Home Robot Vacuum Cleaners Irobot Roomba 621 Vs. Irobot Roomba 676

Irobot Roomba 621 Vs. Irobot Roomba 676 Review

7 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 676

iRobot Roomba 676

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Key features of the iRobot Roomba 676

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 676
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 0.35L
automatically adjusts its height
weight 4.3kg 3kg
width 340mm 340mm
height 92mm 92mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 4,500mAh 1,800mAh
operating time 1.5h 2h
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 621 can clean all floor types, this feature comes in handy, as different rooms inside a home may have different types of flooring i.e. carpets. If a robot vacuum is stated able to clean all types of floors, it implies that the robot vacuum is capable to clean most flooring materials without much limitations.

iRobot Roomba 676 can also clean all floor types, this means that it too is designed to be versatile, providing best cleaning performance on either hard floors or carpets commonly found in homes.

Has Mapping And Navigation

The vacuum's ability to generate a digital 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. Mapping and navigation can be used for several purposes, for example the iRobot Roomba 621 having the mapping feature can provide efficient cleaning in the mapped-out areas without accessing those that are not.

Has An Obstacle Sensor

iRobot Roomba 621 has an obstacle sensor, this serves the purpose of detecting and identifying obstacles in the robot's way, this allwos it to navigate around them and avoid collisions.

Also, the iRobot Roomba 676 has an obstacle sensor, obstacle sensors work together to provide the robot vacuum with a comprehensive understanding of its environment, making it possible to navigate around furniture, walls, and other objects when cleaning a room and avoiding damage to both the robot and its obstacles.

Works With Alexa

Many modern robot vacuum cleaners such as the iRobot Roomba 676 are designed 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 676 is compatible with Google Assistant, enabling 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 cleaning modes supported by robot vacuum cleaners can vary widely depending on the make and model of the robot vacuum.

Warranty Period

The iRobot Roomba 621 has a period of 1 year, warranty periods typically range from 1 year to 2 years, but some higher-end models may give longer warranties.

The iRobot Roomba 676, at 1 year has the same warranty period as that of iRobot Roomba 621. When considering a robot vacuum cleaner, it's essential to read and understand the warranty terms and conditions, alongside 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

The iRobot Roomba 621's dustbin capacity is at 0.5L, dustbin capacity determines how much dust, dirt, and pet hair the vacuum holds before it can be emptied.

The iRobot Roomba 676, at 0.35L carries less dirt than the iRobot Roomba 621 by only 0.15L The dustbin capacity can vary widely among different robot vacuum models, and the size you choose should be based 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 requirement, for example, it may raise itself slightly when transitioning to a carpet to enable effective suction, and then lower itself on hard floors to ensure the brushes make good contact.

Weight

iRobot Roomba 621 weighs 4.3kg, robot vacuums are commonly designed to be lightweight and compact for easy maneuverability and carrying around.

The iRobot Roomba 676, at 3kg is lighter than the iRobot Roomba 621 by 1.3kg. It's important to take in consideration the weight of the vacuum when selecting a model, especially if you plan to carry it up and down stairs

Width

iRobot Roomba 621 has a width of 340mm, aslo known as its cleaning path width, is the width of the area that the robot vacuum can properly clean in a single pass. The width of a robot vacuum is key as it can affect its efficiency and the duration it takes to clean a space

The iRobot Roomba 676, at 340mm has the same width as that of iRobot Roomba 621. A wider cleaning path can cover more ground in a single pass, shortening the time it takes to clean a room.

Height

iRobot Roomba 621's height measures 92mm, here you are looking at the measure from the bottom to its highest point. Height is an important consideration, especially if you have obstacles with limited clearance in your home.

iRobot Roomba 676, at 92mm has the same height as that of iRobot Roomba 621. When selecting a robot vacuum, ensure that the robot vacuum can fit 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 621's battery power is 4,500mAh

iRobot Roomba 676, at mAh1,800 has less battery power than the iRobot Roomba 621 with a difference of only A bigger capacity implies longer battery life which can be beneficial if you have a large room or if you would like the robot vacuum to complete cleaning cycles without frequent interruptions to recharge.

Operating Time

The operating time of a robot vacuum cleaner refers to the amount of time the vacuum can clean continuously on a single charge before it needs to be recharged. iRobot Roomba 621's operating time is 1.5h

iRobot Roomba 676, at 2h lasts more than the iRobot Roomba 621 with a difference of 0.5h Always plan cleaning cycles around the vacuum's operating time to maximize efficiency and prevent "incomplete work" between charge intervals.

Charge Time

iRobot Roomba 621 has a charge time of 3h, 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 676, at 2h spends lesser time charging than the iRobot Roomba 621 by only 1h. 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

This is 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 often measured in watts (W) and changes among different robot vacuum models based on several consuption factors.

iRobot Roomba 676, at 33W has the same power consumption as that of iRobot Roomba 621. Lower power consumption can be more energy-efficient and cost-effective over time, but it may also affect cleaning performance, especially on carpets.

Has Overheating Indicator

An overheating indicator in a robot vacuum serves many key purposes, making it a very important 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

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 621 has an auto-off feature, which is useful for energy efficiency and battery preservation.

Also, iRobot Roomba 676 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 621 has a dirt sensor, dirt sensors are designed to detect the availability of dirt, dust, or debris in the area 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 676 or iRobot Roomba 621 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 home.

iRobot Roomba 621
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Other Features

Has Problem Area Cleaning

Problem area cleaning allows you to command a robot vacuum to focus on cleaning a specific area in your home, the 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, specifically recognizing when it transitions from hard floors like tile to carpeted areas.

Support A Mobile Application

iRobot Roomba 676 supports a smartphone app, that allows you to control and monitor the vacuum without getting to it physically but through your smartphone or tablet.

Doesn't Get Stuck

This feature in robot vacuum cleaners is designed to eliminate the likelihood of the robot vacuum getting trapped while cleaning. Robot vacuums such as the iRobot Roomba 621 are equipped with various sensors and technologies to navigate around obstacles and avoid getting stuck, but the effectiveness of this feature varies among different models.

Both the iRobot Roomba 676 and iRobot Roomba 621 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 getting stuck during cleaning.

Supports Virtual Barriers

Virtual barriers are set up and controlled through the robot vacuum's mobile app, similar to no-go zones, these barriers are setup to help you control and restrict where the robot vacuum can and cannot go while cleaning.

Has Route Mapping

iRobot Roomba 621 has a route mapping feature which enables it to create a map of your space and schedule efficient cleaning routes. This mapping capability enhances the vacuum's ability to clean effectively and systematically.

Has Voice Prompts

Voice prompts are notifications that the vacuum emits to provide you alerts on the different states of the vacuum. iRobot Roomba 676 supports this feature

Supports Auto Docking

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

Both iRobot Roomba 676 and iRobot Roomba 621 support this feature, considered a convenient feature because it ensures that the robot vacuum maintains its charge and readiness for cleaning without requiring manual intervention.

Has Anti-Fall Sensor

Most robot vacuum cleaners such as iRobot Roomba 621 come having an "anti-fall" feature. This feature is designed to prevent the robot vacuum from falling off stairs, ledges, or other elevated surfaces, thus its safety during operation.

This safety feature that is also available on the iRobot Roomba 676 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 621 has this convenient feature, which allows you to set certain days or times of day for the robot vacuum to start working.

This feature in robot vacuums is particularly useful in maintaining a consistently clean space without the need for manual intervention. iRobot Roomba 676 too allows scheduling.

Supports Wi-Fi

iRobot Roomba 676 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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