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2026 comparison
Updated Jan 16, 2026
|Sources: Amazon, ManufactureriRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop vs Roborock Qrevo S
If you are torn between iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop and Roborock Qrevo S, this breakdown is for you. We compare specs, pros, and cons so you can decide confidently.
Ratings: 3.6★ vs 4.4★
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iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop
★3.6
(1,171)•Amazon
Navigation:PrecisionVision Navigation (Camera-based VSLAM with object recognition and avoidance).
Mapping:Imprint Smart Mapping (Stores up to 10 maps, room segmentation, room naming, and Keep Out Zones).
Obstacle Avoidance:PrecisionVision with AI (Identifies and avoids cords, pet waste, shoes, socks, and seasonal items).
Suction Pa:Not published (Rated 100% stronger suction vs. Roomba i-Series / 2x Power-Lifting Suction).
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Roborock Qrevo S
★4.4
(2,037)•Amazon
Navigation:PreciSense® LiDAR Navigation with 3D Mapping and quick map creation.
Mapping:Yes (Multi-level mapping up to 4 floors; Matrix and 3D map viewing).
Obstacle Avoidance:Reactive Tech Obstacle Avoidance (Structured Light technology; avoids hazards without cameras).
Suction Pa:7000Pa (Max+ Mode)
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Comparison: iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop vs Roborock Qrevo S
iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop
★3.6(1,171)Amazon
Roborock Qrevo S
★4.4(2,037)Amazon
| Criterion | iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop | Roborock Qrevo S |
|---|---|---|
| Rating | ★3.6(1,171)Amazon | ★4.4(2,037)Amazon |
Navigation | PrecisionVision Navigation (Camera-based VSLAM with object recognition and avoidance). | PreciSense® LiDAR Navigation with 3D Mapping and quick map creation. |
Mapping | Imprint Smart Mapping (Stores up to 10 maps, room segmentation, room naming, and Keep Out Zones). | Yes (Multi-level mapping up to 4 floors; Matrix and 3D map viewing). |
Obstacle Avoidance | PrecisionVision with AI (Identifies and avoids cords, pet waste, shoes, socks, and seasonal items). | Reactive Tech Obstacle Avoidance (Structured Light technology; avoids hazards without cameras). |
Suction Pa | Not published (Rated 100% stronger suction vs. Roomba i-Series / 2x Power-Lifting Suction). | 7000Pa (Max+ Mode) |
Brush System | Dual Multi-Surface Rubber Brushes (Resistant to hair tangles) + Edge-Sweeping Brush. | All-Rubber Main Brush (Floating design to resist hair tangles) + side brush. |
Mopping | SmartScrub System (Back-and-forth scrubbing motion with consistent pressure). | Dual Spinning Mops (200 RPM, consistent downward pressure, 30 water flow levels). |
Mop Lift | Auto-Retract Mopping System (Lifts mop pad to the top of the robot to keep carpets completely dry). | 0.39" (10 mm) Auto Mop Lifting |
Carpet Boost | Yes (Carpet Boost automatically increases suction on carpets). | Yes (Carpet Boost+ system; double cleaning on carpets supported). |
Battery | 14.4V / 4460 mAh Lithium-ion | Lithium-ion (5200 mAh) |
Runtime | Up to 120 min (Recharge and Resume supported) | Up to 180 min (Quiet Mode) |
Charging Time | Approx. 3 hours | Approx. 4 hours (Supports Off-Peak Charging) |
Dustbin | 0.08 gal (313 mL) — Internal bin | Robot: 330 mL; Dock Bag: 2.7 L (approx. 7 weeks without emptying). |
Water Tank | 0.05 gal (210 mL) — Internal tank (Auto-refilled by dock) | Robot: 80 mL (Electronic); Dock Clean Tank: 1.06 gal (4 L); Dock Dirty Tank: ~0.9 gal (3.5 L). |
Auto Empty | Yes | Yes (Auto-Dust Emptying) |
Dock Type | Clean Base Auto-Fill Dock (Empties debris for up to 60 days, refills water for up to 30 days; 15.8" W x 16.4" D x 16.3" H). | Multifunctional Dock (Washes Mops, Dries Mops, Empties Dust, Refills Tank) |
