Robot Vacuums

Here’s the difference between these three iRobot Roomba models

Is the i3+, the i6+, or the i7+ best for you?

Here are the differences between the i3+, i6+, and the i7+ Credit: iRobot

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iRobot’s Roomba lineup ranks among the most popular robot vacuum models on the market. We’ve tested many of them here at the Reviewed labs, and they consistently score well on our best robot vacuums list.

There are over a dozen bearing the Roomba moniker, so as a consumer, it can be difficult to recognize the differences and nuances between them.

Here, we’ll focus on breaking down iRobot’s most recent batch: the Roomba i3+, Roomba i6+, and the Roomba i7+. What you learn may surprise you.

What does the + mean?

Charging base comparison
Credit: Reviewed / Jonathan Chan

The + means you get a charging base that empties your Roomba for you. It's much bigger than your average dock.

If you visit iRobot’s website, you’ll find that the robot vacuum brand offers both the Roomba i3 and the Roomba i3+ for sale. The major difference between the plus and non-plus version is in its charging base.

The plus versions boast a self-emptying feature. Basically, the charging base contains a built-in vacuum that suctions out the robot’s dirt bin, moving the waste into a sealed bag. This means you never have to get your hands dirty or smell anything gross. Each bag can hold up to 30 days’ worth of dust and debris.

The long and short of the Roomba i3+

iRobot Roomba i3+ Top
Credit: Reviewed / Jonathan Chan

The textured top of the i3+ helps keep it looking tidy.

Advantages: More affordable, won’t get scuffed
Disadvantages: Weaker smart features
Ideal buyer: People who live in small homes or apartments

The i3+ is the most affordable of these three Roombas, with a sale price of around $549.99. On the testing course in Reviewed’s lab, the Roomba i3+ picked up an average of 11 grams of dirt per run. Numbers like this place it in the top tier of robot vacuums we’ve ever tested.

The Roomba i3+ also has the advantage of having a textured chassis—the top is covered in a pattern that’ll hide dirt and scratches for years to come. A lot of robot vacuums with shiny bodies tend to look worse for wear after a few runs.

The Roomba i3+’s major downside is that it has access to fewer smart features, compared with the other two models. It lacks virtual mapping technology and the virtual barrier system, so you are not able to tell the Roomba i3+ to clean specific areas or avoid certain rooms.

Read our full review of the iRobot Roomba i3+

The long and short of the Roomba i6+

iRobot Roomba i6+
Credit: Reviewed / Jonathan Chan

The i6+ is an Amazon-exclusive model.

Advantages: On sale at Amazon often, excellent smart features
Disadvantages: Expensive, no extra goodies
Ideal buyer: Amazon Prime members when its on sale

The Roomba i6+ is an Amazon exclusive. After spending a week using it, we can conclude that it’s basically the Roomba i7+, just with fewer extras included in the box.

The Roomba i6+ has the same superior dirt pickup as the i7+, collecting an average of 10.45 grams of dirt per run on our robot vacuum obstacle course. Stats like this make it one of the best robot vacuums on the market. This Roomba also has full access to iRobot’s Home Genius Intelligence app, which gives tons of customization options on where and when you want the unit to clean.

Home Genius App
Credit: Reviewed / Jonathan Chan

The app on the i6+ and i7+ allows you to automate, schedule, and draw virtual walls.


The major downside is that this model doesn’t come with spare filters or extra bags for the charging base, but costs the same as the Roomba i7+. However, you can often find it on sale on Amazon. If you do, it’s definitely worth it.

Read our full review on the iRobot Roomba i6+

The long and short of the Roomba i7+

iRobot Roomba i7+ Luxury
Credit: Reviewed /Jackson Ruckar

The i7+ comes with all the bells and whistles.

Advantages: Great dirt pickup, excellent smart features, extra bags and filters
Disadvantages: Expensive
Ideal buyer: Anyone who wants a luxury robot vacuum

Bar none, iRobot’s Roomba i7+ is the best robot vacuum we’ve ever tested. It has excellent dirt pickup, racking up 10.5 grams of dirt per run. The accompanying app gives you all the bells and whistles. You can do things like tell the Roomba i7+ to clean under the kitchen table after dinner every day or in the atrium when the kids come home from school—it’s a boon for working parents.

While the Roomba i6+ accomplishes as much, the Roomba i7+ comes with two extra disposable bags, an extra filter, and an extra side brush, making this a great value.

Read our full review on the iRobot Roomba i7+

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Prices were accurate at the time this article was published but may change over time.

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