The Litter-Robot 4 Is the Best of the 23 Automatic Litter Boxes We've Tested — Get $150 Off for a Limited Time (2025)

We’ve tested 23 automatic litter boxes over the years, both in our New York testing lab and in our homes, and a clear winner emerges each time: the Litter-Robot 4. It’s quiet, it’s easy to clean, the app is useful and simple, and our cats (and their owners) have loved it. Plus, the convenience of a self-cleaning litter box is an alluring promise. No more scooping litter! No more smell!

While this top pick is normally available for $700, right now, you can save up to $100 on a Litter-Robot 4 starter pack during the brand’s early Black Friday sale. This item rarely goes on sale—so if you’ve had your eye on this, now is the best time to buy it. The deal is only available on Litter-Robot.com, so be sure to purchase there. Also, The Spruce Pets readers can use the code "DDM50" for $50 off the Litter-Robot 4 or Litter-Robot 3 as standalone products or bundles, and it stacks on top of the discounts — meaning you can save up to $150.

Our editors and testers love this litter box. To sum up: “It's a really high-quality machine that gets the job done and is really convenient to use,” one tester said. And the cat families of Reddit seem to agree, with one Redditor calling it life-changing.

Find the best deals happening now on the Litter-Robot 4, and read our full review to determine whether it’s a fit for your feline and family.

The Best Litter-Robot 4 Deals Right Now

The brand is holding its Black Friday sale early, so take advantage of these great deals while they’re available! While they have markdowns available on several of their products (including several Litter-Robot 3 products and bundles), here are the best deals on Litter-Robot 4. As mentioned, these products are rarely on sale, so make sure to buy before they’re over! These deals end January 3, 2025.

Prices below already reflect the onsite deal prices. But remember, using the code "DDM50" can get you another $50 off on top of these deals!

Save $100 on these Litter-Robot 4 bundles:

• Litter-Robot 4 Kickstart Bundle ($714 with discount)
• Litter-Robot 4 Connected Home Bundle ($1,048 with discount)
• Litter-Robot 4 Litter Hopper Bundle ($849 with discount)

Save $80 on these Litter-Robot 4 bundles:

• Litter-Robot 4 Warranty Bundle ($719 with discount)
• Litter-Robot Best Friends Bundle ($704 with discount)
• Litter-Robot 4 Trap Bundle ($819 with discount)
• Litter-Robot 4 Starter Bundle ($859 with discount)
• Litter-Robot 4 Reconditioned Bundle ($604 with discount)
• Litter-Robot 4 Coastal Credenza Bundle ($1,218 with discount)
• Litter-robot 4 Storage Cabinet Bundle ($1,118 with discount)
• Litter-Robot 4 Clean Bundle ($924 with discount)
• Litter-Robot 4 Essential Bundle ($869 with discount)

If you’re in the market for two litter-robots, you can save $200 on the Litter-Robot 4 Double Bundle ($1,398 with discount).

The Litter-Robot 4 Is Convenient and Odor-Free

Undoubtedly the most important benefits of this automatic litter box are reducing odor and eliminating the task of scooping litter.

When the drawer needs emptying, the app or a light on the control panel will alert you. Simply pull out the drawer, remove and dispose of the bag containing the waste, and—voila!—you’re done. The Litter-Robot 4 comes with three plastic liners, and our tester also noted that when she ran out of those liners, small garbage bags did the trick.

“I don't have to clean it daily, which makes traveling easier,” said one tester. “We went on a week-long trip during testing and our cat sitter loved that she didn't have to worry about the litter, which left more time to play with our cats.”

In some of our tests, we did notice a slight but present smell coming from the Litter-Robot 4. That’s because—like most automatic litter boxes we’ve tested—it works by separating your cat’s solid waste from the litter and depositing it into a separate compartment, no longer masked by the litter meant to contain or absorb the smell.

According to our testers, however, that hasn’t been much of an issue, and it’s still better than any regular litter box odor. “I haven't smelled any cat litter or waste since starting with this litter box,” said one tester. “I think a combination of a large interior and the closed off waste drawer does a great job of immediately whisking away anything that would cause odors.”

The Litter-Robot 4 is especially useful for those in multiple-cat households. On a more obvious note, waste simply builds up more quickly when you have multiple cats, and it can be hard to stay on top of. Each of our testers lived in two-cat households and felt that the Litter-Robot 4 made their lives noticeably easier—and less smelly.

One more pro of this machine: it’s (fairly) quiet. In one Reddit thread, nearly every single commenter agreed on this, with multiple people chiming in that the Litter-Robot 4 is much quieter than its predecessor, the Litter-Robot 3, and that upgrade alone was worth it. “It’s nowhere near as loud as our dishwasher or washer and dryer, so it's certainly an acceptable volume,” said our tester. “And the noise doesn’t deter the cats.”

