Although it comes from a less popular brand, you will appreciate the fact that the Coredy D400 comes with some very impressive features. If you compare it with similar models within its price range, you’ll be amazed by the incredible value you get for the money spent on this vacuum.

Coredy D400

In this article, we are going to take a closer look at this robot vacuum in a bid to understand some of the features that it comes with and the results that you should expect from it. Without wasting any more time, let’s jump in!

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Cleaning Performance

The amount of suction available from a vacuum cleaner helps determine to a great extent how effective it will be at picking up dirt and debris from the floor. This robot has a motor that generates up to 1400Pa of suction. This is more than sufficient for picking up particles of all sizes from carpets and hard floors.

Coredy D400 Review

Coredy D400

It comes with two spinning side brushes that collect dirt from the areas where the main brush can’t reach and sweep it under the robot so that it can be picked up by the suction. It has a large and easy to clean dirt collection bin that has been designed to give you an easy and mess-free time emptying.

At only 2.77 inches tall, this robot vacuum will have no problems fitting in tight spots in your home. Thanks to this low height, you can forget about the difficulty of trying to reach the hidden spots under furniture.

Navigation and Controls

Being a robot vacuum that performs the cleaning automatically, navigation is a vital ingredient in this robot’s success. Fortunately, it does not disappoint with smart collision avoidance and anti-drop sensors that will give you peace of mind knowing that your investment is secure.

This robot also comes with a gyroscope that helps it to accurately plan a cleaning map that will ensure maximum efficiency while ensuring that no spots are missed in the cleaning. You can also connect to your home Wi-Fi network and use the smartphone app to track the cleaning, view cleaning maps, perform spot cleaning, set the timer and monitor the progress even when you are far from home.

Coredy D400 Robot Vacuum Cleaner

Coredy D400

In addition to the smartphone app, you can control this robot more conveniently by pairing it to an Amazon Alexa device or the Google Assistant so that you can use your voice to tell the robot what to do without lifting a finger. If you prefer to do things the old fashioned way, the robot vacuum comes with a physical remote control that you can also use to control the device.

It’s also important that you should be able to set boundaries and no-go zones for the robot so that it can know which parts of your home are off-limits. This robot comes with two boundary strips for this purpose. Each of these strips is 6.6 feet long. To use them, you only need to place them on the floor before the restricted area and the robot will detect them and turn around.

Battery Performance

The battery is another important component of any robot vacuum so let’s find out how the Coredy D400 performs. The battery in this robot vacuum is a 2600mAh lithium-ion battery. It is capable of powering the robot for up to 120 minutes before the need for recharging comes up again.

Coredy D400 Robot Vacuum

Coredy D400

This is quite a long time that should be enough for vacuuming almost any room regardless of how large it may be. When vacuuming is complete, the vacuum will automatically find its way to the charging dock and if the battery runs low during a cleaning job, it will also go back to the charging dock for a charge. This way, the robot will always be fully charged and ready to clean whenever you need it.


Despite being in the low budget range, the Coredy D400 Robot Vacuum does a splendid job of taking over the vacuuming of floors. It has a large dust collection bin that will ensure that you won’t have to empty every few minutes, while at the same time remaining compact enough to fit in tight spaces thanks to its 2.77-inch height.

The manufacturers were able to fit some high-end features into this compact entry-level vacuum cleaner. Some of these features include voice control, smartphone app control, smart mapping, and smart navigation. It has a long battery life and will automatically head back to the charging dock when the battery runs low. It will, however, not resume the cleaning job after the charge. You will have to manually restart the cleaning job.

Coredy D400 Robot Vacuum Review

Recommended Robot Vacuum Cleaners
Best of the
Best For Tight Spaces Budget Pick
(< $200)
iRobot Roomba s9+ (9550) eufy BoostIQ RoboVac 11S MAX Ecovacs Deebot N79S
iRobot Eufy Ecovacs
s9+ 11S MAX N79S
Continuous 100 min 110 min
12.2 x 12.2 x 3.5 in 17.8 x 13.7 x 4.8 in 33 x 33 x 7.8 in
20 pounds 5.73 pounds 7.05 pounds

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