Roomba i3 vs i7 and i3+ vs i7+ Comparison Review

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The Roomba i3 and i3+ are iRobot’s latest entries in their robust lineup of robot vacuums, but how does it compare to the current models out there? I compare the Roomba i3 vs i7 and i3+ vs i7+ in this matchup of the new guy against the popular Roomba i7 and i7+. 

The Roomba i7+ and base i7 were instant hits as the start for many smart homes when they came out on the market. They brought with them smart features that made our lives more convenient and automated when it comes to keeping our floors clean. 

But the Roomba i3+ and i3 bring with it many of the same features and benefits. So what are the similarities and differences of the i3 vs i7 and i3+ vs i7+, and which one offers the better value for your money?

If you’re in a hurry, the Roomba i3/i3+ is the best bang for your buck in this matchup comparison, but not by much. It was a tight race because the i7/i7+ does have something that the i3 doesn’t have. Read more below to see what the i7/i7+ has that could make it a better option for you. 

iRobot Roomba i3+ (3550) Robot Vacuum with Automatic Dirt Disposal Disposal...
  • INTRODUCING - The new Roomba i3+ Robot Vacuum. Takes cleaning off your mind, and your to-do list, for months at a time.
  • CLEANS UP AFTER YOU, AND ITSELF - Forget about vacuuming for months at a time with the CLEAN BASE Automatic Dirt Disposal that allows the i3+ to empty itself for up to 60 days. AllergenLock Bags capture and trap 99% of pollen and mold.

Last update on 2020-10-29 / Affiliate links / Images from Amazon Product Advertising API

On Sale
iRobot Roomba i7+ (7550) Robot Vacuum with Automatic Dirt Disposal-Empties...
  • CLEANS UP AFTER YOU, AND ITSELF - Forget about vacuuming for months at a time with the CLEAN BASE Automatic Dirt Disposal that allows the i7+ to empty itself for up to 60 days. AllergenLock Bags capture and trap 99% of pollen and mold.
  • POWERFUL PERFORMANCE & POWERFUL PICK-UP - Pulls in stubborn dirt & messes with a Premium 3-Stage Cleaning System & 10X the Power-Lifting Suction.

Last update on 2020-10-29 / Affiliate links / Images from Amazon Product Advertising API

The Roomba i3, i3+, i7, are i7+ are at the top of the best Roomba models list. Let’s get into the details of what makes these two robovacs great. 

Roomba i3+ vs i7+ Features 

Plus Features – Clean Base and Self-Empty

Let’s start off with this before getting into the details of the features. The Plus model of both the Roomba i3 and i7 signifies that they come with the Clean Base Automatic Dirt Disposal docking station. 

The Clean Base is the self emptying feature that both the i3+ and i7+ have, but the base models i3 and i7 do not have. If you’re more budget conscious and paying for the Plus model right now is difficult, don’t worry. 

You can purchase the Clean Base unit at a later date to pair with your base model. You then have the Plus model, i3+ and i7+, for hands-off, automated cleaning for up to 60 days. 

iRobot Unveils Roomba® i3+ Robot Vacuum

When the Clean Base bags are full, you’ll get a notification on the app or the LED indicator on the Clean Base will light a solid red color. 

As you can see, the robot vacuums between the base model and the Plus model are the same. The only difference between them is the Clean Base station. 

Size Dimensions and Weight

The Roomba i7 and i7 plus measure in at 13.31” wide and 3.62” tall, and weigh 7.28 lbs. That’s similar to the majority of the circular Roomba models. 

The Roomba i3 and i3 plus are 13.26 inches wide by 3.63 inches tall, and weigh 7.44 lbs. Both weigh just a tad more than the i7/i7+ and are slightly smaller, but only by 0.05 inches. 

Battery and Capacity 

The i3 and i7 batteries are lithium-ion for efficient charging and use. They both have the Recharge and Resume feature that allows them to automatically Recharge when they’re running low on battery in the middle of cleaning. 

Once it’s done recharging in about 1.5-2 hours, they’ll Resume cleaning from where they left off. 

The biggest benefit of Recharge and Resume is you don’t need to be at home while the Roomba cleans. Even if you were at home, you can relax knowing that your i3/i3+ and i7/i7+ will go back to cleaning automatically. 

If you get the i3+ or i7+, you really don’t have to worry about either for up to 60 days. Whenever the Clean Base unit is full, you’ll need to empty the dirt bags. 

Cleaning Technology System and Suction Power 

The Roomba i3/i3+ and i7/i7+ both have iRobot’s well-known, Premium 3-Stage Cleaning System for optimal cleaning. Pair that with the 10x suction power of the Roomba 600 series and you have two great cleaning robots. 

These two Roomba’s also have iRobot’s patented Dirt Detect Technology to find those dirtier areas in your house. The sensors will recognize more dirt and run over those areas more to ensure it’s clean. 

Dual Brush Rollers and Edge Sweeping Brush

Both the i3 and i7 have iRobot’s patented multi-surface rubber brushes. These rubber brush rollers are great for home with pets because they won’t get entangled with pet hair easily. If you have bristle type of rollers like other robot vacuum brands, you’ll need to regularly untangle pet hair from the brushes. 

The brush rollers will also adjust to the varying floor heights of carpet and rugs to pull in debris, dirt, and pet hair. You don’t need to worry about cleaning efficiency on different surfaces like hardwood floors, tiles, and carpet. 

iRobot Roomba i3 vs i3+ and i3 vs i7 3 Stage Cleaning

The biggest trouble they’ll have is with high-pile carpet and rugs. That’s trouble for all robot vacuums and the best I’ve seen to deal with the high-pile carpet is the s9 and s9+ due to its suction power. 

