Home Robot Vacuum Cleaners Irobot Roomba 675 Vs. Irobot Roomba 621

Irobot Roomba 675 Vs. Irobot Roomba 621 Review

8 minute read   Last updated on Mar 5, 2024
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
VS
iRobot Roomba 675

iRobot Roomba 675

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Key features of the iRobot Roomba 675

Overall Score 5.9

  • Can Clean All Floor Types
  • Battery Power of 1800 mAh

A summary by feature comparison

Category Features iRobot Roomba 621 iRobot Roomba 675
COMMONLY ASKED FOR FEATURES can clean all floor types
has mapping and navigation
has an obstacle sensor
works with alexa
compatible with google assistant
number of cleaning modes 3only
warranty period 1year 1year
DESIGN FEATURES has included washable filters
dustbin capacity 0.5L 0.4L
automatically adjusts its height
weight 4.3kg 3.5kg
width 340mm 330mm
height 92mm 94mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 4,500mAh 1,800mAh
operating time 1.5h 1.5h
charge time 3h 2h
operating power consumption 33W 33W
has overheating indicator
has auto-off
has dirt sensor
OTHER FEATURES has problem area cleaning
has carpet detection
support a mobile application
doesn't get stuck
supports virtual barriers
has route mapping
has voice prompts
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 675 cleans all floor types, this feature is essential, as different rooms within a home may have different types of flooring i.e. carpets. If a robot vacuum is said to be as being able to clean all floor types, this means that the vacuum is capable to clean a wide range of flooring materials without any limitations.

iRobot Roomba 621 aslo cleans all floor types, meaning it is built to be adaptable, providing best cleaning performance on either carpets or hard floors found in most homes.

Has Mapping And Navigation

A vacuum's ability to create a digital map of its cleaning area is one of the commonly asked-for features. The map it creates allows the robot to keep a record of the layout of the space. Mapping and navigation can be used for several purposes, e.g. the iRobot Roomba 621 having the mapping feature can dedicate efficient cleaning in the mapped-out areas keeping out of those that are not.

Has An Obstacle Sensor

iRobot Roomba 675 has an obstacle sensor, such a sensor serves the purpose of detecting and identifying objects in the robot's path, allowing it to navigate around them thus avoiding collisions.

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

Works With Alexa

Many modern robot vacuum cleaners such as the iRobot Roomba 675 are built to work with Amazon Alexa, which means that they can be added to the Amazon Echo ecosystem and controlled using voice commands.

Compatible With Google Assistant

The iRobot Roomba 675 is compatible with Google Assistant, allowing you to control it using voice commands via Google Home devices or the Google Assistant app installed on smartphones and tablets.

Number Of Cleaning Modes

The iRobot Roomba 621 has 3 cleaning modes, the number of cleaning modes supported by robot vacuums can vary depending on the make and model of the robot vacuum.

Warranty Period

The iRobot Roomba 675 has a period of 1 year, this typically range from 1 - 2 years, however some higher-end brands may offer longer warranties.

The iRobot Roomba 621, at 1 year has the same warranty period as that of iRobot Roomba 675. When considering a robot vacuum cleaner, it's essential to read and understand the warranty terms and conditions, as well as any limitations or exclusions that may apply.

iRobot Roomba 621
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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 keep up the vacuum's performance.

Dustbin Capacity

iRobot Roomba 675's dustbin capacity is at 0.4L, dustbin capacity determines how much dust, debris, and pet hair the vacuum can hold before it can be emptied.

The iRobot Roomba 621, at 0.5L has more capacity than the iRobot Roomba 675 with a difference of 0.1L The dustbin capacity can vary widely among different robot vacuum models, and the size 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. The iRobot Roomba 621 can adjust its height to match this demand, for example, it may raise itself slightly when transitioning to a carpet to allow for effective suction, and then lower itself on hard floors to ensure the brushes make good contact.

Weight

iRobot Roomba 675 weighs 3.5kg, robot vacuums are commonly designed to be lightweight and compact to easily get around and carrying around.

iRobot Roomba 621, at 4.3kg weighs more than the iRobot Roomba 675 with a difference of 0.8kg. It's advisable to take in consideration the weight of the vacuum when selecting a model, and that's if you plan to carry it up and down stairs

Width

iRobot Roomba 675 has a width of 330mm, often referred to as its cleaning path width, is the width of the area that the robot vacuum can effectively clean in a single pass. The width of a robot vacuum is key as it can affect its efficiency and the time it takes to clean a room

iRobot Roomba 621, at 340mm measures more in width than the iRobot Roomba 675 by 10mm. A wider cleaning path can cover more ground in a single pass, shortening the time it takes to clean a room.

