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  1. Home
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iRobot Roomba S9 vs Roomba 981

Which Robot Vacuum Is Better?

    Top
    Main Differences
    Design
      Build QualityBuild QualityUser MaintenanceRecurring CostStoringDimensionsDirt CompartmentInternal Dirt CompartmentStation Maintenance CapabilitiesIn The BoxRangePortabilityBatteryQuality-Of-Life FeaturesBrushroll And ToolsTools And BrushesAlternative Configuration
    Performance
      Bare Floor Performance (Hardwood, Laminate, Tiles)Hard Floor PickupLow-Pile Carpet PerformanceHigh-Pile Carpet PickupHigh-Pile Carpet PerformanceLow-Pile Carpet PickupPet Hair Floor PerformancePet Hair PickupSuctionAirflowNoiseHousehold AdaptabilityPet Hair Furniture PerformanceObstacle AvoidanceHeight ClearanceThreshold ClearanceAir QualityCracksStainsWater
    Automation
      Physical AutomationCompanion App Automation
    To Be Deleted
    Comments

Products

iRobot Roomba S9
iRobot Roomba 981

Tested using Methodology v1.0

Updated Aug 27, 2025 02:57 PM

SEE PRICE
iRobot

Tested using Methodology v0.7

Updated Jun 10, 2025 01:59 PM

SEE PRICE
Amazon.com
iRobot Roomba S9 Picture

Track

iRobot Roomba 981 Picture

Track

Wet Compatible
No
Lowest Height Cleared
9.5 cm (3.7'')
Obstacle Avoidance Technology
Light-Based
Max Threshold Height
1.9 cm (0.7")
Anti-Allergy Filter (HEPA)
Yes
Wet Compatible
No
Vacuum Type
Robot
Bagless
Yes
Cordless
Yes
Anti-Allergy Filter (HEPA)
Yes
  1. Recommended in 1 article:
  2. iRobot

Our Verdict

iRobot Roomba S9

iRobot Roomba 981

The iRobot Roomba S9 is better than the iRobot Roomba 981. The S9 feels better built, has a longer battery life, charges faster, delivers better performance on low- and high-pile carpets, and has a more advanced mapping system that stores a permanent map of its coverage area, allowing you to set up virtual boundary lines or schedule cleaning sessions for specific rooms. Meanwhile, the 981 incurs lower recurring costs.

0 

Variants

  • Roomba S9 (Black)
  • Roomba S9+ (Black)
  • Roomba 981 (Black)
  • Roomba 980 (Black)

Review

See iRobot Roomba S9 Review
See iRobot Roomba 981 Review
1 
0 

Check Price

Black
Roomba S9
SEARCH
Amazon.com
Black
Roomba 981
SEE PRICE
Amazon.com
Black
Roomba S9+
SEE PRICE
iRobot
Black
Roomba 980
SEE PRICE
Amazon.com
 
Night Blue
Roomba 981
SEARCH
Amazon.com
Read more

Main Differences for
Multi-Surface Household

Threshold 

0.10

Multi-Surface Household 
 

0.0
N/A
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Full Comparison

Design

Build Quality 
 

N/A
N/A

Vacuum Type 
 

Locked

Build Quality Picture  

iRobot Roomba S9 Build Quality Picture Sample

SAMPLE

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iRobot Roomba 981 Build Quality Picture Sample

SAMPLE

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Show Text 

Build Quality 
 

N/A
N/A

Build Quality Picture  

iRobot Roomba S9 Build Quality Picture Sample

SAMPLE

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iRobot Roomba 981 Build Quality Picture Sample

SAMPLE

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Vacuum & Mop Combo 
 

Locked
Show Text 

User Maintenance 
 

N/A
N/A

Maintenance Picture  

iRobot Roomba S9 Maintenance Picture Sample

SAMPLE

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for pictures & test results

iRobot Roomba 981 Maintenance Picture Sample

SAMPLE

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Brushroll Cleaning Video  

iRobot Roomba S9 Brushroll Cleaning Video Sample

SAMPLE

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iRobot Roomba 981 Brushroll Cleaning Video Sample

SAMPLE

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Show Text 

Recurring Cost 
 

N/A
N/A

Recurring Cost Picture  

iRobot Roomba S9 Recurring Cost Picture Sample

SAMPLE

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iRobot Roomba 981 Recurring Cost Picture Sample

SAMPLE

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Bag Part Number  

Locked
Locked

Filter Part Number  

Locked
Locked

HEPA Filter Part Number  

Locked
Locked
Show Text 

Storing 
 

N/A
N/A

Storing Picture  

iRobot Roomba S9 Storing Picture Sample

SAMPLE

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iRobot Roomba 981 Storing Picture Sample