Both have an Edge-Sweeping Brush to get the edges along the wall and into the corners. The circular shape does prevent getting as deep into the corners like the Roomba s9 and s9+, but the i3 and i7 still do great jobs cleaning. 


High-Efficiency Filters are standard in the i3/i3+ and i7/i7+ to trap 99% of dust, dirt, dust mites, and allergens. 

If you have cats and/or dogs at home, you might know about the allergens they kick up that set off your allergies. These Roomba models will trap the allergens when cleaning to help prevent or at least minimize allergic reactions. 

Navigation and Mapping

Finally getting to some differences between the Roomba i3 and i7. 

The Roomba i3 and i3+ come with iAdapt 2.0 Smart Navigation, so the camera sensors will map where it’s been for the current cleaning session, but will not remember the map for future use. 

The i7 and i7+ have iAdapt 3.0 Smart Navigation and Imprint Smart Mapping. Smart Mapping is a great feature that allows you to use the iRobot Home App to schedule cleanings for specific parts of the house. 

It also allows you to tell Roomba to avoid certain parts of the house by drawing Keep Out Zones in the app. It’s great if you don’t want the i7/i7+ to clean around fragile items. 

The i3 and i7 both have intelligent navigation tracking sensors that help them clean efficiently. You’ll see them clean in neat rows, instead of the seemingly random directions that older and lower-priced models do. 

They both have Reactive Sensor Technology to avoid furniture and other obstacles, so they won’t get stuck under or in-between furniture. You still might get light bumps against furniture and walls, but they’re light bumps. 

iRobot has their Braava Jet robots with automated mopping and with mapping functionalities of both the i3 and i7, they’re able to pass on where they’ve cleaned to the Braava. That means when your i3 or i7 is done picking up the dirt in certain areas, the Braava will know that those areas can be mopped. Genius! 

Speaking of Genius…

iRobot Home App Powered by iRobot Genius

The iRobot Home App powered by iRobot Genius is an upgraded, redesigned app to bring personalization options and customizations to cleaning. 

Based on your cleaning habits and the past cleaning experiences that the Roombas have had, the Home App will now make suggestions on cleaning schedules. These recommendations are all tailored to your unique needs and situation. 

They’ll suggest how often it should clean and where to clean because they’ll have the data to know how often it needs to get out on the floor to keep your home clean. It even knows when it’s allerg season and if you have allergies, it’ll suggest more cleaning sessions. 

Experience clean in a whole new way | iRobot® Home App | Amazon Alexa & Google Home | iRobot®

iRobot Genius also brings with it smart home integrations and better voice command control with voice assistants like Amazon Alexa and Google Home.

Integration and compatibility with smart home devices is a great step to get that full-on smart home automation that’s making our lives more convenient. You can create cleaning routines using the IFTTT platform or through wireless protocols, like WiFi or Z-Wave, depending on your smart home setup. 

Connect to smart thermostats and smart locks, and create triggers for when the Roomba should clean. Left the house? Roomba can start cleaning, so when you come home to clean floors. 

Roomba i3 vs i3+ Pros and Cons


  • Great, similar i7/i7+ features at an affordable price
  • Smart home integration possibilities
  • iRobot Genius Home App personalized suggestions


  • Doesn’t have Smart Mapping for future cleaning and creating Keep Out Zones

Roomba i7 vs i7+ Pros and Cons


  • Has all of the best features in the complete Roomba lineup
  • Smart home integration
  • Personalization from the iRobot Home App
  • Smart Mapping and Keep Out Zone


  • Higher-priced 

Roomba i3 vs i7 Final Thoughts

In the Roomba i3 vs i7 and Roomba i3+ vs i7+ comparisons, they’re both very similar. The main difference between them is the Smart Mapping functionality. It’s not an easy decision to pick one over the other because it depends on the individual and what their budget is. To me…

The Roomba i3+ is the better choice for most people out there. It has all the needed features and functions to keep the house clean, while allowing you to enjoy an automated cleaning experience. 

Last update on 2020-10-29 / Affiliate links / Images from Amazon Product Advertising API

Last update on 2020-10-29 / Affiliate links / Images from Amazon Product Advertising API

If you do have room for a higher budget, the i7+ will give you better control over your cleaning, including spot cleaning. Spot clean control will be very helpful if you only need to clean certain areas, like the kitchen after your kids make breakfast. 

Bottom line, you can’t go wrong with either of these great Roomba vacuums. 

Frequently Asked Questions (FAQ)

iRobot Roomba i6+ vs i7+ Differences

The Roomba i6+ and i7+ (i6 vs i7) are the same robot vacuum when it comes to the features and technical specs. The key difference is where they’re for sale. The i6+ sells exclusively on and the i7+ as the base model is for sale on Amazon and many other retailers.

iRobot Roomba i8+ vs i7+ Differences

The Roomba i8+ is Costco’s version of the Roomba i7+ available in many online and offline retailers. The key difference is Costco’s i8+ has a slightly larger battery and longer runtime of about 15 min. But both models have Recharge and Resume, so the battery and runtime don’t make much of a difference when it comes to cleaning.

iRobot i4 vs i3 Differences

The Costco version of the Roomba i3 is named the Roomba i4 (4150) and the i4 does not self-empty. It’s unclear as I write this if Costco will ever have the Plus self-emptying version with the Clean Base Automatic Dirt Disposal docking station. You might want to get the more universal Roomba i3+ on Amazon to be safe if you want the self-emptying feature to take advantage of Recharge and Resume, which will give you a more hands-off cleaning robot vacuum.