Home Robot Vacuum Cleaners Irobot Roomba J7 Vs. Irobot Roomba 621

Irobot Roomba J7 Vs. Irobot Roomba 621 Review

8 minute read   Last updated on Mar 5, 2024
iRobot Roomba j7

iRobot Roomba j7

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Key features of the iRobot Roomba j7

Overall Score 6.4

  • Is Self-Emptying
VS
iRobot Roomba 621

iRobot Roomba 621

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Key features of the iRobot Roomba 621

Overall Score 6.4

  • Can Clean All Floor Types
  • Has Included Washable Filters
  • Battery Power of 4500 mAh

A summary by feature comparison

Category Features iRobot Roomba j7 iRobot Roomba 621
COMMONLY ASKED FOR FEATURES can clean all floor types
has mapping and navigation
has an obstacle sensor
supports no-go zones
works with alexa
compatible with google assistant
number of cleaning modes 3only 3only
warranty period 1year 1year
DESIGN FEATURES has included washable filters
dustbin capacity 0.6L 0.5L
automatically adjusts its height
indicates when full
weight 3.4kg 4.3kg
width 340mm 340mm
height 90mm 92mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 4,500mAh
operating time 1.4h 1.5h
charge time 6h 3h
operating power consumption 33W
has overheating indicator
has auto-off
has dirt sensor
OTHER FEATURES is self-emptying
has problem area cleaning
has carpet detection
support a mobile application
doesn't get stuck
supports virtual barriers
has route mapping
supports auto docking
has anti-fall sensor
can be scheduled
supports wi-fi
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Let's look at each feature category in detail

Commonly Asked For Features

Can Clean All Floor Types

iRobot Roomba 621 cleans all floor types, this comes in handy, since different rooms within a home may have various types of flooring i.e. carpets. If a robot vacuum is said to be as being able to clean all floor types, it means that the robot vacuum is designed and equipped to clean several flooring materials without any limitations.

Has Mapping And Navigation

The robot vacuum's ability to create a map of its cleaning area is one of the commonly asked-for features. This map allows the robot to keep a record of the layout of the space. This can be used for several purposes, for example the iRobot Roomba j7 having the mapping feature can provide efficient cleaning in the mapped-out areas without accessing those that are not.

The iRobot Roomba 621 also has the mapping and navigation feature, navigation defines how the robot vacuum moves around the cleaning area. Mapping and navigation often go hand in hand to help the vacuum move to the mapped-out areas to be cleaned ignoring those that aren't.

Has An Obstacle Sensor

iRobot Roomba j7 has an obstacle sensor, such a sensor serves the purpose of detecting and identifying objects in the robot's path, this allwos it to navigate around them thus avoiding collisions.

Also, the iRobot Roomba 621 has an obstacle sensor, obstacle sensors work together to provide the robot vacuum with a better understanding of its environment, making it possible to navigate around furniture, walls, and other objects when cleaning a room thus preventing damage to both the robot and its obstacles.

Supports No-Go Zones

No-go zones is a feature found on many advanced robot vacuum cleaners and iRobot Roomba j7 is one of them. These zones are basicaaly digital boundaries or restricted spaces that you can set up to prevent the robot from entering specific areas or rooms during its cleaning cycle.

Works With Alexa

Most modern robot vacuum cleaners such as the iRobot Roomba j7 are designed to work with Amazon Alexa, which means that they can be integrated with the Amazon Echo ecosystem and controlled using voice commands.

Compatible With Google Assistant

iRobot Roomba j7 is compatible with Google Assistant, allowing you to control it using voice commands through Google Home devices or the Google Assistant app found on smartphones and tablets.

Number Of Cleaning Modes

iRobot Roomba j7 has 3 cleaning modes, the number of cleaning modes supported by robot vacuum cleaners varies depending on the make and model of the robot vacuum.

iRobot Roomba 621, having only 3 has the same number of cleaning modes as the iRobot Roomba j7 Robot vacuum manufacturers offer different cleaning modes to provide users with flexibility and adaptability to various cleaning surfaces.

Warranty Period

The iRobot Roomba j7 has a period of 1 year, this typically range from 1 - 2 years, but some higher-end brands may offer longer warranty periods.