SAMPLE

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Height 
 

Lock" (Lock cm)

Width 
 

Lock" (Lock cm)

Depth 
 

Lock" (Lock cm)

Cord Storing 
 

Locked

On-Board Tool Storage 
 

Locked

Vacuum Rack/Station 
 

Locked
Show Text 

Dimensions 
 

Robot Vacuum Dimensions  

iRobot Roomba S9 Robot Vacuum Dimensions Sample

SAMPLE

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iRobot Roomba 981 Robot Vacuum Dimensions Sample

SAMPLE

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Robot Vacuum Height  

Lock cm (Lock")

Robot Vacuum Width  

Lock cm (Lock")

Robot Vacuum Depth  

Lock cm (Lock")

Docking Station Dimensions  

iRobot Roomba S9 Docking Station Dimensions Sample

SAMPLE

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iRobot Roomba 981 Docking Station Dimensions Sample

SAMPLE

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Docking Station Height  

Lock cm (Lock")

Docking Station Width  

Lock cm (Lock")

Docking Station Depth  

Lock cm (Lock")
Show Text 

Dirt Compartment 
 

N/A
N/A

Dirt Compartment Picture  

iRobot Roomba S9 Dirt Compartment Picture Sample

SAMPLE

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iRobot Roomba 981 Dirt Compartment Picture Sample

SAMPLE

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Bagless 
 

Locked

Volume 
 

Lock gal (Lock L)

Full Indicator 
 

Locked

Bag Included 
 

Locked
Show Text 

Internal Dirt Compartment 
 

N/A
N/A

Dirt Compartment Photo  

iRobot Roomba S9 Dirt Compartment Photo Sample

SAMPLE

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iRobot Roomba 981 Dirt Compartment Photo Sample

SAMPLE

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Dirt Compartment Capacity 
 

Lock L

Full Indicator 
 

Locked
Show Text 

Station Maintenance Capabilities 
 

N/A
N/A

Station Photo  

iRobot Roomba S9 Station Photo Sample

SAMPLE

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iRobot Roomba 981 Station Photo Sample

SAMPLE

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for pictures & test results

Auto Empty 
 

Locked

Bagless Station 
 

Locked

Dirt Compartment Capacity 
 

Lock L

Automatic Tank Refill 
 

Locked

Mop Washing 
 

Locked

Mop Drying 
 

Locked
Show Text 

In The Box 
 

In The Box Picture  

iRobot Roomba S9 In The Box Picture Sample

SAMPLE

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iRobot Roomba 981 In The Box Picture Sample

SAMPLE

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Show Text 

Range 
 

N/A
N/A

Cordless 
 

Locked

Cord Length 
 

N/A

Hose Length 
 

N/A

Minimum Wand Length 
 

N/A

Maximum Wand Length 
 

N/A

Total Range 
 

N/A
Show Text 

Portability 
 

N/A
N/A

Total Weight 
 

Lock lbs (Lock kg)

Weight In Hand 
 

Lock lbs (Lock kg)

Carrying handle 
 

Locked
Show Text 

Battery 
 

N/A
N/A

Minimum Battery Life 
 

Lock min
Lock min

Maximum Battery Life 
 

Lock min
Lock min

Recharge Time 
 

Lock min
Lock min

Recharge Dock 
 

Locked

Battery Life Indicator 
 

Locked

Removable Batteries 
 

Locked
Locked
Show Text 

Quality-Of-Life Features 
 

Picture Of Controls  

iRobot Roomba S9 Picture Of Controls Sample

SAMPLE

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iRobot Roomba 981 Picture Of Controls Sample

SAMPLE

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for pictures & test results

Power Adjustment 
 

Locked
Locked

Easy On/Off 
 

Locked
Locked

Surface Type Adjustment 
 

Locked

Rotating Head 
 

Locked

Self-Propelled 
 

Locked

Headlights 
 

Locked

Head Surface Type Adjustment 
 

Locked
Show Text 

Brushroll And Tools 
 

Brushroll And Tools Photo  

iRobot Roomba S9 Brushroll And Tools Photo Sample

SAMPLE

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iRobot Roomba 981 Brushroll And Tools Photo Sample

SAMPLE

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Brushroll Setup 
 

Locked

Brushroll Type 
 

Locked

Side Brush Setup 
 

Locked

Side Brush Type 
 

Locked

Tools And Brushes 
 

Tools And Brush Picture  

iRobot Roomba S9 Tools And Brush Picture Sample

SAMPLE

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iRobot Roomba 981 Tools And Brush Picture Sample

