Roomba i3/i3+ vs. j7/j7+ – Detailed Comparison Guide

Last updated on April 15th, 2024

Choosing a Roomba is always a tough decision as there are so many of them to choose from. It is easy to get stuck on having some particular feature but wanting it in your budget. To ease your efforts a little, we are comparing some of the best-selling Roombas, i.e., Roomba i3/i3+ vs. j7/j7+. We will go in-depth about how these models are different from one another.

Which is better: Roomba i3/i3+ vs. j7/j7+?

The Roomba j7+ offers more advanced features such as PrecisionVision Navigation, Imprint Smart Mapping, and P.O.O.P Guarantee. It will be a better choice if you value these advanced capabilities and features. However, if you’re looking for a more budget-friendly option with decent cleaning performance, the Roomba i3+ could still be a good choice.

Read a similar article: Roomba i4 vs. j7- Key Differences & Specifications

What does the ‘+’ indicate?

The ‘+’ in Roomba i3+ and j7+ indicate the inclusion of a self-emptying bin. These models come with a Clean Base docking station, allowing the Roomba to empty its dustbin into a larger dirt disposal bag automatically. This feature eliminates the need for manually emptying the dustbin after each cleaning session. It thus adds to your convenience and reduces maintenance.

Roomba i3/i3+

Roomba i3/i3+ vacuum robots
Roomba i3+

The Roomba i3 and i3+ are two of the most basic Roombas. They have the iAdapt 1.0 navigation technology, which is the very basic smart navigation tech by iRobot. They have a pretty good battery capacity of 1800 mAh, which allows the vacuums to run for 75 minutes. The cleaning performance is really excellent; it matches with some of the higher-end Roombas.

Roomba j7/j7+

Roomba j7 / j7+ vacuum robots
Roomba j7+

The Roomba j7 and j7+ are cutting-edge robotic vacuum cleaners. They feature advanced navigation and mapping capabilities due to their front-facing camera. It can efficiently navigate around small and hard-to-detect obstacles, even pet poop. With its self-emptying bin, the j7+ offers the added convenience of automatically emptying its bin. It gives you a genuinely hands-free cleaning experience.

Roomba i3/i3+ vs. j7/j7+: Specifications

Roomba i3/i3+ vs. j7/j7+ specs
Roomba i3/i3+ vs. j7/j7+ Specs

The table below compares the Roombas side by side.

SpecificationsRoomba i3+Roomba j7+
Dimensions13.3 x 13.3 x 3.6 inches13.3 x 13.3 x 3.4 inches
Weight7.2 Pounds7.49 Pounds
ColorGrey with BlackCharcoal Grey
AvailabilityRefurbished modelsNew models
Surface RecommendationCarpets, Hard FloorsCarpets, Hard Floors
Cleaning OptionsVacuumingVacuuming
Control TypeVoice, AppVoice, App
Compatible DevicesAmazon Alexa,
Google Assistant
Amazon Alexa,
Google Assistant
BrushesDual Multi-Surface
Edge-Sweeping Brush
Dual Multi-Surface
Edge-Sweeping Brush
CameraAbsentFront facing
Dustbin Capacity0.5 L0.5 L
Battery Capacity1800 mAh2210 mAh
Runtime75 mins100 mins
Charging Time2 hours2 hours
Battery TypeLithium IonLithium Ion
Suction Power10x*10x*
Airflow8 CFM8 CFM
Warranty1 year1 year
Automatic Dirt Disposal SystemPresentPresent
Mapping TechnologyPresentPresent
SLAM TechnologyPresentAbsent
vSLAM TechnologyAbsentPresent
PrecisionVision NavigationAbsentPresent
iAdapt 1.0 NavigationPresentAbsent
iAdapt 3.0 NavigationAbsentPresent
No-go ZoneAbsentPresent
Cliff SensorPresentPresent
Hazard DetectionAbsentPresent
3-Stage Cleaning SystemPresentPresent
Dirt Detection TechnologyPresentPresent
Pet Owner Official Promise (P.O.O.P)AbsentPresent
Personalized Cleaning SuggestionsAvailableAvailable
Noise Level65 dB63 dB
Roomba i3/i3+ vs. j7/j7+ Comparison

* indicates comparison with the 600 series

Let’s discuss the differences in these models in detail.


iRobot has discontinued selling the i3+ on its official website. But you can buy refurbished models from websites like Amazon. Now, these i series robots are what you call entry-level robot vacuums. They are on the lower side of the price spectrum. But the Roomba j series models are high-ended robots. You can buy them for $599 and $799 each on iRobot’s official website.