The iRobot Roomba 621, at 1 year has the same warranty period as that of iRobot Roomba j7. When thinking of buying a robot vacuum cleaner, it's important to read and understand the warranty terms and conditions, alongside any limitations or exclusions that may apply.

iRobot Roomba j7
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Design Features

Has Included Washable Filters

The iRobot Roomba 621 has washable filters, these are designed to capture dust, dirt, and fine particles during the cleaning process and can be easily removed and washed to maintain the vacuum's performance.

Dustbin Capacity

iRobot Roomba j7's dustbin capacity is at 0.6L, dustbin capacity indicates how much dust, dirt, and pet hair the robot vacuum can hold before it can be emptied.

The iRobot Roomba 621, at 0.5L carries less dirt than the iRobot Roomba j7 with a difference of only 0.1L The dustbin capacity varies widely among robot vacuum models, and the capcity you choose should depend on your cleaning needs and the size of the area you want to clean.

Automatically Adjusts Its Height

Different floor types require a robot vacuum to be at a given ground clearance so as to optimize performance. iRobot Roomba 621 adjusts its height to match this demand, for example, it may raise itself slightly when moving to a carpet to allow for effective suction, and then lower itself on hard floors to make sure the brushes make good contact.

Indicates When Full

Many robot vacuum cleaners are equipped with sensors and indicators to notify users when the dustbin is full and needs to be emptied. iRobot Roomba j7 supports this feature, which prevents the robot vacuum from getting clogged which means performance will be maintained as soon as the bin is emptied.

Weight

iRobot Roomba j7 weighs 3.4kg, robot vacuums are commonly designed to be lightweight and compact to easily get around and portability.

The iRobot Roomba 621, at 4.3kg weighs more than the iRobot Roomba j7 by 0.9kg. It's important to consider the weight of the vacuum when getting a model, and that's if you plan to carry it up and down stairs

Width

iRobot Roomba j7 has a width of 340mm, often referred to as its cleaning path width, refers to the width of the area that the robot vacuum can effectively clean in one go. The width of a robot vacuum is important as it can affect its efficiency and the duration it takes to clean a space

The iRobot Roomba 621, at 340mm has the same width as that of iRobot Roomba j7. A wider cleaning path can cover more ground in a single pass, shortening the time it takes to clean a room.

Height

iRobot Roomba j7's height measures 90mm, here you are looking at the measurement from the bottom of the robot vacuum to its highest point. Height is a key consideration, especially if you have obstacles with low clearance in your home.

iRobot Roomba 621, at 92mm measures more in height than the iRobot Roomba j7 with a difference of 2mm. When selecting a robot vacuum, make sure that the robot vacuum can go under the furniture and navigate effectively in your living space without getting stuck or causing damage.

Cleaning Performance And Power Features

Battery Power

The battery power of a robot vacuum cleaner is important as it determines how long the vacuum can run on a single charge. Battery capacity is typically measured in milliampere-hours (mAh), iRobot Roomba 621's battery power is 4,500mAh

Operating Time

The operating time of the iRobot Roomba j7 refers to the time the vacuum can clean continuously on a single battery charge before it needs to be recharged. iRobot Roomba j7's operating time is 1.4h

iRobot Roomba 621, at 1.5h lasts more than the iRobot Roomba j7 with a difference of 0.1h Always plan cleaning cycles around the vacuum's operating time to maximize efficiency and prevent "incomplete work" between charge intervals.

Charge Time

iRobot Roomba j7 has a charge time of 6h, the charge time of a robot vacuum cleaner refers to the amount of time it takes for the vacuum's battery to recharge fully after it has been depleted during a cleaning cycle.

iRobot Roomba 621, at 3h spends lesser time charging than the iRobot Roomba j7 with a difference of only 3h. Charge time is an important factor to consider when choosing a robot vacuum, since it determines how long you'll need to wait before the vacuum is ready for its next cleaning cycle.

Operating Power Consumption

The operating power consumption of a robot vacuum cleaner refers to the amount of electrical power the vacuum uses while it's actively cleaning your home. iRobot Roomba 621 has a power consumption of 33W, power is typically measured in watts (W) and changes among different robot vacuum models based on several consuption factors.

Has Overheating Indicator

An overheating indicator in a robot vacuum serves several key purposes, making it a valuable safety feature. It helps protect the iRobot Roomba 621 from damage by detecting when critical components, such as the motor or battery, are operating at temperatures that are dangerous.

