robot vacuum

246810TotalBatteryDesignSmart FeaturesNavigationCleaningMopping
  • 8,000 Pa stronger maximum suction
    This robot vacuum has stronger maximum suction than the average robot vacuum (12,000 Pa vs 4,000 Pa). The average robot vacuum has a maximum suction pressure of 4,000 Pa.
    12,000 Pa vs 4,000 Pa
  • Has anti-tangle technology
    This robot vacuum has anti-tangle technology, while the average robot vacuum does not. 42.8% of robot vacuums offer this feature.
  • Lifts its mop over carpets
    This robot vacuum lifts its mop over carpets, while the average robot vacuum does not lift its mop automatically.
  • Better mopping system
    This robot vacuum uses rotating pads for mopping, while the average robot vacuum uses static pad.
    rotating pads vs static pad
  • 3,200 mAh greater battery capacity
    This robot vacuum has a greater battery capacity than the average robot vacuum (6,400 mAh vs 3,200 mAh). The average robot vacuum has a battery capacity of 3,200 mAh.
    6,400 mAh vs 3,200 mAh
  • 120 more object types recognised
    This robot vacuum recognises more object types than the average robot vacuum (120 vs 0). The average robot vacuum recognises 0 object types.
    120 vs 0
  • Empties its dustbin automatically
    This robot vacuum empties its dustbin automatically, while the average robot vacuum requires manual dustbin emptying.
  • Cleans its mop automatically at the dock
    This robot vacuum cleans its mop automatically at the dock, while the average robot vacuum does not clean its mop automatically at the dock.
  • 11.8% better value for money
    DREAME X40 Ultra has better value for money than the average robot vacuum (8.48 vs 7.6).
    8.48 vs 7.59
  • 3,200 mAh greater battery capacity
    This robot vacuum has a greater battery capacity than the average robot vacuum (6,400 mAh vs 3,200 mAh). The average robot vacuum has a battery capacity of 3,200 mAh.
    6,400 mAh vs 3,200 mAh
  • 44 min longer runtime
    This robot vacuum runs longer per charge than the average robot vacuum (194 min vs 150 min). The average robot vacuum runs for 150 min.
    194 min vs 150 min
  • Supports fast charging
    This robot vacuum supports fast charging, while the average robot vacuum does not support fast charging.
  • Supports off-peak charging
    This robot vacuum supports off-peak charging, while the average robot vacuum does not support off-peak charging.
  • 30 m² larger cleaning area
    This robot vacuum has a larger maximum cleaning area than the average robot vacuum (210 m² vs 180 m²). The average robot vacuum has a maximum cleaning area of 180 m².
    210 m² vs 180 m²
  • Newer model
    This robot vacuum was released in 2024, later than the average robot vacuum in 2023. The average release year for robot vacuums is 2023.
    2024 vs 2023
  • Detects liquid spills
    This robot vacuum detects liquid spills, while the average robot vacuum does not. 5.4% of robot vacuums offer this feature.
  • Supports remote camera monitoring
    This robot vacuum supports remote camera monitoring, while the average robot vacuum does not. 13.4% of robot vacuums support this.
  • Has a child lock
    This robot vacuum has a child lock, while the average robot vacuum does not. 44.9% of robot vacuums offer this.
  • 15 more languages supported
    This robot vacuum supports more languages than the average robot vacuum (32 vs 17). The average robot vacuum supports 17 languages.
    32 vs 17
  • 120 more object types recognised
    This robot vacuum recognises more object types than the average robot vacuum (120 vs 0). The average robot vacuum recognises 0 object types.
    120 vs 0
  • 2 mm higher threshold clearance
    This robot vacuum can cross higher thresholds than the average robot vacuum (22 mm vs 20 mm). The average robot vacuum can cross thresholds up to 20 mm high.
    22 mm vs 20 mm
  • 8,000 Pa stronger maximum suction
    This robot vacuum has stronger maximum suction than the average robot vacuum (12,000 Pa vs 4,000 Pa). The average robot vacuum has a maximum suction pressure of 4,000 Pa.
    12,000 Pa vs 4,000 Pa
  • Has anti-tangle technology
    This robot vacuum has anti-tangle technology, while the average robot vacuum does not. 42.8% of robot vacuums offer this feature.
  • Empties its dustbin automatically
    This robot vacuum empties its dustbin automatically, while the average robot vacuum requires manual dustbin emptying.
  • Detects dirtier areas
    This robot vacuum detects dirtier areas, while the average robot vacuum does not detect dirtier areas.
  • 0.97 % higher filter efficiency
    This robot vacuum has higher filter efficiency than the average robot vacuum (100 % vs 99 %). The average robot vacuum has a filter efficiency of 99 %.
    99.97 % vs 99 %
  • 1 more cleaning modes
    This robot vacuum offers more cleaning modes than the average robot vacuum (5 vs 4). The average robot vacuum offers 4 cleaning modes.
    5 vs 4
  • 22 mm wider main brush
    This robot vacuum has a wider main brush than the average robot vacuum (200 mm vs 178 mm). The average robot vacuum has a main brush 178 mm wide.