SAMPLE

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Brushroll 
 

Locked

Brushroll On/Off 
 

Locked

Removable Brushroll 
 

Locked

Turbo Brush 
 

Locked

Crevice Tool 
 

Locked

Upholstery Tool 
 

Locked

Soft Bristle Brush 
 

Locked

Hard Bristle Brush 
 

Locked

Extension Wand 
 

Locked

Ceiling Fan Tool 
 

Locked

Pet Grooming Tool 
 

Locked
Show Text 

Alternative Configuration 
 

Alternative Configuration Photo 1  

iRobot Roomba S9 Alternative Configuration Photo 1 Sample

SAMPLE

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iRobot Roomba 981 Alternative Configuration Photo 1 Sample

SAMPLE

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Alternative Configuration Photo 2  

iRobot Roomba S9 Alternative Configuration Photo 2 Sample

SAMPLE

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iRobot Roomba 981 Alternative Configuration Photo 2 Sample

SAMPLE

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Blower Mode 
 

Locked
Show Text 
Performance

Bare Floor Performance (Hardwood, Laminate, Tiles) 
 

N/A
N/A

Setting Used  

Locked

Bare Floor Large Debris Graph  

iRobot Roomba S9 Bare Floor Large Debris Graph Sample

SAMPLE

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for pictures & test results

iRobot Roomba 981 Bare Floor Large Debris Graph Sample

SAMPLE

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for pictures & test results

Large Debris at 0 gal (0L)  

Lock%

Large Debris at 0.07 gal (0.25L)  

Lock%

Large Debris at 0.2 gal (0.75L)  

N/A

Large Debris at 0.4 gal (1.5L)  

N/A

Large Debris at 0.8 gal (3L)  

N/A

Large Debris at 1.6 gal (6L)  

N/A

Bare Floor Small Debris Graph  

iRobot Roomba S9 Bare Floor Small Debris Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

iRobot Roomba 981 Bare Floor Small Debris Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

Small Debris at 0 gal (0L)  

Lock%

Small Debris at 0.07 gal (0.25L)  

Lock%

Small Debris at 0.2 gal (0.75L)  

N/A

Small Debris at 0.4 gal (1.5L)  

N/A

Small Debris at 0.8 gal (3L)  

N/A

Small Debris at 1.6 gal (6L)  

N/A
Show Text 

Hard Floor Pickup 
 

N/A
N/A

Hard Floor Pickup Video  

iRobot Roomba S9 Hard Floor Pickup Video Sample

SAMPLE

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for videos & test results

iRobot Roomba 981 Hard Floor Pickup Video Sample

SAMPLE

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Hard Floor Pickup Post Test  

iRobot Roomba S9 Hard Floor Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Hard Floor Pickup Post Test Sample

SAMPLE

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Show Text 

Low-Pile Carpet Performance 
 

N/A
N/A

Setting Used  

Locked

Low Carpet Large Debris Graph  

iRobot Roomba S9 Low Carpet Large Debris Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

iRobot Roomba 981 Low Carpet Large Debris Graph Sample

SAMPLE

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for pictures & test results

Large Debris at 0 gal (0L)  

Lock%

Large Debris at 0.07 gal (0.25L)  

Lock%

Large Debris at 0.2 gal (0.75L)  

N/A

Large Debris at 0.4 gal (1.5L)  

N/A

Large Debris at 0.8 gal (3L)  

N/A

Large Debris at 1.6 gal (6L)  

N/A

Low Carpet Small Debris Graph  

iRobot Roomba S9 Low Carpet Small Debris Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

iRobot Roomba 981 Low Carpet Small Debris Graph Sample

SAMPLE

JOIN NOW

for pictures & test results

Small Debris at 0 gal (0L)  

Lock%

Small Debris at 0.07 gal (0.25L)  

Lock%

Small Debris at 0.2 gal (0.75L)  

N/A

Small Debris at 0.4 gal (1.5L)  

N/A

Small Debris at 0.8 gal (3L)  

N/A

Small Debris at 1.6 gal (6L)  

N/A
Show Text 

High-Pile Carpet Pickup 
 

N/A
N/A

High-Pile Carpet Pickup Video  

iRobot Roomba S9 High-Pile Carpet Pickup Video Sample

SAMPLE

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for videos & test results

iRobot Roomba 981 High-Pile Carpet Pickup Video Sample

SAMPLE

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for videos & test results

High-Pile Carpet Pickup Post Test  

iRobot Roomba S9 High-Pile Carpet Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 High-Pile Carpet Pickup Post Test Sample