It’s Extremely Easy to Set Up and Use

The general consensus among our testers and Reddit users is how easy this is to set up—in fact, there’s practically no assembly or setup required. Our tester loved that “out of the box, this really just needed to be plugged in and it was good to go.” Another tester appreciated how the product comes fully assembled with instructions on how best to unbox it.

Five Steps for Setup:

• Place it: Make sure it’s near a power outlet and at least one inch away from the nearest walls, and set litter mats or rugs in front of it. Be sure to keep it on a firm, level surface.
• Download the App: This is how you’ll be able to control several functions remotely.
• Add litter: Clumping litter is required in the Litter-Robot 4—don’t use any that is non-clumping, loose-clumping, or made from newspaper or wood pellets.
• Begin the initial cleaning cycle: Plug in your Litter-Robot 4, and press the power button to begin the two-minute-long initial cleaning cycle.
• Introduce your cat: Some cats may adjust quickly while others will need more time. Keep the old litter box next to the Litter-Robot 4 for at least two to three days, One Redditor outlined their ten-step method for successfully acclimating their cats to their new litter box, noting that “it takes some time to get them used to it but [it’s] so worth it in the end!”

How to Use It:

Put simply, there’s not much you need to do. The Litter-Robot 4 keeps a supply of litter ready to go inside a fabric hammock. When your cat is done using the litter box, the sphere rotates to dispose of the litter through a filter that collects the solid waste into a reservoir and recycles clean litter to use again. It has an app and control panel for you to initiate certain features yourself—such as cycle, reset, and empty—but for the most part, it lives up to its “robot” name.

Cats Also Benefit From (and Enjoy!) This Litter Box

While we could go on and on about the perks of this litter box for humans, we also want to acknowledge the ways in which it benefits our feline companions—after all, they’re ones using this day in and day out.

First, the opening of the Litter-Robot 4 has proven very comfortable for cats, more so than the Litter-Robot 3. The entryway, at 15.75 inches all around, is more than five inches wider than that of its predecessor. “My cats absolutely love the size of it,” said one tester. “I do have two cats and it took some getting used to, but now they both use it far more than their original litter box.” Redditors seem to agree that the larger entryway alone makes the Litter-Robot 4 worth purchasing.

The Litter-Robot 4 also comes with some impressive smart features, such as being able to monitor the litter as well as your cat’s weight and usage of the litter box. In fact, one user on Reddit explained how the Litter-Robot 4 alerted them to their cat’s urinary tract infection before they would’ve noticed it. “We've only had our Litter-Robot 4 for a little over a month, and this week we used it to quickly detect a UTI in one of our four cats,” they said. “All four cats have distinct sizes, so when [it] logged seven weights for one cat within 15 minutes, I instantly realized something was wrong. Less than 24 hours later, we were able to submit a urine sample and both antibiotics and pain meds were on board. The ability to quickly detect the UTI and make our little old lady comfortable has sold me on LR4.”

As illustrated from their experience, the weight-tracking feature of the Litter-Robot 4 (another upgrade from the Litter-Robot 3) comes in handy when you need to keep track of multiple cats because each weight is associated with a specific cat.

Many Reddit users have upgraded from the Litter-Robot 3 to the Litter-Robot 4 and their cats prefer the 4. One commenter said definitively, “my cats all prefer the Litter-Robot 4, as do I.”

Final Thoughts

The Litter-Robot 4 stood out among all other automatic litter boxes in every one of our tests for its design, ease of use and cleaning, the overall impact on cleanliness, and impressive customer service when it came to replacing parts. Our testers felt that the Litter-Robot 4 had substantial design improvements over the Litter-Robot 3, including a wider entryway, better overall technology, and a significantly quieter presence. Redditors agreed that the Litter-Robot 4 is noticeably quieter than the Litter-Robot 3. In addition, the Litter-Robot 4 boasts a weight tracking feature that can be very helpful in tracking certain health conditions related to your cat’s bathroom habits.

One Reddit user commented that they “think of it as an appliance.” Another Reddit user said, “it was a very tough decision for me to spend that much money on the [Litter-Robot 4]. Ended up buying it after mulling it over weeks. If anything [were] to happen to my [Litter-Robot 4] now, I wouldn’t think more than a second to buy a new one to replace it … that’s how big of a quality of life change it’s been for me.”

The Litter-Robot 4: The Basics

• It measures 29.5 x 22 x 27 inches—similar in size to a mini fridge—with an entryway of 15.75 inches, and it weighs 24 pounds.
• It’s available in white and black. You can choose to add a slotted "handle" on the front or an optional step to make climbing in and out easier for your cats.
• The Litter-Robot 4 comes with a one-year warranty, plus a 90-day risk-free trial period. Reddit users noted the company’s excellent customer service and the ease of replacing parts if needed. “They replaced [their unit’s motor] for free and the replacement worked great … no further issues,” said one Redditor.