Has Auto-Off

Auto-off is a feature designed to automatically turn off the vacuum after it has completed a cleaning cycle or when specific conditions occur. iRobot Roomba j7 has an auto-off feature, which is useful for energy efficiency and battery preservation.

Also, iRobot Roomba 621 supports this feature, overall, the auto-off feature in a robot vacuum is a key addition that in a way promotes energy efficiency, prolongs the vacuum's lifespan, enhances safety, and adds convenience to the cleaning operations.

Has Dirt Sensor

iRobot Roomba j7 has a dirt sensor, these are designed to detect the concentration of dirt, dust, or debris in the space being cleaned and can be used to adjust the vacuum's cleaning behavior during cleaning cycle.

You may want to consider buying either the iRobot Roomba 621 or iRobot Roomba j7 If you prefer the ability to automatically adjust the cleaning modes of the robot vacuum based on the level of dirt and debris in your space.

iRobot Roomba j7
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Other Features

Is Self-Emptying

Self-emptying robot vacuum cleaners like the iRobot Roomba j7, are modern robot vacuum models that have the ease of use feature to empty their dustbins automatically.

Has Problem Area Cleaning

This feature enables you to program a robot vacuum to focus on cleaning a particular area in your space, iRobot Roomba 621 supports this, which can be particularly useful for addressing localized messes or high-traffic areas.

Has Carpet Detection

iRobot Roomba 621 has carpet detection, this enables the vacuum to identify and adjust to different floor surfaces, to be specific recognizing when it moves from hard floors like tile to carpets.

Support A Mobile Application

iRobot Roomba j7 supports a smartphone app, through which you can control and monitor the vacuum remotely through your smartphone or tablet.

Doesn't Get Stuck

This feature in robot vacuum cleaners is designed to reduce the likelihood of the robot vacuum becoming trapped during cleaning. Robot vacuums such as the iRobot Roomba j7 are equipped with various sensors and technologies to navigate around obstacles and avoid getting trapped, however the effectiveness of this feature can vary among different models.

Both the iRobot Roomba 621 and iRobot Roomba j7 have the "anti-stuck" feature, but clearing clutter, ensuring proper cable management, and creating clear paths for the vacuums can help further reduce the chances of becoming stuck while cleaning.

Supports Virtual Barriers

These virtual barriers are typically set up and managed through the robot vacuum's mobile app, similar to no-go zones, these barriers are setup to enable you control and restrict where the robot vacuum can and cannot go during cleaning.

Has Route Mapping

iRobot Roomba j7 has a route mapping feature which enables it to create a map of your home and schedule efficient cleaning routes. This mapping capability improves the vacuum's ability to clean effectively and systematically.

Route mapping is an important feature as it makes it possible for robot vacuums such as the iRobot Roomba 621 to adapt to the layout of your home to work more efficiently and reduce the possibility of missing certain spots.

Supports Auto Docking

Auto-docking is a feature that indicates the vacuum's ability to autonomously return to its docking station when predetermined conditions are met such as done with cleaning, battery running low, or any malfunction.

Both iRobot Roomba 621 and iRobot Roomba j7 support this feature, considered a convenient feature because it makes sure that the robot vacuum keeps its charge and readiness for cleaning without requiring manual intervention.

Has Anti-Fall Sensor

Modern robot vacuum cleaners such as iRobot Roomba j7 come equipped with an "anti-fall" feature. This feature is intended to prevent the robot vacuum from falling off stairs, ledges, or other elevated surfaces, hence its safety during operation.

This safety feature that is also available on the iRobot Roomba 621 is key in mitigating accidents and protecting the robot vacuum from damage. It gives you peace of mind by ensuring that the vacuum will not fall down a flight of stairs during its cleaning cycle.

Can Be Scheduled

iRobot Roomba j7 has this convenient feature, which enables you to set specific days or times of day for the robot vacuum to start working.

This feature in robot vacuums is specifically useful in keeping a consistently clean space without the need for manual intervention. iRobot Roomba 621 too can be scheduled.

Supports Wi-Fi

iRobot Roomba j7 supports Wi-Fi, Wi-Fi-enabled robot vacuums offer several advantages and features, such as remote control, mobile app integration, voice assistant compatibility, and remote monitoring.

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