Mop Wash | No (Pad requires manual washing) | Yes (Auto Mop Washing with adjustable duration/frequency). |
Mop Dry | No | Yes (Warm Air Drying at 113°F/45°C). |
Filtration | High-Efficiency Filter (Captures 99% of cat and dog allergens) | E11 Rated Air Filter (Washable) |
Noise Level | Approx. 68 dB | Robot: approx. 63 dB (Balanced); Dock Drying: 45 dB. |
App Features | iRobot Home App (Dirt Detective prioritizes dirty rooms, Clean While I'm Away, SmartScrub settings, Pet Owner Official Promise). | Roborock App: SmartPlan™ (AI generated cleaning), Custom Schedules, Pin n Go, No-Go Zones, Apple Watch support. |
Voice Assistants | Amazon Alexa, Google Assistant, Apple Siri. | Alexa, Google Assistant, Siri Shortcuts |
Multi Floor | Yes (Imprint Smart Mapping stores multiple floor plans). | Yes (Automatic floor recognition) |
Threshold Climb | 0.6" (1.6 cm) — Reduced slightly due to mopping mechanism | 0.79" (2 cm) |
Height | 3.40" (87 mm) | 3.80" |
Dimensions | 13.70" (L) x 13.70" (W) x 3.40" (H) | 13.9" (L) x 13.8" (W) x 3.8" (H) |
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iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop
Rating:★3.6(1,171)Amazon
Navigation:PrecisionVision Navigation (Camera-based VSLAM with object recognition and avoidance).
Mapping:Imprint Smart Mapping (Stores up to 10 maps, room segmentation, room naming, and Keep Out Zones).
Obstacle Avoidance:PrecisionVision with AI (Identifies and avoids cords, pet waste, shoes, socks, and seasonal items).
Suction Pa:Not published (Rated 100% stronger suction vs. Roomba i-Series / 2x Power-Lifting Suction).
Brush System:Dual Multi-Surface Rubber Brushes (Resistant to hair tangles) + Edge-Sweeping Brush.
Mopping:SmartScrub System (Back-and-forth scrubbing motion with consistent pressure).
Mop Lift:Auto-Retract Mopping System (Lifts mop pad to the top of the robot to keep carpets completely dry).
Carpet Boost:Yes (Carpet Boost automatically increases suction on carpets).
Battery:14.4V / 4460 mAh Lithium-ion
Runtime:Up to 120 min (Recharge and Resume supported)
Charging Time:Approx. 3 hours
Dustbin:0.08 gal (313 mL) — Internal bin
Water Tank:0.05 gal (210 mL) — Internal tank (Auto-refilled by dock)
Auto Empty:Yes
Dock Type:Clean Base Auto-Fill Dock (Empties debris for up to 60 days, refills water for up to 30 days; 15.8" W x 16.4" D x 16.3" H).
Mop Wash:No (Pad requires manual washing)
Mop Dry:No
Filtration:High-Efficiency Filter (Captures 99% of cat and dog allergens)
Noise Level:Approx. 68 dB
App Features:iRobot Home App (Dirt Detective prioritizes dirty rooms, Clean While I'm Away, SmartScrub settings, Pet Owner Official Promise).
Voice Assistants:Amazon Alexa, Google Assistant, Apple Siri.
Multi Floor:Yes (Imprint Smart Mapping stores multiple floor plans).
Threshold Climb:0.6" (1.6 cm) — Reduced slightly due to mopping mechanism
Height:3.40" (87 mm)
Dimensions:13.70" (L) x 13.70" (W) x 3.40" (H)
✓ Pros:
- • Clean Base Auto-Fill Dock automates both dust emptying and water refilling
- • Auto-Retract Mopping System is the industry standard for keeping high-pile carpets dry
- • Dirt Detective (iRobot OS) automatically prioritizes the dirtiest rooms
- • Dual Multi-Surface Rubber Brushes are excellent for pet hair and carpets
- • Elegant dock design with a wood-like surface top
✗ Cons:
- • Dock does not wash or dry the mop pad (requires manual maintenance)
- • Navigation and mapping are slower than LiDAR-based competitors
- • Lacks live video monitoring despite having a camera (privacy-focused)
- • Small onboard dustbin relies heavily on frequent auto-emptying
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Roborock Qrevo S
Rating:★4.4(2,037)Amazon
Navigation:PreciSense® LiDAR Navigation with 3D Mapping and quick map creation.
