Last Updated: 2 months ago

With over 20 years of customer feedback driving product innovation, Litter-Robot 4 outsmarts the chore of scooping and gives Kitty a clean bed of litter for each use. 

Its new sensor and litter-sifting technology improve order control, cat safety, and home cleanliness. The sleek and compact design provides an open, comfortable space for up to four cats.

Plus, get a 90-day in-home trial, 1 year of WhiskerCare, and free shipping. With Litter-Robot 4, you can stop scooping cat litter and eliminate litter box odors.

So, if you are considering getting the Litter Robot 4 but you are unsure whether it is worth an upgrade, or if you have never bought a Litter Robot before, then this review is where you should be!

Unboxing the Litter Robot 4

litter robot 4

What makes it better?

  • Advanced self-cleaning mechanisms ensure minimal manual intervention.
  • A larger waste drawer capacity reduces the frequency of emptying.
  • An enhanced odor control system keeps the litter box area smelling fresh.
  • Wi-Fi connectivity for remote monitoring and control via a smartphone app.
  • Durable construction and high-quality materials for long-term reliability.

The Litter Robot line is a series of self-cleaning litter boxes that are fully automated.

This is only their fourth model, despite the brand having been established for over 20 years.

Setting up the Litter Robot 4 does not take as much effort as you would imagine for a device like this, and all you need to do is unpack it from the box and plug it in.

There is absolutely no construction required, and everything is done for you on that front.

The only thing that you need to add in is the carbon filter, but since this needs to be replaced eventually, it is good to know how to take it off and add it in from the get-go.

Litter RObot 4 Features

While, of course, the Litter Robot 4 comes with some upgrades from the previous model, it still keeps some of the same features that made the previous models so successful.

  • Easy setup
  • Self-cleaning
  • Less tracking
  • WiFi-connected
  • Multi-cat friendly
  • Real-time insights
  • Neutralizes odors

The main draw of the Litter Robot is that it is a self-cleaning system, and it deposits all of the waste that is in it into a drawer that is easy to empty and get rid of.

The system can also be used with multiple cats; the Litter Robot 4 is specifically designed for this, being suitable for up to four separate cats.

It connects to your Wi-Fi to stay linked to your mobile through a compatible app for notifications.

Users can also remotely control the unit and change certain features using the app. The device also has a nightlight built in that can be controlled.

This device is also pretty economical in how it uses litter, using less than a normal litter box. It is worth noting that you will need to use clumping litter for the device to work.

New Features Explained

cat in litter robot 4

Weight Sensors

Our favorite addition that helps the Litter Robot 4 stand out is that it features weight sensors that work as scales every time your cat uses the Litter Robot 4.

This is great, especially when you have multiple cats using the Litter Robot 4.

You will be able to see the weight of the cat after they have used the Litter Robot 4, which means that you will be able to discern which cat has been using the Litter Robot 4.

SafeCat System

One other new feature that helps the Litter Robot 4 stand out is that the rotating globe, which is the main part of the device, has a sift that is now located inside the unit, which makes it a lot safer for your cat to use.

The device also has the SafeCat system, which uses omnisense sensors in conjunction with the optical and weight sensors to ensure that the system knows what your cats are doing. 

This SafeCat system has plenty of practical uses. For example, it lets the device know when cats are inside the globe to ensure that it will stop rotating when they try to enter the device.

It is also used to display when something has pinched while rotating, and it will then stop the cycle. These sensors will also track the waste drawer’s fill level and monitor your litter quantity to indicate when more is needed.

The sensors are also used with the nightlight, so it knows when to turn it on.

Waste Drawer Upgrage

The waste drawer on the Litter Robot 4 does come with some liners, but you can use a standard trash bag if this is what you want, and this can save you some money even if they are sometimes a bit large.

The waste drawer also seals quite tightly and uses carbon filters, so very little odor will escape, making this device a lot more pleasant to have in the house.

Whisker APP

Whisker Litter-Robot 4
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Something that elevates the functionality of the Litter Robot 4 is the Whisker app, which is used with the device.

