The Litter Robot 4 has been one of the most popular premium automatic litter boxes for years, and for good reason. It promises less scooping, better odor control, app alerts, and a cleaner daily routine for cat owners who are tired of dealing with a traditional litter box.
But there is now a bigger question: is the Litter Robot 4 still worth buying after the release of Litter Robot 5? The newer model brings more advanced smart features, but that does not automatically make the Litter Robot 4 outdated.
In this Litter Robot 4 review, we’ll look at how it performs for cleaning, odor control, app tracking, multiple cats, larger cats and daily maintenance. We’ll also explain where it still makes sense, where it falls short and whether you should consider Litter Robot 5 or another model instead. If you are still comparing broader options, you can also see our guide to the best automatic litter boxes.
Litter Robot 4 is still a strong premium pick in 2026
The Litter Robot 4 is still one of the safest premium automatic litter boxes to recommend if you want less scooping, better odor control, app alerts and a cleaner daily routine. The newer Litter Robot 5 is more advanced, but the Litter Robot 4 still covers the features most cat owners actually need.
What Is the Litter Robot 4?
The Litter Robot 4 is a premium automatic cleaning litter box from Whisker. Instead of using a rake or disposable tray system, it uses a rotating globe that separates clumped waste from clean litter after your cat leaves the box. The waste drops into a drawer below the unit, while the clean litter returns to the bed for the next use.
That design is one of the main reasons the Litter Robot has become such a recognizable name in automatic litter boxes. It does not remove litter maintenance completely, but it changes the job from daily scooping to emptying a drawer, topping up litter, and cleaning the unit when needed.
The Litter Robot 4 also connects to the Whisker app, where you can check waste drawer levels, litter levels, usage history, and weight-related tracking. For a single cat, those features are convenient. For more then 1 cat homes, they can be more useful because they help you notice patterns in how often the box is being used.
In simple terms, the Litter Robot 4 is best understood as a premium convenience upgrade. It is not a cheap litter tray replacement, and it is not completely hands-off. But if your main goal is to reduce scooping, improve odor control, and make litter box maintenance feel less constant, it is one of the most established options in the category.
Design and Size: Premium, But Not Small
The first thing most people notice about the Litter Robot 4 is its size. This is not a small litter box that disappears into a corner or fits easily inside a tiny bathroom cabinet. It looks more like a smart home appliance than a traditional litter tray, with a rounded globe design, a large front opening, and a base that needs enough floor space to sit level.
That size is not always a bad thing. The larger opening can make the Litter Robot 4 feel more approachable for many cats, especially compared with smaller enclosed automatic litter boxes. The cleaner exterior design also helps it look more intentional in a laundry room, bathroom, hallway corner, or dedicated pet area.
The trade-off is that you need to plan its location before buying. It needs to be near a power outlet, placed on a firm level surface, and positioned somewhere your cat can enter without feeling trapped. If your current litter box is hidden in a tight closet, under a low shelf, or inside a small cabinet, the Litter Robot 4 may require a bigger change to your home setup.
For larger cats, the wide entrance is one of its advantages, but interior space still matters. A cat needs enough room to step in, turn around, posture naturally, and leave comfortably. If your main concern is size, our guide to self cleaning litter boxes for large cats compares more options designed for bigger breeds and heavier daily use.
Litter Robot 4 Supply Bundle by Whisker
This bundle includes the Litter Robot 4 plus useful maintenance extras, making it a practical option if you want the main unit and starter supplies together.
- Litter Robot 4 automatic litter box
- 3 OdorTrap refills
- 10 waste drawer liners
- 30 cleaner wipes
- 2 carbon filters
- Black finish
Setup and Cat Transition: The Machine Is Easy, the Cat May Not Be!
Setting up the Litter Robot 4 itself is fairly simple. Once the unit is in place, you add suitable clumping litter, connect it to power, and pair it with the Whisker app if you want smart alerts and usage tracking. The more important step is choosing the right location: the box should sit on a firm, level surface where your cat already feels comfortable going.
The cat transition is usually the part that needs more patience. Some cats will inspect the Litter Robot 4 almost immediately, especially if they are curious or already used to covered litter boxes. Others may be unsure because the shape is different, the entrance is higher, and the unit moves during cleaning cycles.
A slower introduction usually works better than forcing the switch. Place the Litter Robot 4 near the old litter box at first, keep the old box available, and let your cat explore the new one without pressure. For nervous cats, it can also help to leave the automatic cycle turned off during the first stage so the movement does not surprise them before they have used it comfortably.