    200 mm vs 178 mm
  • 1 more suction power levels
    This robot vacuum offers more suction power levels than the average robot vacuum (5 vs 4). The average robot vacuum offers 4 suction power levels.
    5 vs 4
  • 0.2 L larger auto-empty dust bag
    This robot vacuum has a larger auto-empty dust bag than the average robot vacuum (3.2 L vs 3 L). The average auto-empty dust bag capacity is 3 L.
    3.2 L vs 3 L
  • Lifts its mop over carpets
    This robot vacuum lifts its mop over carpets, while the average robot vacuum does not lift its mop automatically.
  • Better mopping system
    This robot vacuum uses rotating pads for mopping, while the average robot vacuum uses static pad.
    rotating pads vs static pad
  • Cleans its mop automatically at the dock
    This robot vacuum cleans its mop automatically at the dock, while the average robot vacuum does not clean its mop automatically at the dock.
  • Dries the mop automatically
    This robot vacuum dries its mop automatically at the dock, while the average robot vacuum does not. 18.5% of robot vacuums offer this.
  • Refills its water tank automatically
    This robot vacuum refills its water tank automatically, while the average robot vacuum requires manual water refilling.
  • Washes the mop with hot water
    This robot vacuum washes its mop with hot water at the base station, while the average robot vacuum does not. 13.4% of robot vacuums offer this.
  • 29 more water flow levels
    This robot vacuum offers more water flow levels than the average robot vacuum (32 vs 3). The average number of water flow levels is 3.
    32 vs 3
  • Dispenses cleaning solution automatically
    This robot vacuum dispenses cleaning solution automatically, while the average robot vacuum does not. 26.4% of robot vacuums offer this.
  • Supports cleaning solution
    This robot vacuum supports cleaning solution for mopping, while the average robot vacuum does not. 44.8% of robot vacuums support this.
  • 500 mL more clean water capacity
    This robot vacuum has a larger base station clean water tank than the average robot vacuum (4,500 mL vs 4,000 mL). The average base station clean water tank holds 4,000 mL.
    4,500 mL vs 4,000 mL
  • 500 mL more dirty water capacity
    This robot vacuum has a larger base station dirty water tank than the average robot vacuum (4,000 mL vs 3,500 mL). The average base station dirty water tank holds 3,500 mL.
    4,000 mL vs 3,500 mL
  • 160 mL less onboard water capacity
    This robot vacuum has a smaller onboard water tank than the average robot vacuum (80 mL vs 240 mL). The average robot vacuum's onboard water tank holds 240 mL.
    80 mL vs 240 mL
  • 100 mL smaller dustbin
    This robot vacuum has a smaller onboard dustbin than the average robot vacuum (300 mL vs 400 mL). The average robot vacuum has a dustbin capacity of 400 mL.
    300 mL vs 400 mL
  • 11 dB louder
    This robot vacuum has a higher reported cleaning noise level than the average robot vacuum (76 dB vs 65 dB). The average robot vacuum has a reported noise level of 65 dB.
    76 dB vs 65 dB
  • 14.8% heavier
    This robot vacuum is heavier than the average robot vacuum (4.1 kg vs 3.57 kg). The average robot vacuum weighs 3.57 kg.
    4.1 kg vs 3.57 kg
  • 3.5 W higher standby power consumption
    This robot vacuum draws more power in standby than the average robot vacuum (5.5 W vs 2 W). The average robot vacuum draws 2 W in standby.
    5.5 W vs 2 W
  • 4.9 kg heavier base station
    This robot vacuum has a heavier base station than the average robot vacuum (9.2 kg vs 4.3 kg). The average robot vacuum's base station weighs 4.3 kg.
    9.2 kg vs 4.3 kg
  • 76.9% more expensive
    DREAME X40 Ultra is more expensive than the average robot vacuum (£460 vs £260).
    £460 vs £260
  • 76.9% more expensive
    DREAME X40 Ultra is more expensive than the average robot vacuum (£460 vs £260).
    £460 vs £260
  • 3.5 W higher standby power consumption
    This robot vacuum draws more power in standby than the average robot vacuum (5.5 W vs 2 W). The average robot vacuum draws 2 W in standby.
    5.5 W vs 2 W
  • 11 dB louder
    This robot vacuum has a higher reported cleaning noise level than the average robot vacuum (76 dB vs 65 dB). The average robot vacuum has a reported noise level of 65 dB.
    76 dB vs 65 dB
  • 14.8% heavier
    This robot vacuum is heavier than the average robot vacuum (4.1 kg vs 3.57 kg). The average robot vacuum weighs 3.57 kg.
    4.1 kg vs 3.57 kg
  • 4.9 kg heavier base station
    This robot vacuum has a heavier base station than the average robot vacuum (9.2 kg vs 4.3 kg). The average robot vacuum's base station weighs 4.3 kg.
    9.2 kg vs 4.3 kg
  • 100 mL smaller dustbin
    This robot vacuum has a smaller onboard dustbin than the average robot vacuum (300 mL vs 400 mL). The average robot vacuum has a dustbin capacity of 400 mL.
    300 mL vs 400 mL
  • 160 mL less onboard water capacity
    This robot vacuum has a smaller onboard water tank than the average robot vacuum (80 mL vs 240 mL). The average robot vacuum's onboard water tank holds 240 mL.
    80 mL vs 240 mL