The app works with previous Litter Robots and offers additional features designed for the Litter Robot 4.

For example, the Litter Robot 4 gives the Whisker app live updates on just how full the waste drawer is, and it also lets you know if you will need to add litter too. These features make using the Litter Robot 4 a lot easier.

The Whisker app will also let you look at the usage history, which is where you can see just how often the device has been used and the weight of the cat using it each time.

This can let you discern which cat has been using it where. This is great for monitoring the health of your different cats, and you can tell if there is one specific cat that is not using the device.

You can download the app for iOS here and for Android here.

Pros and Cons of Using Litter Robot 4

cat litter robot 4


  • Monitoring your cat’s health and litter box status directly from your phone with the WiFi-enabled design and the Whisker app.
  • You can accommodate up to 4 cats of any size and breed with the spacious and comfortable MultiCatTM design.
  • With advanced litter-sifting technology, you can ensure a clean and fresh litter bed for every use.
  • Eliminating litter box odors with the optional OdorTrap® system that seals the waste drawer and uses carbon filters or OdorTrap® packs.
  • Reduce the noise and stress for your cat with the QuietSiftTM feature, which lowers the volume of the self-cleaning cycles.
  • Risk-free trial, a long warranty, and free shipping with the litter robot 4.


  • Initial investment cost may be higher compared to traditional litter boxes.
  • Requires electricity to operate, limiting placement options.
  • Some cats may take time to acclimate to the self-cleaning process.
  • Maintenance and troubleshooting may require technical knowledge.
  • Larger size may not be suitable for small living spaces.

Click here to download Litter Robot 4 manual

Litter Robot 4 vs. Litter Robot 3

litter robot 4 vs. litter robot 3

A lot of people who are considering buying the Litter Robot 4 are, of course, users of the previous Litter Robot 3, so you are likely wondering if this device is worth the upgrade.

1. Size

These products are actually quite similar in size, but the main difference is how much larger the entryway is for the Litter Robot 4, which makes it a bit roomier.

The Litter Robot 4 can accommodate up to 4 cats, whereas the Litter Robot 3 is limited to 3 cats.

2. Waste Drawers

The waste drawer for the Litter Robot 3 looks bigger because of how much longer it is; however, the drawer for the Litter Robot 4 is a lot deeper, which means that it has a noticeably larger capacity, meaning you will not have to empty it as often.

It also seals a lot tighter and lets less odor escape with a more strategically placed carbon filter.

There were also common complaints that the waste in the Litter Robot 3 would accumulate at the sides, but this is not an issue for the Litter Robot 4.

3. Control Panel

The control panel for the Litter Robot 4 has been moved a lot higher than where it was on the Litter Robot 3, and this makes it a lot easier to view the status indicator as well

To indicate the device’s status, the Litter Robot 3 uses smaller lights on the bottom.

In contrast, the Litter Robot 4 has a light bar that changes colors and flashes to indicate different things.

It is much easier for you to read; unfortunately, though, it only uses signals and no words, so you will need to learn what these mean, but there are not that many, so this is not too difficult to learn.

4. Noise Level

The Litter Robot 3 is not a super loud device, but in comparison to the Litter Robot 4, it definitely feels like it is.

This comparison is especially apparent when the device is rotating, where the Litter Robot 4 is designed to be a lot quieter and the Litter Robot 3 makes a noticeable amount of noise.

Is it Worth It?

If you are tired of a manual litter box, then the Litter Robot 4 is a great device to invest in!

As you can see from this review, the Litter Robot 4 has plenty of features that make it super useful!

What is your experience? Did your cat liked the product? Please share in the comments below.

Olfa T
Olfa T

Olfa knows how to get things done and has a keen business sense that others admire. She’s always on the go, coming up with new ideas! Her ability to anticipate the needs of her readers and deliver information that they want is what makes CatVills such a success. She loves cuddling her cat Picaciu. He is her inspiration.

Last update on 2024-05-09 / Affiliate links / Images from Amazon Product Advertising API