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

Irobot Roomba 621 Vs. Irobot Roomba I3 Evo Review

8 minute read   Last updated on Mar 5, 2024
iRobot Roomba i3 Evo

iRobot Roomba i3 Evo

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Key features of the iRobot Roomba i3 Evo

Overall Score 6.7

  • Battery Power of 1800 mAh
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 i3 Evo 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 0.5L 0.5L
automatically adjusts its height
indicates when full
weight 6.8kg 4.3kg
width 133mm 340mm
height 36mm 92mm
CLEANING PERFORMANCE AND POWER FEATURES battery power 1,800mAh 4,500mAh
operating time 1.5h 1.5h
charge time 2h 3h
operating power consumption 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 within your home may have different types of flooring i.e. carpets. When a robot vacuum cleaner is said to be able to clean all types of floors, it means that the robot vacuum is capable to clean flooring materials without any limitations.

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. This map allows the robot to "understand" 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 dedicate efficient cleaning in the mapped-out areas without accessing those that are not.

The iRobot Roomba i3 Evo 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 leaving out 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 way, this allwos it to navigate around them thus avoiding collisions.

Also, the iRobot Roomba i3 Evo has this sensor, obstacle sensors work together to provide the robot vacuum with a better understanding of its surroundings, enabling it to navigate around furniture, walls, and other objects when cleaning a room and avoiding damage to both the robot and its obstacles.

Supports No-Go Zones

No-go zones is a feature of many robot vacuum cleaners and iRobot Roomba i3 Evo supports this feature. These zones are basicaaly digital boundaries or restricted areas that you can set up preventing the robot from entering specific areas or rooms during its cleaning cycle.

Works With Alexa

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

Compatible With Google Assistant

iRobot Roomba i3 Evo is compatible with Google Assistant, enabling 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 621 has 3 cleaning modes, the number of cleaning modes offered by robot vacuum cleaners varies depending on the design of the robot vacuum.

iRobot Roomba i3 Evo, having only 3 has the same number of cleaning modes as the iRobot Roomba 621 Robot vacuum manufacturers offer different cleaning modes to provide users with flexibility and adaptability to various cleaning challenges.

Warranty Period

The iRobot Roomba 621 has a period of 1 year, this typically range from 1 year to 2 years, however some higher-end brands may offer longer warranties.

iRobot Roomba i3 Evo, at 1 year has the same warranty period as that of iRobot Roomba 621. When thinking of buying 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 i3 Evo
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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 621's dustbin capacity is at 0.5L, dustbin capacity indicates how much dust, dirt, and pet hair the robot vacuum holds before it needs to be emptied.

iRobot Roomba i3 Evo, at 0.5L has the same dustbin capacity as the iRobot Roomba 621 The dustbin capacity can vary widely among robot vacuum models, and the capcity 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. The iRobot Roomba 621 can adjust its height to match this requirement, for example, it may raise itself slightly when moving to a carpet to enable effective suction, and then lower itself on hard floors to ensure the brushes make good contact.

Indicates When Full

Most robot vacuum cleaners are equipped with sensors and indicators to notify users when the dirt collection container is full and needs to be emptied. iRobot Roomba i3 Evo 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 for easy maneuverability and portability.

The iRobot Roomba i3 Evo, at 6.8kg weighs more than the iRobot Roomba 621 by 2.5kg. It's advisable to consider the weight of the robot vacuum when getting a model, and that's if you plan to carry it up and down stairs

Width

iRobot Roomba 621 has a width of 340mm, often referred to as its cleaning path width, refers to the width of the area that it can properly 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 room

iRobot Roomba i3 Evo, at 133mm measures less in width than the iRobot Roomba 621 by 207mm. 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 measurement from the bottom of the robot vacuum to its highest point. Height is a key consideration, especially if you have furniture with low clearance in your home.

The iRobot Roomba i3 Evo, at 36mm measures less in height than the iRobot Roomba 621 by 56mm. 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 operate on a single charge. It is typically measured in milliampere-hours (mAh), iRobot Roomba 621's battery power is 4,500mAh

iRobot Roomba i3 Evo, at mAh1,800 has less battery power than the iRobot Roomba 621 by only A bigger capacity usually means longer battery life which can be beneficial if you have a large room or if you prefer the robot vacuum to complete cleaning cycles with fewer interruptions to recharge.

Operating Time

The operating time of the iRobot Roomba 621 refers to the 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 Evo, at 1.5h has the same operating time as the iRobot Roomba 621 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 i3 Evo, 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 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 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 several important purposes, making it a very important 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 an operation 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 Evo 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, 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 operation.

You may want to consider buying either the iRobot Roomba i3 Evo or iRobot Roomba 621 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 i3 Evo
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Other Features

Has Problem Area Cleaning

This feature enables you to instruct a robot vacuum to focus on cleaning a particular spot in your home, iRobot Roomba 621 supports this, which can be particularly useful for dealing with particular area messes or high-traffic areas.

iRobot Roomba i3 Evo also supports this feature, the spot cleaning feature is a better way to address specific area messes or high-traffic areas without running a full cleaning cycle for your entire space.

Has Carpet Detection

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

Support A Mobile Application

iRobot Roomba i3 Evo supports a smartphone app, that allows you to 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 chance of the robot vacuum getting trapped while cleaning. Robot vacuums such as the iRobot Roomba 621 are equipped with various sensors and technologies to move around obstacles and avoid getting trapped, however the effectiveness of this feature can vary among different models.

Both the iRobot Roomba i3 Evo 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 eliminate the chances of becoming stuck while cleaning.

Supports Virtual Barriers

These virtual barriers are typically 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 that enables it to create a map of your space and plan efficient cleaning routes. This mapping capability enhances the vacuum's ability to work effectively and systematically.

Route mapping is an important feature as it enables robot vacuums such as the iRobot Roomba i3 Evo to adapt to the layout of your home to clean more efficiently and reduce the possibility of missing certain spots.

Has Voice Prompts

Voice prompts refer to audible messages that the vacuum emits to provide you information on the different states of the vacuum. iRobot Roomba i3 Evo 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 certain conditions are met such as getting work done, battery running low, or any malfunction.

Both iRobot Roomba i3 Evo and iRobot Roomba 621 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 621 come having 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 Evo is essential in avoiding 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 621 has this convenient feature, which allows you to set certain days or times of day for the robot vacuum to start working.

Supports Wi-Fi

iRobot Roomba i3 Evo 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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