iRobot Roomba j9
No store we follow ships this model to the United States. This page says what it can do, and which similar robots you can buy here.
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Before you buy, compare it with 2 recommended alternatives
No store here sells this model today, so beside it the highest-scored model with the same kind of station that one does, and the cheapest of the top 10.
Green is the best of these 3, also when they share the lead.
| This model iRobot Roomba j9 Best on 1 fact | Cheapest of the top 10 Roborock Q7 L5 Best on 1 fact | Highest score here Roborock Q7 M5 Best on 1 fact | |
|---|---|---|---|
| Price and ranking | |||
| Lowest price | – | $129Roborock (brand store) best | $149Roborock (brand store) |
| Score | not in our ranking | best | |
| Rank | – | rank 2 of 6 without a station | rank 1 of 6 without a station |
| Customer rating | – | ★ 4.0 · 16,618 reviews | ★ 4.0 · 5,617 reviews |
| Mopping | |||
| Mop type | no mop | flat or vibrating pad | flat or vibrating pad |
| Mop lift on carpet higher is better | – | – | no |
| Automatic mop detach | – | – | no |
| Washes the mop | – | no | no |
| Hot-air drying | – | no | no |
| Station | |||
| Station same on all | charging dock only | charging dock only | charging dock only |
| Dust bag lasts longer is better | – | – | up to 30 days |
| Plumbing hookup | – | no | no |
| Brush and obstacles | |||
| Anti-tangle brush same on all | yes | yes | yes |
| Obstacle avoidance | AI camera | – | – |
| Climbs thresholds up to higher is better | – | 0.8 in (20 mm) | 0.8 in (20 mm) |
| Climbing system for high thresholds | – | – | no |
| Size, noise and age | |||
| Robot height lower is better | 3.4 in (8.7 cm) best | 3.9 in (9.9 cm) | 3.9 in (9.9 cm) |
| Noise not judged | – | – | 65 dB |
| On the market since | – | January 2025 | April 2025 |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.
iRobot Roomba j9 specifications
The numbers that matter first, then every fact by group. As published by the maker or the store we read it from.
Dimensionsrobot and dock
From the published dimensions. The robot passes under furniture with 3.5 in of clearance or more.
Suction and brushes 3 facts
- Anti-tangle brush
A brush that guides hair to the side instead of letting it wind around the shaft. It saves the cutting work in homes with long hair or pets.
- yes
- Carpet detection
The robot notices when it drives onto a carpet. Most then raise their suction, and a mopping robot lifts its mop or leaves it at the dock.
- detects carpet and boosts suction
- Dirt detection
A sensor notices where more dirt lies, at the doormat for example, and the robot cleans that patch longer or a second time.
- yes
Mopping 1 fact
- Mop type
How the mop is built: flat pads, two spinning discs or a roller. Discs press harder on dried-on dirt, a roller rinses itself while it works.
- no mop
Dock 1 fact
- Empties the dust bin
The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin.
- no
Navigation and obstacles 4 facts
- Obstacle avoidance
How the robot sees loose things on the floor, such as cables, socks or a pet accident. A camera with depth sensing sees more than a bumper that reacts on contact.
- AI camera
- No-go zones
How you keep the robot out of a place: a zone you draw in the app, a virtual wall or a magnetic strip on the floor.
- zones in the app
- Room-by-room cleaning
You pick one or more rooms on the map in the app, and the robot cleans only those.
- yes
- Avoids pet waste
The maker says the robot recognizes a pet accident and drives around it, so it does not smear it across the floor. This is the maker’s claim, not a test of ours.
- yes
Robot 3 facts
- Robot height
How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.
- 3.4 in (8.7 cm)
- Robot diameter
How wide the robot is. Narrower gets between chair legs more easily, wider usually means a bigger dust bin.
- 13.3 in (33.9 cm)
- Robot weight
What the robot weighs. It counts most if you carry it up a staircase every day.
- 7 lb (3.18 kg)
Battery 2 facts
- Battery capacity
The capacity of the battery. It hints at the runtime, but how much the robot draws counts just as much.
- 4,460 mAh
- Runtime per charge
How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped.
- 175 min
Smart features and warranty 3 facts
- Voice assistants
Which voice assistants the robot works with, such as Google Assistant or Alexa.
- Alexa, Google Assistant, Siri
- Warranty
The warranty the maker gives in the United States.
- 2 years
- Wi-Fi band
Which Wi-Fi the robot connects to. Many robots only use 2.4 GHz, so check that your router still broadcasts it.
- 2.4 and 5 GHz
Sources: homesupport.irobot.com · irobot.nl
Frequently asked questions about the iRobot Roomba j9
Does the iRobot Roomba j9 empty its own dust bin?
No, you empty the robot’s dust bin yourself.
Can the iRobot Roomba j9 mop?
No, this model only vacuums.
Does the iRobot Roomba j9 work with Alexa, Google Home or Siri?
It works with Alexa, Google Assistant and Siri.
Does the iRobot Roomba j9 fit under low furniture?
The robot is 3.4 in (8.7 cm) tall, so it fits under furniture with at least 3.5 in of clearance.
How long does the iRobot Roomba j9 run on one charge?
175 minutes on its quietest setting.
How much warranty does the maker give on the iRobot Roomba j9?
2 years in the United States. Your statutory rights are separate and can last longer.