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

V
vacuumwars.com
10/06/2024
Summary of the review
T
techradar.com
02/01/2025
Summary of the review
E
everydayhomecomfort.com
16/06/2026
Summary of the review
T
techgearlab.com
21/06/2025
Summary of the review
R
robotobzor.com
15/12/2024
Summary of the review
I
im.com.au
18/07/2024
Summary of the review
G
galaxus.at
09/10/2024
Summary of the review
G
galaxus.ch
09/10/2024
Summary of the review
C
community.heyupnow.com
31/05/2024
Summary of the review
C
chip.de
17/04/2024
Summary of the review
C
connect.de
07/05/2024
Summary of the review
N
nextpit.de
22/05/2024
Summary of the review
H
heise.de
27/06/2024
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G
galaxus.ch
09/10/2024
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I
imtest.de
28/11/2024
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smart-home-fox.de
15/09/2025
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computerbild.de
05/08/2024
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chip.de
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10/05/2024
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Third-party reviews

Based on ratings from across the web.
Reviews last updated: July 2026 · How we calculate this

What customers like about DREAME X40 Ultra

  • Exceptional 12,000Pa suction power that lifts fine dirt, pet hair, and large debris effortlessly from hard floors.
  • Innovative auto-extending side brush and mop heads that thoroughly clean tight corners, furniture legs, and skirting boards.
  • Outstanding mopping performance capable of removing dried-on liquid stains rather than just surface-wiping.
  • Advanced AI camera and 3D structured light system providing nearly perfect obstacle avoidance and rapid house mapping.
  • Highly automated base station that auto-empties dirt, washes pads with 70°C/80°C hot water, and dries them with hot air.
  • Intelligent floor management that automatically lifts mop pads or detaches them magnetically at the base station to keep carpets completely dry.
  • Long-lasting 6,400 mAh battery life that comfortably handles large floor plans on a single charge.
  • Deep customisation options in the companion app allowing users to fine-tune suction levels and water wetness for individual rooms.

What customers don't like about DREAME X40 Ultra

  • Extremely high initial premium price tag and expensive ongoing maintenance costs for official replacement parts and solutions.
  • The standard main rubber roller brush easily tangles with longer human and pet hair, requiring manual cutting.
  • The automated base station is exceptionally large and bulky, taking up a significant amount of physical floor space.
  • Occasional software glitches, unoptimized cleaning paths on initial runs, and a steep learning curve with the mobile application.
  • The auto-empty suction mechanism in the base station can occasionally fail to completely clear damp debris from the on-board robot bin.
  • Buggy automatic carpet recognition on 'Clean Genius' mode that occasionally attempts to mop low-pile carpets instead of lifting the pads.
  • Inconsistent customer support responsiveness from the manufacturer when addressing hardware defects or loss of airflow.
  • The side brush historically deactivates and stops spinning entirely when operating on carpeted surfaces.

Verdict

The Dreame X40 Ultra is a flagship robot vacuum and mop that delivers a market-leading 12,000 Pa of Vormax suction power alongside an advanced 6,400 mAh battery providing up to 198 minutes of runtime. It distinguishes itself with SideReach and MopExtend RoboSwing technologies, which utilize a liftable, extendable side brush and a swing-out rotating mop pad to clean deep into corners and within 0.04 inches of edges. Main pros include its fully automated base station that empties a 300 mL onboard dustbin into a 3.2 L bag, refills an 80 mL internal water tank from a 4.5 L reservoir, and washes the mops with 158°F (70°C) hot water before auto-drying them with hot air. Additionally, it offers exceptional AI-driven RGB and 3D structured light obstacle avoidance capable of recognizing over 120 distinct items, and it can automatically lift its mops 10.5 mm or detach them entirely at the dock to keep carpets dry. However, major cons include its very high retail price, its failure to capture significant amounts of pet hair with the standard rubber brush, and the bulky footprint of its base station, which stands nearly 24 inches tall.

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