SAMPLE

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Show Text 

High-Pile Carpet Performance 
 

N/A
N/A

Setting Used  

Locked

High Carpet Large Debris Graph  

iRobot Roomba S9 High Carpet Large Debris Graph Sample

SAMPLE

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iRobot Roomba 981 High Carpet Large Debris Graph Sample

SAMPLE

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Large Debris at 0 gal (0L)  

Lock%

Large Debris at 0.07 gal (0.25L)  

Lock%

Large Debris at 0.2 gal (0.75L)  

N/A

Large Debris at 0.4 gal (1.5L)  

N/A

Large Debris at 0.8 gal (3L)  

N/A

Large Debris at 1.6 gal (6L)  

N/A

High Carpet Small Debris Graph  

iRobot Roomba S9 High Carpet Small Debris Graph Sample

SAMPLE

JOIN NOW

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iRobot Roomba 981 High Carpet Small Debris Graph Sample

SAMPLE

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for pictures & test results

Small Debris at 0 gal (0L)  

Lock%

Small Debris at 0.07 gal (0.25L)  

Lock%

Small Debris at 0.2 gal (0.75L)  

N/A

Small Debris at 0.4 gal (1.5L)  

N/A

Small Debris at 0.8 gal (3L)  

N/A

Small Debris at 1.6 gal (6L)  

N/A
Show Text 

Low-Pile Carpet Pickup 
 

N/A
N/A

Low-Pile Carpet Pickup Video  

iRobot Roomba S9 Low-Pile Carpet Pickup Video Sample

SAMPLE

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for videos & test results

iRobot Roomba 981 Low-Pile Carpet Pickup Video Sample

SAMPLE

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for videos & test results

Low-Pile Carpet Pickup Post Test  

iRobot Roomba S9 Low-Pile Carpet Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Low-Pile Carpet Pickup Post Test Sample

SAMPLE

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Show Text 

Pet Hair Floor Performance 
 

N/A
N/A

Pet Hair Graph  

iRobot Roomba S9 Pet Hair Graph Sample

SAMPLE

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for pictures & test results

iRobot Roomba 981 Pet Hair Graph Sample

SAMPLE

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Bare Floor 
 

Lock%

Low-Pile Carpet 
 

Lock%

High-Pile Carpet 
 

Lock%
Show Text 

Pet Hair Pickup 
 

N/A
N/A

Pet Hair Pickup Video  

iRobot Roomba S9 Pet Hair Pickup Video Sample

SAMPLE

JOIN NOW

for videos & test results

iRobot Roomba 981 Pet Hair Pickup Video Sample

SAMPLE

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Pet Hair Pickup Post Test  

iRobot Roomba S9 Pet Hair Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Pet Hair Pickup Post Test Sample

SAMPLE

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Show Text 

Suction 
 

N/A
N/A

Suction Video  

iRobot Roomba S9 Suction Video Sample

SAMPLE

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iRobot Roomba 981 Suction Video Sample

SAMPLE

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Maximum Hose Suction 
 

N/A

Maximum Head Suction 
 

Lock inH₂O (Lock kPa)

Normal Head Suction 
 

Lock inH₂O (Lock kPa)

Setting Used For Normal  

Locked

Hose Diameter 
 

N/A
Show Text 

Airflow 
 

N/A
N/A

Maximum Airflow Video  

iRobot Roomba S9 Maximum Airflow Video Sample

SAMPLE

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iRobot Roomba 981 Maximum Airflow Video Sample

SAMPLE

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Maximum Head Airflow 
 

Lock CFM (Lock m³/min)
Lock CFM (Lock m³/min)
Show Text 

Noise 
 

N/A
N/A

Noise Video 
 

iRobot Roomba S9 Noise Video Sample

SAMPLE

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iRobot Roomba 981 Noise Video Sample

SAMPLE

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Bare Floor 
 

Lock dBA
Lock dBA

Low-Pile Carpet 
 

Lock dBA
Lock dBA
Show Text 

Household Adaptability 
 

N/A
N/A

Household Adaptability  

iRobot Roomba S9 Household Adaptability Sample

SAMPLE

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iRobot Roomba 981 Household Adaptability Sample

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Show Text 

Pet Hair Furniture Performance 
 

N/A
N/A

Sofa Pickup Video  

iRobot Roomba S9 Sofa Pickup Video Sample

SAMPLE

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iRobot Roomba 981 Sofa Pickup Video Sample

SAMPLE

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Sofa Pickup Post Test  

iRobot Roomba S9 Sofa Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Sofa Pickup Post Test Sample