Height

iRobot Roomba 675's height measures 94mm, 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 limited clearance in your home.

The iRobot Roomba 621, at 92mm measures less in height than the iRobot Roomba 675 by 2mm. When choosing a robot vacuum, ensure 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. It is measured in milliampere-hours (mAh), iRobot Roomba 675's battery power is 1,800mAh

iRobot Roomba 621, at mAh4,500 has more battery power than the iRobot Roomba 675 by A bigger capacity usually means longer battery life which can be of advantage if you have a large home or if you would like the robot vacuum to complete cleaning cycles with fewer interruptions to recharge.

Operating Time

The operating time of the iRobot Roomba 675 refers to the time the vacuum can clean continuously on a single battery charge before it needs to be recharged. iRobot Roomba 675's operating time is 1.5h

The iRobot Roomba 621, at 1.5h has the same operating time as the iRobot Roomba 675 Always plan cleaning cycles around the vacuum's operating time to maximize efficiency and prevent "incomplete work" between charge intervals.

Charge Time

iRobot Roomba 675 has a charge time of 2h, 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 charges for longer than the iRobot Roomba 675 with a difference of 1h. Charge time is an important factor to consider when choosing a robot vacuum, as it determines how long you'll need to wait before the vacuum begins 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 675 has a power consumption of 33W, power is measured in watts (W) and changes among different robot vacuum models based on several consuption factors.

iRobot Roomba 621, at 33W has the same power consumption as that of iRobot Roomba 675. Lower power consumption is more energy-efficient and cost-effective over time, however it may also affect cleaning performance, especially on carpets.

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 sensing when key components, such as the motor or battery, are operating at temperatures that could cause harm.

Has Auto-Off

This feature is designed to automatically turn off the vacuum after it has completed an operation or when certain conditions occur. iRobot Roomba 675 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 valuable 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 675 has a dirt sensor, these are designed to detect the concentration of dirt, dust, or debris in the space being cleaned and based on their readings adjust the vacuum's cleaning behavior during cleaning cycle.

You may want to consider buying either the iRobot Roomba 621 or iRobot Roomba 675 If you value 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 621
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Other Features

Has Problem Area Cleaning

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

Has Carpet Detection

iRobot Roomba 621 has carpet detection, which allows the vacuum to identify and adjust to different floor surfaces, to be specific recognizing when it moves from hard floors like hardwood to areas with carpets.

Support A Mobile Application

iRobot Roomba 675 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 intended to eliminate the likelihood of the robot vacuum becoming trapped while cleaning. Robot vacuums such as the iRobot Roomba 675 are equipped with various sensors and technologies to navigate around obstacles and avoid getting stuck, but the effectiveness of this feature can vary among different models.

Both the iRobot Roomba 621 and iRobot Roomba 675 have the "anti-stuck" feature, but clearing clutter, ensuring proper cable management, and creating clear paths for the vacuums helps to further eliminate the chances of becoming stuck while cleaning.

Supports Virtual Barriers

Virtual barriers are set up and controlled via 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 621 has a route mapping feature that enables it to create a map of your home and plan efficient cleaning routes. This mapping capability improves the vacuum's ability to work effectively and systematically.

Has Voice Prompts

Voice prompts refer to notifications that the vacuum emits to give you information on the different states of the vacuum. iRobot Roomba 675 supports this feature

Supports Auto Docking

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

Both iRobot Roomba 621 and iRobot Roomba 675 support this feature, considered a convenient feature because it ensures that the robot vacuum maintains its charge and readiness for cleaning with little or no manual intervention.

Has Anti-Fall Sensor

Most robot vacuum cleaners such as iRobot Roomba 675 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, ensuring its safety while cleaning.

This safety feature that is also available on the iRobot Roomba 621 is essential in preventing accidents and keeping 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 675 has this convenient feature, which enables you to set certain days or times of day for the robot vacuum to start working.

The scheduling feature in robot vacuums is particularly 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 675 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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