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iRobot Roomba J9 Plus vs iRobot Roomba s9 Plus

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Roomba J9+

Roomba S9+

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Roomba J9+

4 out of 5
Main characteristics:
  • Dimensions 13.3 inches in width x 3.4 inches high
  • Weight 7.5 lbs
  • Available colors 1 (Black/Bronze)
  • Carpet Boost Yes
  • Bin 0.5L Onboard
  • Dirt Detective Yes
View on Amazon

Roomba S9+

3.7 out of 5
Main characteristics:
  • Dimensions 12.25 inches in width x 3.5 inches high
  • Weight 8.15 lbs
  • Available colors 1 (Black/Copper)
  • Carpet Boost Yes
  • Bin 0.5L Onboard
  • Dirt Detective No
View on Amazon

User reviews

Roomba J9+

3.0
2 reviews
5
4
3
2
1

Battery life

Good(2)
Bad(0)
2reviews

User-friendly app

Yes(0)
No(2)
2reviews

Cleaning quality

Good(2)
Bad(0)
2reviews

Carpet cleaning

Good(2)
Bad(0)
2reviews

Good for pet hair

Good(2)
Bad(0)
2reviews

Hard Floors Cleaning

Good(2)
Bad(0)
2reviews

Noise Level

Low(1)
High(1)
2reviews

Navigation

Good(2)
Bad(0)
2reviews

By,Margo

Smarter than other robot vacuums I've had before.

1 week ago

Used for one week, no complaints so far except for the app, which sometimes can't connect to the robot and shows an error. Restarting the app usually fixes it. The robot vacuums well and is genuinely smart, avoiding obstacles like scattered socks and cords in 90% of cases. The design is sleek, and it is a bit noisy, but if you set it to clean after leaving the house, it’s not an issue. Overall, I recommend it; everyone should have THIS in their home, it’s a very good device.

Battery life: Good
User-friendly app: No
Cleaning quality: Good
Carpet cleaning: Good
Good for pet hair: Good
Hard Floors Cleaning: Good
Noise Level: High
Navigation: Good

By,Mariia

Perfect vacuum for pet hair!

1 month ago

No issues with the vacuum itself. It performs its job excellently. However, I will need several more cleaning sessions to figure out the app and map editing—it clumsily or doesn't save recent changes at all, doesn't allow for boundary adjustments, renaming rooms, etc.
Pros
- Effectively cleans pet hair

Cons
- Controlling the robot through the app is not intuitive; it requires patience and perseverance from the "operator."
- It lifts thin rugs, so they need to be removed before use.

Battery life: Good
User-friendly app: No
Cleaning quality: Good
Carpet cleaning: Good
Good for pet hair: Good
Hard Floors Cleaning: Good
Noise Level: Low
Navigation: Good

Roomba S9+

3.3
3 reviews
5
4
3
2
1

Battery life

Good(2)
Bad(1)
3reviews

User-friendly app

Yes(2)
No(1)
3reviews

Cleaning quality

Good(2)
Bad(1)
3reviews

Carpet cleaning

Good(2)
Bad(1)
3reviews

Good for pet hair

Good(2)
Bad(1)
3reviews

Hard Floors Cleaning

Good(1)
Bad(1)
2reviews

Noise Level

Low(1)
High(2)
3reviews

Navigation

Good(2)
Bad(1)
3reviews

By,Mike

I got it for the self-cleaning feature and the scheduling. A gift for my wife.

1 week ago

The first 5 cleanings went without any issues. After that, it stops at unpredictable moments and places, showing a red light with Error 31, and no actions from the app help fix it. Resets, factory resets—nothing works. It runs for 5 minutes and then stops with this error. With each attempt to fix it, the interval before it stops gets shorter. Money wasted! :(

Battery life: Bad
User-friendly app: No
Cleaning quality: Bad
Carpet cleaning: Bad
Good for pet hair: Bad
Hard Floors Cleaning: Bad
Noise Level: High
Navigation: Bad

By,Milana

Smart, easy to use, low noise level, can be used on any surfaces.

2 months ago

The vacuum collects dust and small debris from any surface. It automatically detects the level of dirt and remembers the furniture layout. The device is genuinely smart and useful. It is easy to control via a smartphone. For convenience, you can create a cleaning schedule. The side brushes make the cleaning result perfect. I haven't noticed any drawbacks yet. The dustbin is small, but the vacuum empties itself. For our studio apartment, this model is the ideal option. It performs a couple of cleanings without needing a recharge. It doesn't overheat or malfunction.

Battery life: Good
User-friendly app: Yes
Cleaning quality: Good
Carpet cleaning: Good
Good for pet hair: Good
Hard Floors Cleaning: Good
Noise Level: Low
Navigation: Good

By,Julia Minson

I think Roomba S9+ the best model today.... but

12 months ago

The Roomba S9+ offers a high-quality cleaning experience with good battery life and impressive carpet cleaning, even adept at tackling pet hair. The cleaning quality is top-notch and the user-friendly app enhances ease of use. However, it has a high noise level, which can be disruptive. The navigation is generally good, although it occasionally struggles with darker rugs. Despite minor drawbacks, its performance and convenience make it a worthwhile investment for those seeking a hands-off approach to maintaining a clean home.

Battery life: Good
User-friendly app: Yes
Cleaning quality: Good
Carpet cleaning: Good
Good for pet hair: Good
Noise Level: High
Navigation: Good


In today’s review, I will compare Roomba j9/j9+ and S9/S9+ to find out whether the newer J9 can match the older S9.