SAMPLE

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Obstacle Avoidance 
 

N/A
N/A

Obstacle Avoidance Technology 
 

Locked

Object Recognition 
 

Locked

Obstacle Video  

iRobot Roomba S9 Obstacle Video Sample

SAMPLE

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iRobot Roomba 981 Obstacle Video Sample

SAMPLE

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Bare Floor: Avoidance Rate 
 

Lock%

Bare Floor: Intervention Rate 
 

Lock%

Carpet: Avoidance Rate 
 

Lock%

Carpet: Intervention Rate 
 

Lock%

Always Avoided Pet Waste 
 

Locked

Height Clearance 
 

N/A
N/A

Height Clearance Video  

iRobot Roomba S9 Height Clearance Video Sample

SAMPLE

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iRobot Roomba 981 Height Clearance Video Sample

SAMPLE

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Lowest Height Cleared 
 

Locked

Threshold Clearance 
 

N/A
N/A

Low Threshold Video  

iRobot Roomba S9 Low Threshold Video Sample

SAMPLE

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for videos & test results

iRobot Roomba 981 Low Threshold Video Sample

SAMPLE

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for videos & test results

High Threshold Video  

iRobot Roomba S9 High Threshold Video Sample

SAMPLE

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for videos & test results

iRobot Roomba 981 High Threshold Video Sample

SAMPLE

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Max Threshold Height 
 

Lock cm (Lock")

Air Quality 
 

Sealing Quality Video  

iRobot Roomba S9 Sealing Quality Video Sample

SAMPLE

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iRobot Roomba 981 Sealing Quality Video Sample

SAMPLE

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Anti-Allergy Filter (HEPA) 
 

Locked
Locked
Show Text 

Cracks 
 

N/A
N/A

Cracks Video  

iRobot Roomba S9 Cracks Video Sample

SAMPLE

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iRobot Roomba 981 Cracks Video Sample

SAMPLE

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Wood Cracks Post Test  

iRobot Roomba S9 Wood Cracks Post Test Sample

SAMPLE

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iRobot Roomba 981 Wood Cracks Post Test Sample

SAMPLE

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Show Text 

Stains 
 

N/A
N/A

Stain Video  

iRobot Roomba S9 Stain Video Sample

SAMPLE

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iRobot Roomba 981 Stain Video Sample

SAMPLE

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Stain Pickup Post Test  

iRobot Roomba S9 Stain Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Stain Pickup Post Test Sample

SAMPLE

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Show Text 

Water 
 

N/A
N/A

Wet Compatible 
 

Locked
Locked

Water Video  

iRobot Roomba S9 Water Video Sample

SAMPLE

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iRobot Roomba 981 Water Video Sample

SAMPLE

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Water Pickup Post Test  

iRobot Roomba S9 Water Pickup Post Test Sample

SAMPLE

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iRobot Roomba 981 Water Pickup Post Test Sample

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Show Text 
Automation

Physical Automation 
 

N/A
N/A

Recharge And Resume 
 

Locked

Automatic Recharging 
 

Locked

Automatic Bag Emptying 
 

Locked

Pathing Algorithm 
 

Locked
Locked

Physical Boundary Markers 
 

Locked
Locked

Scheduled Start Buttons 
 

Locked
Locked

Cycle Control Buttons 
 

Locked
Locked

Navigation Control Buttons 
 

Locked
Locked
Show Text 

Companion App Automation 
 

N/A
N/A

Companion App Screen Grabs  

iRobot Roomba S9 Companion App Screen Grabs Sample

SAMPLE

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iRobot Roomba 981 Companion App Screen Grabs Sample

SAMPLE

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App Name 
 

Locked
Locked

Software Boundary Markers (No-Go Zones) 
 

Locked
Locked

App Scheduled Start 
 

Locked
Locked

App Cycle Control 
 

Locked
Locked

Navigation Control Within App 
 

Locked
Locked

iOS Availability 
 

Locked

Android Availability 
 

Locked
Show Text 
To Be Deleted

Check Price

Black
Roomba S9
SEARCH
Amazon.com
Black
Roomba 981
SEE PRICE
Amazon.com
Black
Roomba S9+
SEE PRICE
iRobot
Black
Roomba 980
SEE PRICE
Amazon.com
 
Night Blue
Roomba 981
SEARCH
Amazon.com
Back to Top

iRobot Roomba S9

iRobot Roomba 981

Comments

  1. Comparison
 • Posted 2 years ago

iRobot Roomba S9 vs iRobot Roomba 981: Main Discussion

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