Frequently Asked Questions

Which Roomba model is best for families with kids and pets?

The Roomba j7 Plus is the best choice because its PrecisionVision navigation avoids obstacles like toys, shoes, and pet waste, plus it self-empties and learns your floor plan.

Does the Roomba Combo actually mop well?

The Roomba Combo mops and vacuums in one pass, but the mopping is more of a damp swish than a proper clean, so it is fine for light maintenance but not for sticky kitchen floors.

What makes the Roomba s9 different from other models?

The s9 has a D-shape design for better corner cleaning and the strongest suction of any Roomba, but it is the most expensive and best suited for houses with lots of carpet and corners.

How does the Roomba i3 navigate?

The Roomba i3 uses a camera-based navigation system that bumps into objects to map the room, so it can get lost in furniture-heavy spaces and may run over items like socks.

The Roomba Lineup Explained: Which One Actually Matters

When Sparkles came home from school last week and announced she wanted a robot vacuum for her bedroom, I nearly choked on my coffee. She said she saw one on TV that could “find the dirt and eat it.” I had to explain that no, they don’t actually eat dirt, and yes, I already own three Roomba models. She looked at me like I was the weird one for not immediately buying her one. So here we are. If you are standing in the aisle or scrolling endlessly online trying to figure out which Roomba to buy, let me save you some time. I have tested the i3, the j7, the s9, and the Combo. I have lived with them through muddy shoes, dog hair tumbleweeds, and the aftermath of a seven-year-old’s glitter explosion. I can tell you which one actually matters.

Key Specs and Features

The Roomba lineup looks simple on iRobot’s site but it is more confusing than it should be. Here is the breakdown of the models that actually matter for a normal house.

Roomba i3 and i4 Series

This is the entry-level smart Roomba. It has decent navigation, basic dirt detection, and a self-emptying option if you buy the Plus model. It uses a camera-based navigation system that is fine for open floor plans but can get lost in rooms with lots of furniture. Sparkles named our i3 “Bumper” because it literally bumps into things to figure out the room.

Roomba j7 Series

This is the model that matters for most families. It has PrecisionVision navigation which means it actually sees obstacles like phone chargers, dog poop, and stray shoes. I cannot tell you how many times the i3 ran over a sock and dragged it across the house. The j7 sees the sock and goes around it. It also has a front-facing camera that learns your floor plan. It self-empties with the Clean Base and does not get stuck under the couch every single day.

Roomba s9 Series

This is the flagship model with a D-shape design to get into corners better. It has the strongest suction of any Roomba and better floor mapping. But it is also the most expensive. Unless you have wall-to-wall carpet and a lot of corner space, you probably do not need this one. Sparkles calls it “The Triangle” and says it looks like a slice of pizza.

Roomba Combo Series

This is the newest addition that mops and vacuums in one pass. The mop pad lifts up when it detects carpet so you do not get wet rugs. It is a nice idea but the mopping is more of a damp swish than a proper clean. For light maintenance it is fine. For sticky kitchen floors, you still need a regular mop.

Who It Is For

If you have kids, pets, or just a life that involves dropped cereal and dust bunnies, the Roomba j7 Plus is the one you want. Do not let the fancy s9 or the Combo tempt you. The j7 is smart enough to avoid the chaos that kids and pets leave behind. It will not eat a toy car or get tangled in a charging cable. It learns your house and cleans room by room on a schedule. You can tell it to clean the kitchen after dinner and it will do that without supervision. The i3 is fine if you have a relatively open floor plan and do not leave things on the floor. But honestly, who lives like that? The s9 is for people with large houses and lots of corner carpet. The Combo is for people who really want to believe a robot can mop their floors. It cannot. Not really.

Pros and Cons of the Roomba That Actually Matters (The j7 Plus)

Pros

  • Obstacle avoidance is legit. It sees shoes, cords, and even small toys. I watched it avoid a single Lego piece that Sparkles left out. The i3 would have eaten it.
  • The self-emptying Clean Base is a game changer. I empty the bag once a month. That is it. No more dumping dust bunnies into the trash while sneezing.
  • Floor mapping works well. It learns your home and you can tell it to clean specific rooms or avoid certain areas. No tape strips or virtual walls needed.
  • App control and voice assistant support are solid. You can start a clean from the couch or ask Alexa to do it.
  • Pet hair performance is excellent. I have a golden retriever mix named Gus. The j7 pulls hair off low-pile carpet and hard floors without tangling the brush roll too badly.

Cons

  • It is expensive. The j7 Plus costs more than the i3 Plus and the difference is mostly the obstacle avoidance. But if you have kids and pets, that feature is worth the price.
  • It still struggles with dark rugs and black furniture legs. The camera-based navigation sometimes treats dark surfaces as drop-offs and avoids them. Not a dealbreaker, but annoying.
  • The cleaning is not as deep as a canister vacuum or a Dyson stick. It is a maintenance tool, not a deep cleaner. You still need a corded vacuum for weekly deep cleans, especially on carpets.
  • The mopping version is not great. If you want the Combo j7, lower your expectations for mopping. It is a damp cloth that wipes, not scrubs.
  • It is loud. Not as loud as a full-size vacuum, but louder than you expect. Do not run it while someone is napping.

Verdict with Buy Recommendation

If you are buying your first robot vacuum and you have a family, get the Roomba j7 Plus. Do not overspend on the s9. Do not compromise with the i3. The j7 Plus is the sweet spot where smart navigation meets practical cleaning power. It will keep your floors looking decent most of the time, avoid the landmines of kid life, and empty itself so you can forget about vacuuming for weeks at a time. Sparkles still wants one for her room, but I told her she has to earn it by not leaving Legos on the floor for a whole month. We will see how that goes. In the meantime, the j7 Plus does the job for the whole house and it does it well. Buy with confidence if you have kids or pets. Skip it if you have a very small apartment and no chaos. For everyone else, this is the one that actually matters.