Frequently Asked Questions

Why are there so many Roomba models?

iRobot offers different models at various price points with distinct features, similar to minivan trim levels. Base models clean floors, mid-range ones clean and avoid messes, and high-end ones empty themselves.

Which Roomba is best for a family with pets and kids?

The i3 or i4 series is the sweet spot—they have smart mapping, row-by-row cleaning, and stronger suction. Avoid the Essential line if you have a golden retriever, as it lacks object avoidance and will eat charging cables.

What’s the difference between the i3 and i4 Roombas?

The i4 has a larger battery, so it can clean more of a big house on a single charge. Otherwise, they have the same smart navigation and suction.

Is the self-emptying dock worth the extra cost?

The self-emptying dock adds about $200 to the price. It’s worth it if you don’t want to empty the bin yourself, but not necessary for everyone.

The Roomba Lineup: Why So Many & Which One’s Right

Every few weeks I get a text from a friend or a cousin or that dad from soccer practice that starts the same way: “Hey, I’m looking at Roombas and there are like twelve different ones. What’s the deal?” And I get it. iRobot has made an already confusing category even more confusing by releasing model after model with names that sound like robot serial numbers. The j7. The i3. The s9. The Combo j9 Plus. It feels like they just pull letters out of a hat. But after testing seven different Roombas in a house with two kids, a shedding golden retriever, and a cat that thinks he’s a Roomba, I can tell you there’s actually a method to the madness. And no, you don’t need the most expensive one.

Why So Many Models?

Here’s the honest truth: iRobot isn’t trying to confuse you. They’re trying to give you options at different price points with different feature sets. Think of it like buying a minivan. They all get you from point A to point B. But one might have heated seats, another might have a better navigation system, and a third might just be reliable and cheap. Same thing here. The base models clean floors. The mid-range models clean floors and avoid messes. The high-end models clean floors, avoid messes, empty themselves, and probably apologize when they bump into your furniture.

Sparkles walked into the living room while I was testing the Combo j9 Plus one afternoon and said, “Dad, why does that one have a tail?” She was pointing at the self-emptying dock. That’s the biggest differentiator: do you want to empty the bin yourself, or do you want the robot to do it for you? That one feature alone jumps the price by two hundred bucks. And for some people it’s worth every penny.

There are basically four families right now: the Essential line (formerly the 600 series), the i3 and i4 series, the j7 series, and the s9 series. Plus the Combo variants that can mop. I’ve owned or tested every single one.

The Essential Line

This is your no-frills Roomba. No smart mapping. No camera. No self-emptying. It bumps into things, changes direction, and eventually covers the room if you give it enough time. It’s loud, it doesn’t avoid pet accidents, and it will eat a charging cable without remorse. But it costs under 300 bucks and it works. If you have a small apartment with hardwood floors and no pets, this is fine. If you have kids and a golden retriever, you will want to punch it within a week.

The i3 and i4 Series

These are the sweet spot for most families. They have smart navigation that learns your floor plan. They clean in rows instead of wandering randomly. They have stronger suction than the Essential line. And they work with the self-emptying dock if you want it. The i4 is basically the same as the i3 but with a larger battery, which matters if you have a big house. I put an i4 in my downstairs and it does the whole first floor on a single charge. It still doesn’t have a camera, so it won’t recognize specific objects like shoes or phone chargers, but it will avoid common obstacles like cords and rugs.

The j7 Series

This is the one I tell most parents to buy. The j7 has a front-facing camera that can actually identify objects. So if your kid leaves a pair of Legos on the floor, the j7 sees them and drives around them. It will not eat a Power Ranger. It will not get tangled in a headphone cord. It will send you a photo of whatever it avoided so you can laugh or yell at your children. Sparkles named ours “Detective Fluffy” because she saw it send a photo of her missing sock to my phone. The j7 also has better dirt detection, so it will spend extra time on areas that are actually dirty rather than just cruising past. This is the Roomba that made me stop being annoyed by my own life.

The s9 Series

The s9 is the top dog. It’s shaped differently, with a D-shape that lets it get into corners better than the round models. It has the strongest suction across the board. It navigates faster. It empties itself more aggressively. And it costs about twice as much as the j7. I own an s9 in my upstairs because I have wall-to-wall carpet and a dog that likes to roll in mud. It’s objectively the best. But you have to decide if you need the best or if you just need a clean floor.

Who It’s For

If you’re a first-time buyer, start with the j7. It’s not the cheapest but it’s the one that will make you actually trust the robot. If you’re on a budget, get the i3 and empty the bin yourself. If you have wall-to-wall carpet everywhere and a heavy shedding dog, spring for the s9. If you have all hard floors and no kids, the Essential line is fine and you can spend the savings on something else.

Do not buy a model that doesn’t have smart mapping. I’ve seen too many parents buy the cheapest Roomba and then text me two months later asking why it still misses half the kitchen. You need the map. You need the robot to know where the dining room is versus the living room. Without that, it’s just a expensive bumper car.

Pros & Cons

Pros

  • Smart mapping changes everything. The i3, j7, and s9 all learn your home and let you set no-go zones, schedule specific rooms, and send the robot to a specific mess from your phone.
  • The j7’s object detection is amazing for parents. Legos, socks, cords, pet toys, all avoided.
  • Self-emptying docks mean you go weeks without touching the robot. If that’s worth extra money to you, get it.
  • Suction has improved drastically. The i3 and up handle pet hair and Cheerio crumbs without issue.
  • All of them work with voice assistants and the iRobot app is solid.

Cons

  • The Essential and i3 series still get tangled in cords and fringe on rugs. The j7 and s9 are much better but not perfect.
  • None of them handle pet accidents. If your dog has an accident on the carpet, do not run the Roomba. You will have a disaster.
  • Mopping on the Combo models is fine for light maintenance but don’t expect to replace your Swiffer for deep cleaning.
  • The s9 is expensive. Really expensive. You have to decide if the corner cleaning and extra suction are worth it.
  • All Roombas are louder than many competitors, especially during self-emptying. It sounds like a jet engine for ten seconds.

Verdict

Buy the Roomba j7 or j7 Plus. That’s the one I recommend to every parent who asks. It avoids the messes you’ve already accepted in your life. It learns your home. It empties itself if you pay for the Plus version. And it won’t destroy your kids’ things. If you have a huge house with lots of carpet, step up to the s9. If you’re trying to stay under 300 bucks, get the i3 and accept that you’ll still need to rescue it from a charging cable every once in a while. But don’t buy the cheapest one thinking you’ll save money. You’ll just end up frustrated and then buy the j7 anyway. Trust me. I’ve watched that exact story play out seven times now.