Home Robot Vacuum Cleaners Irobot Roomba 621 Vs. Irobot Roomba I3

Irobot Roomba 621 Vs. Irobot Roomba I3 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 i3

iRobot Roomba i3

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Key features of the iRobot Roomba i3

Overall Score 5.9

  • Battery Power of 1800 mAh
  • Is Self-Emptying

A summary by feature comparison

Category Features iRobot Roomba 621 iRobot Roomba i3
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
indicates when full
weight 4.3kg 4.3kg
width 340mm 337mm
height 92mm 92mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 4,500mAh 1,800mAh
operating time 1.5h 1.25h
charge time 3h 5h
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
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 is essential, as different rooms within your home may have different types of flooring i.e. carpets. When a robot vacuum cleaner is advertised as being able to clean all floor types, this implies that the robot vacuum is capable to clean several flooring materials without any significant issues.

Has Mapping And Navigation

A vacuum's ability to create a digital map of its cleaning space is one of the commonly asked-for features. The map it creates allows the robot to "understand" the layout of the space. This can be used for different situations, e.g. the iRobot Roomba 621 having the mapping feature can dedicate efficient cleaning in the mapped-out areas without accessing those that are not.

The iRobot Roomba i3 also has the mapping and navigation feature, navigation states how the robot vacuum moves around the cleaning area. Mapping and navigation often go hand in hand to help the vacuum navigate to the mapped-out areas to be cleaned ignoring those that aren't.

Has An Obstacle Sensor

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

Also, the iRobot Roomba i3 has this sensor, obstacle sensors work together to provide the robot vacuum with a comprehensive understanding of its surroundings, 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

Most modern robot vacuum cleaners such as the iRobot Roomba i3 are designed to work with Amazon Alexa, which implies that they can be integrated with the Amazon Echo ecosystem and controlled using voice commands.

Compatible With Google Assistant

iRobot Roomba i3 is compatible with Google Assistant, allowing you to control it using voice commands through 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 design of the robot vacuum.

Warranty Period

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

The iRobot Roomba i3, at 1 year has the same warranty period as that of iRobot Roomba 621. When considering a robot vacuum cleaner, it's important 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 cleaned to keep up the vacuum's performance.

Dustbin Capacity

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

iRobot Roomba i3, at 0.4L carries less dirt than the iRobot Roomba 621 with a difference of only 0.1L The dustbin capacity can vary widely among different 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. The iRobot Roomba 621 can adjust 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 ensure the brushes make good contact.

Indicates When Full

Many robot vacuum cleaners are equipped with sensors and indicators to alert users when the dustbin is full and needs to be emptied. iRobot Roomba i3 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

The iRobot Roomba 621 weighs 4.3kg, robot vacuums are commonly designed to be lightweight and compact to easily get around and portability.

iRobot Roomba i3, at 4.3kg has the same weight as the iRobot Roomba 621. It's important to take in consideration the weight of the vacuum when choosing 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 it can effectively clean in one go. The width of a robot vacuum is key as it can affect its efficiency and the time it takes to clean a space

The iRobot Roomba i3, at 337mm measures less in width than the iRobot Roomba 621 with a difference of 3mm. 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 considering the measure from the bottom to its highest point. Height is a key consideration, especially if you have furniture with low clearance in your home.

iRobot Roomba i3, at 92mm has the same height as that of iRobot Roomba 621. When choosing a robot vacuum, make sure 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 operate on a single charge. Battery capacity is measured in milliampere-hours (mAh), iRobot Roomba 621's battery power is 4,500mAh

The iRobot Roomba i3, 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 prefer the robot vacuum to complete cleaning cycles without frequent interruptions to recharge.

Operating Time

The operating time of the iRobot Roomba 621 refers to the amount of time the vacuum can clean continuously on a single battery charge before it needs to return to its charging dock for recharging. iRobot Roomba 621's operating time is 1.5h

The iRobot Roomba i3, at 1.25h spends less time than the iRobot Roomba 621 with a difference of only 0.25h 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.

The iRobot Roomba i3, at 5h charges for longer than the iRobot Roomba 621 by 2h. 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 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 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 many key purposes, making it a very important safety feature. It helps protect the iRobot Roomba 621 from damage by detecting when key 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 certain conditions occur. iRobot Roomba 621 has an auto-off feature, which is useful for energy efficiency and battery preservation.

Also, iRobot Roomba i3 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 process.

Has Dirt Sensor

iRobot Roomba 621 has a dirt sensor, dirt sensors are designed to detect the concentration of dirt, dust, or debris in the area being cleaned and based on their readings adjust the vacuum's cleaning behavior during operation.

iRobot Roomba 621
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Other Features

Is Self-Emptying

Self-emptying robot vacuum cleaners like the iRobot Roomba i3, are advanced robot vacuum models that have the ease of use feature to empty their dustbins automatically.

Has Problem Area Cleaning

Problem area cleaning enables you to command a robot vacuum to focus on cleaning a particular area in your space, the iRobot Roomba 621 supports this, which can be particularly useful for addressing particular area messes or busy areas.

Has Carpet Detection

iRobot Roomba 621 has carpet detection, which allows the vacuum to identify and adjust to all kinds of floor surfaces, to be specific recognizing when it transitions from hard floors like hardwood to carpets.

Support A Mobile Application

iRobot Roomba i3 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 stuck while cleaning. Robot vacuums such as the iRobot Roomba 621 are equipped with various sensors and technologies to navigate around obstacles and avoid getting trapped, however the effectiveness of this feature varies among different models.

Both the iRobot Roomba i3 and iRobot Roomba 621 have the "anti-stuck" feature, but clearing clutter, ensuring proper cable management, and creating clear paths for the vacuums helps to further reduce the chances of becoming stuck during cleaning.

Has Route Mapping

iRobot Roomba 621 has a route mapping feature that enables it to generate a map of your home and plan efficient cleaning routes. This mapping capability enhances 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 i3 to adapt to the layout of your space to clean more efficiently and reduce the risk of missing certain spots.

Has Voice Prompts

Voice prompts are audible messages that the vacuum states to provide you information on the different states of the vacuum. iRobot Roomba i3 has this feature

Supports Auto Docking

Auto-docking is a feature that refers to 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 i3 and iRobot Roomba 621 support this feature, considered a convenient feature because it makes sure 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 621 come equipped with an "cliff detection" feature. This feature is intended 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 i3 is essential in preventing accidents and protecting the robot vacuum from damage. It gives you peace of mind knowing 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 enables you to set certain days or times of day for the robot vacuum to start cleaning your space.

This feature in robot vacuums is specifically useful in maintaining a consistently clean home without the need for manual intervention. iRobot Roomba i3 too can be scheduled.

Supports Wi-Fi

iRobot Roomba i3 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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