You will notice there’s a significant difference in the price margin of these robots. But you can’t ignore the fact that the j7 has a lot more features to offer. We will discuss those features in detail below. The extra features and accessories definitely make it worth the price.

If you are on a budget, then the Roomba i3+ will satisfy your cleaning requirements, but it’s good to have those extra features for a higher price of the Roomba j7+.

Roomba i3/i3+ vs. j7/j7+ design

The i3+ has a grey-colored ring with a woven pattern on top. In comparison, the j7+ has a large silver circle on the top. Size-wise, both look identical, but the i3+ is slightly taller. The difference might not seem significant, but it makes an impact while maneuvering around tight spaces.

A striking difference in the design of these two models is the camera. These j series models have a front-facing camera, while these i series models have none.

As the Roomba j7+ is more compact in size, and it also has a camera, it would be the right option to choose.

Battery capacity

Battery section of Roomba
Battery section of Roomba

One of the significant points in the Roomba i3/i3+ vs. j7/j7+ comparison is the battery capacity. The i3+ features a 1,800 mAh Lithium Ion battery. It’s slightly less than the 2,210 mAh battery of j series robots. Despite the difference in their battery capacities, both vacuums take almost the same time to charge, which is 2 hours.

How long does the Roomba battery last on one charge?

In the case of Roomba i3+, the battery lasts for 75 minutes on one charge. And for the other robovac, the battery usually lasts for up to 100 minutes. This is because of its higher battery capacity.

Since the Roomba j7+ has a higher battery capacity and a longer runtime, it is the better choice.

Roomba navigating the floor
Roomba navigating the floor

You must know that there’s a gigantic difference in the navigation abilities of Roomba i3/i3+ vs. j7/j7+. The only similarity is the presence of Cliff Sensors. The Cliff sensors detect a difference in the height of the cleaning surface and command the robot to turn around if the difference is too much. Basically, it prevents your vacuum from falling down the stairs.

The Roomba i3+ does not have an onboard camera. So, visual navigation is out of the question. But it can map your room as per the latest iRobot update. It uses the traditional SLAM (Simultaneous localization and mapping) technology. This is certainly less efficient than visual mapping.

Also, the adaptive technology used by i3+ is outdated. It uses the iAdapt 1.0 Navigation system. Most recent models at least have the iAdapt 3.0 Navigation system.

How does Roomba i3 navigate if it doesn’t have a camera?

The Roomba i3 uses IR sensors and a Gyroscope for navigation. These sensors are capable of navigation and mapping your room. But they are not as effective as a camera. That’s why these models are not able to identify obstacles with ease.

How does Roomba j7 navigate?

Roomba j7 navigating using vSLAM Technology
Roomba j7 navigating using vSLAM Technology

The Roomba j7+ has a front-facing camera, so it uses the vSLAM Technology (visual Simultaneous Localization And Mapping) for navigation. It is also equipped with the PrecisionVision Navigation system, which allows for better navigation and obstacle avoidance. It uses the newer iAdapt 3.0 Navigation, making it better than the i3.

What’s the benefit of having a camera?

One benefit of having a front-facing camera in j7+ is the Hazard Detection feature. This feature is designed to find potential hazards on the cleaning surface. If the vacuum encounters any such hazards, it clicks a picture and sends it to your iRobot app. You can then tell the Roomba to go ahead around it or avoid it at all costs.

Clearly, the navigation capabilities of the Roomba j7+ are superior to the i3+ because of the front-facing camera, PrecisionVision Navigation system, and iAdapt 3.0 Navigation system.

Cleaning Performance

This is the part where real competitiveness is visible between the two models. Studies have shown that both models give similar cleaning performance. They clean with the same efficiency on all surface types. They even have the same cleaning technologies. Roomba’s standard 3-Stage Cleaning System and advanced Dirt Detection Technology are present in both models.

In this case, it is difficult to say which is the better vacuum as both of them use the same cleaning technologies and give similar cleaning performance.