Mapping:Yes (Multi-level mapping up to 4 floors; Matrix and 3D map viewing).
Obstacle Avoidance:Reactive Tech Obstacle Avoidance (Structured Light technology; avoids hazards without cameras).
Suction Pa:7000Pa (Max+ Mode)
Brush System:All-Rubber Main Brush (Floating design to resist hair tangles) + side brush.
Mopping:Dual Spinning Mops (200 RPM, consistent downward pressure, 30 water flow levels).
Mop Lift:0.39" (10 mm) Auto Mop Lifting
Carpet Boost:Yes (Carpet Boost+ system; double cleaning on carpets supported).
Battery:Lithium-ion (5200 mAh)
Runtime:Up to 180 min (Quiet Mode)
Charging Time:Approx. 4 hours (Supports Off-Peak Charging)
Dustbin:Robot: 330 mL; Dock Bag: 2.7 L (approx. 7 weeks without emptying).
Water Tank:Robot: 80 mL (Electronic); Dock Clean Tank: 1.06 gal (4 L); Dock Dirty Tank: ~0.9 gal (3.5 L).
Auto Empty:Yes (Auto-Dust Emptying)
Dock Type:Multifunctional Dock (Washes Mops, Dries Mops, Empties Dust, Refills Tank)
Mop Wash:Yes (Auto Mop Washing with adjustable duration/frequency).
Mop Dry:Yes (Warm Air Drying at 113°F/45°C).
Filtration:E11 Rated Air Filter (Washable)
Noise Level:Robot: approx. 63 dB (Balanced); Dock Drying: 45 dB.
App Features:Roborock App: SmartPlan™ (AI generated cleaning), Custom Schedules, Pin n Go, No-Go Zones, Apple Watch support.
Voice Assistants:Alexa, Google Assistant, Siri Shortcuts
Multi Floor:Yes (Automatic floor recognition)
Threshold Climb:0.79" (2 cm)
Height:3.80"
Dimensions:13.9" (L) x 13.8" (W) x 3.8" (H)
✓ Pros:
- • High-end 7000Pa suction combined with effective dual spinning mops
- • All-in-one dock handles emptying, refilling, washing, and drying
- • 10mm mop lift is higher than many competitors, keeping carpets dry
- • Reactive Tech provides reliable navigation without the privacy concerns of RGB cameras
✗ Cons:
- • Smaller onboard water tank (80ml) requires frequent dock trips for refilling
- • Lacks the built-in detergent dispenser found in the higher-end Master/Ultra series
- • Object avoidance is structured light, not the advanced AI camera found on MaxV models
- • Main rubber brush has floating axles but is not the dual-roller DuoRoller™ system
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Which one is better?
Looking at user satisfaction (Roborock Qrevo S: 3.6★ vs iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop: 4.4★), Roborock Qrevo S pulls ahead. The gap is small—choose based on the priorities below.
Who should buy each?
For performance and polish: iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop (Clean Base Auto-Fill Dock automates both dust emptying and water refilling, Auto-Retract Mopping System is the industry standard for keeping high-pile carpets dry)
For value or versatility: Roborock Qrevo S (High-end 7000Pa suction combined with effective dual spinning mops, All-in-one dock handles emptying, refilling, washing, and drying)
Conclusion
With the key differences outlined, the decision should be clearer. Both options deliver quality—choose the one that fits your priorities.
Frequently Asked Questions
+Which has better value?
iRobot Roomba Combo j9+ Auto-Fill Robot Vacuum and Mop excels if you value clean base auto-fill dock automates both dust emptying and water refilling. Roborock Qrevo S is better if you prioritize high-end 7000pa suction combined with effective dual spinning mops. Pick based on your budget and daily use.
+Is this an independent review?
Yes. We use affiliate links for monetization, but recommendations are research-driven and unbiased.
+Do newer models exist?
Check release timelines from the manufacturers and compare pricing before you buy. We refresh this page when major updates land.
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