There’s no doubt Roomba is the most popular robot brand, boasting the latest innovations and guaranteeing reliability, unlike many cheap brands out there. Recently, the company released a new 9th gen model, the J9, which many are confusing with the S9 from the S series.

You may be wondering what model offers the best value for money.

You are not alone, as this is among the raging debates on many Roomba threads on Reddit.
I will compare the two so we can find out which is the best bang for the buck.

Check Price

iRobot Roomba j9+
Black
iRobot Roomba s9+
Black

Roomba J9 vs S9 Face-To-Face Comparison Table

ParameterRoomba J9Roomba S9
Design, Dimensions, and Aesthetics
Shaperound-shaped D-shape
ColorWhite and grayBlack and gold
Dimensions (L x W x H)13.3 x 12.8 x 3.5 inches12.25 x 12.25 x 3.5 inches
Weight7.5 lbs8.15 lbs
Cleaning Orientation
Cleaning Path Width7 inches7.25 inches
Carpet PerformanceHighExcellent
Hard Floor PerformanceExcellentExcellent
Edge CleaningGoodExcellent
Pet Hair CleaningVery GoodExcellent
Vacuuming Performance
Suction Power10x power-lifting suction40x power-lifting suction
Adjustable Suction LevelsYesYes
Noise Level65-70 dB60-65 dB
Mopping Performance
Mopping CapabilityNoNo
Navigation
Navigation TechnologyiAdapt 3.0 with vSLAMiAdapt 3.0 with vSLAM
Obstacle DetectionAdvancedAdvanced
Climb Threshold0.8 inches0.79 inches
Mapping
Mapping TechnologyImprint Smart MappingImprint Smart Mapping
Room SelectYesYes
No-Go ZonesYesYes
Multi-floor MappingYesYes
Filtration
Filter TypeHigh-Efficiency FilterHigh-Efficiency Filter
HEPA FilterNoNo
Brush System
Main Brush TypeDual Multi-Surface Rubber BrushesDual Multi-Surface Rubber Brushes
Side Brushes11
Anti-Tangle TechnologyYesYes
Bin System
Bin Capacity0.5 liters0.55 liters
Auto-Dirt DisposalCompatible (Clean Base)Compatible (Clean Base)
Battery and Runtime
Battery TypeLithium-ionLithium-ion
Runtime90 minutes120 minutes
Charging Time3 hours2 hours
Auto Recharge and ResumeYesYes
Automation and Smart Features
Wi-Fi ConnectivityYesYes
App ControlYesYes
Voice ControlAmazon Alexa, Google AssistantAmazon Alexa, Google Assistant
SchedulingYesYes
Smart Home IntegrationYesYes
Warranty & Aftersales
Warranty Period1 year1 year
Customer SupportPhone, Email, ChatPhone, Email, Chat
Spare Parts AvailabilityReadily availableReadily available

Cleaning Tests:

Vacuuming Test on Hardwood Floor

10/10
9/10

Vacuuming Test on Hardwood Floor

  • Pet hair
  • 99%
  • 98%
  • Sand pebbles
  • 99%
  • 99%
  • Flour
  • 99%
  • 98%
  • Sugar
  • 99%
  • 99%
  • Rice
  • 99%
  • 99%
  • Coffee
  • 99%
  • 98%
  • Popcorn
  • 99%
  • 99%
  • Cheerios
  • 99%
  • 99%
  • Kitty litter
  • 99%
  • 99%

Vacuuming Test on High Pile Carpet

9/10
8/10

Vacuuming Test on High Pile Carpet

  • Pet hair
  • 98%
  • 97%
  • Sand pebbles
  • 99%
  • 98%
  • Flour
  • 97%
  • 95%
  • Sugar
  • 99%
  • 97%
  • Rice
  • 99%
  • 98%
  • Coffee
  • 98%
  • 96%
  • Popcorn
  • 99%
  • 98%
  • Cheerios
  • 99%
  • 98%
  • Kitty Litter
  • 99%
  • 97%

Check Price

iRobot Roomba j9+
Black
iRobot Roomba s9+
Black

Frequently Asked Questions

1. What is the difference between Roomba J9 and Combo J9?

The two are quite similar, save for the fact that the J9 doesn’t have a mopping function, whereas the J9 Combo can vacuum and mop.

FAQ

2. Does the Roomba S9 clean in the dark?

Nothing can stop the Roomba from cleaning in the dark, but now that it doesn’t have a front LED like the J9, expect it to have compromised obstacle detection in those dark spots.

3. Is the Roomba j9 worth it?

The J9 is worth every penny, considering it vacuums, mops, self-empties, and self-refills the water tank. Besides, obstacle avoidance is also a notch higher.

Wrapping Up

Indeed, Roomba is a top brand with high-end robot vacuums that guarantee excellent multisurface cleaning performance. Now, having come to the end of this comparison review, it’s time I declare the winner.

Well, I like the S9 as it has been my reliable cleaning partner for 4 years and counting. It has been reliable in vacuuming my hardwood floor while leaving no scratches or damage and has been effective in picking up pet hair and other daily dirt and debris. It also has better edge and baseboard cleaning and a longer runtime. However, if you want better navigation and obstacle avoidance, the J9 is a great deal as it features PrecisionVision.

Check other comparisons

RP

Very Nice review. Thanks very much, for the comparison. Isn’t it Ironic that this type of comparison is not found on the iRobot.com site?

Also why is Roomba still using bags?!?! in its base? The Vacuum world is moving fast forward to bagless. But the constant need to have continued revenue must be the driving force to keep bags alive.

Esteban Zagrodnik

There is noticeably a bundle to learn about this. I assume you made specific nice points in features also.

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