Automatic dirt disposal system

The ‘+’ versions are better than the i3 and j7 as they have an automatic dirt disposal system. This is possible because of the Clean Base docking station that comes with them. This docking station sucks the waste out of your vacuum every time it docks. This collected waste is stored in a dirt disposal bag in the docking station itself. They leave the worry of manually emptying the bin out of your mind.

Pet owner official promise

The Roomba j7+ has another unique feature – the Pet Owner Official Promise (P.O.O.P). This guarantees that the vacuum will altogether avoid going near pet poop. So you don’t have to worry about your vacuum running over poop and creating more mess. iRobot guarantees that if your Roomba j7+ runs over poop, it will replace the model with a new one for free.

Since the Roomba j7+ has a self-emptying bin as well as gives P.O.O.P promise, in this case, this is a better choice over the i3+.

App features

The iRobot app for these models offers the usual features of initiating a cleaning cycle, scheduling a cleaning routine, giving voice commands, viewing cleaning history, etc.

No-go Zones

But the iRobot app for j series models also allows you to set No-go Zones. Once you create a No-go Zone, the vacuum will not enter that zone and turn around from there. This is like a software version of the virtual wall barriers. But this feature is not available for i3 and i3+. For them, you will have to separately buy virtual wall barriers and physically place them around your house.

iRobot Health

Another interesting feature for j7+ is iRobot Health. This feature sends you notifications about the state of your robot. It tells you when you need to replace the filter, change the side brush, clean the main rubber brushes, etc. It also has an extensive library of videos showing how you can take care of your vacuum.

Additional accessories

The following additional accessories are available with each of the below models:

  • Roomba i3: 1 Extra High-Efficiency Filter
  • Roomba i3+: 1 Extra High-Efficiency Filter, 2 Dirt Disposal Bags
  • Roomba j7: 1 Extra High-Efficiency Filter, 1 Extra Corner Brush
  • Roomba j7+:1 Extra High-Efficiency Filter, 1 Extra Corner Brush, 2 Dirt Disposal Bags

The Roomba j7+ has the most additional accessories that come with the vacuums, so the scales are tipping in its side.

What’s included with these robots?

The list of items included with each Roomba model is shown in the table below.

Roomba i3Roomba i3+Roomba j7Roomba j7+
1 Robot Vacuum1 Robot Vacuum1 Robot Vacuum1 Robot Vacuum
1 Home Base Charging Station1 Clean Base Docking Station1 Home Base Charging Station1 Clean Base Docking Station
1 Extra High-Efficiency Filter1 Extra High-Efficiency Filter1 Extra High-Efficiency Filter1 Extra High-Efficiency Filter
2 Dirt Disposal Bags1 Extra Corner Brush1 Extra Corner Brush
2 Dirt Disposal Bags
1 Power Cord
List of items present in each product


Consider factors such as your home’s layout, cleaning requirements, and budget to make an informed choice. The j7+ will be the better choice if you want advanced navigation and mapping capabilities. Of course, you will have to spend more on these models. But if you feel like navigation is not an issue, then the Roomba i3+ gives a cleaning performance like the i7 and i7+. You will also have to spend less on these models.


What is the difference between Roomba i3 and i3+?

The Roomba i3 and Roomba i3+ have only one difference. The latter has an automatic dirt disposal system. It can empty its dustbin into the Clean Base docking station without any manual interference.

Is Roomba i7 better than i3?

The Roomba i7 has superior navigation capability, better app features, and more additional accessories than the Roomba i3. So the Roomba i7 is definitely better than the i3.

Can Roomba j7+ work in the dark?

No, Roomba j7+ cannot work that well in the dark. It navigates based on the visual Simultaneous Localization And Mapping (vSLAM) technology. It needs to see well in order to navigate well. The absence of light causes less visibility in the Roomba, and hence, it doesn’t function well. But that does not mean that it will stop cleaning. It will move on based on what it is able to see.

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Siddhi Gurav

She is the editor and content writer at Smart Home Bulls. Siddhi merges her passion for language with SEO expertise. With 4 years of experience as a creative writer and a passion for smart home technology, she fits in perfectly at Smart Home Bulls. Her wide experience in content marketing has been an excellent addition to our team.

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