This is where expectations matter. The Litter Robot 4 can make litter maintenance much easier for the owner, but it still has to win over the cat. If your cat has always disliked enclosed boxes, sudden changes, or unfamiliar noises, give the transition more time and keep a backup option available until you are sure they are using it consistently.
Daily Cleaning Performance: Less Scooping, But Not Zero Work
The main reason most people consider the Litter Robot 4 is to reduce daily scooping. After your cat uses the box, the unit waits for the selected delay period, then rotates the globe to separate clumped waste from clean litter. The waste drops into the drawer below, and the clean litter returns to the main bed for the next use.
In daily life, this is where the Litter Robot 4 feels most valuable. Instead of finding a dirty litter box every time you walk past it, the litter bed usually looks cleaner between visits. That can make a noticeable difference if the box sits in a bathroom, laundry room, hallway, office, or any other space you use often.
For busy owners, the biggest upgrade is not having to scoop every day. For multi cat homes, the benefit is even clearer because the next cat is less likely to step into a box that already looks used. That cleaner routine is one of the reasons the Litter Robot 4 still feels premium, even now that newer automatic litter boxes are available.
Still, it is important to be realistic. The Litter Robot 4 is self cleaning, not self maintaining. You still need to empty the drawer, add fresh litter, wipe dirty areas, check for stuck clumps, and deep clean the globe occasionally. It reduces the most annoying part of litter box care, but it does not remove the need to maintain the box completely.
Odor Control: One of the Main Reasons to Buy It
Odor control is one of the strongest reasons to consider the Litter Robot 4. Because clumped waste is moved out of the main litter bed after each cleaning cycle, smells are not left sitting exposed in the box in the same way they are with a traditional tray. The waste drawer also helps keep used litter contained between emptying.
This can make a real difference if your litter box sits in a bathroom, laundry room, hallway, office, or any space where odor becomes noticeable quickly. It is also one of the reasons the Litter Robot 4 makes sense for several cat homes, where a normal litter box can start smelling much faster if it is not scooped often.
That said, the Litter Robot 4 does not make odor disappear completely. If the drawer is full, the inside of the globe needs cleaning, or the litter does not clump firmly enough, smells can still build up. Odor control depends on the machine, but also on how often you empty it and what litter you use.
For best results, use a firm clumping litter that sifts cleanly and does not leave wet residue behind. A weak litter can make even a premium automatic box seem less effective. If odor control is your main reason for upgrading, our guide to the best litter for automatic litter boxes explains what works better in self-cleaning models.
What Litter Works Best With the Litter Robot 4?
The Litter Robot 4 works best with a litter that forms firm clumps and sifts cleanly during the rotation cycle. This matters because the machine needs to separate used litter from clean litter without leaving too much wet residue behind inside the globe.
For most homes, a good clumping clay litter is usually the safest choice. It tends to form solid clumps, control odor well, and pass through the sifting system more predictably than lightweight, crystal, pellet, or weak-clumping formulas. If the litter breaks apart too easily, you may notice more residue, more odor, and more cleaning inside the unit.
That does not mean every non-clay litter is impossible to use, but it does mean you need to be more careful. Some natural litters can work if they clump firmly and are fine enough to sift properly, while others may create more dust, stick to the globe, or leave the waste drawer messier than expected.
The key is to treat litter choice as part of the system. The Litter Robot 4 can only perform as well as the litter inside it. If you are switching from a traditional box, it may be worth testing one litter at a time instead of changing both the machine and the litter type at once.
Waste Drawer and Maintenance: Easier Than Scooping, Still Regular
The waste drawer is where the Litter Robot 4 turns daily scooping into a simpler emptying routine. Instead of removing clumps by hand every day, you pull out the drawer, remove the liner bag, and replace it when needed. For many owners, that alone is the biggest quality-of-life improvement.
How often you empty the drawer depends on how many cats use the box and how often they go. A single-cat home may get more time between changes, while a multi-cat home should expect the drawer to fill faster. The app alerts help, but it is still worth checking the drawer regularly instead of waiting until odor or fullness becomes obvious.
The Litter Robot 4 also needs occasional cleaning beyond the drawer. Litter dust can collect around the entrance, sensors, and base. Clumps can sometimes leave marks inside the globe, especially if the litter is too wet, too lightweight, or slow to harden. A quick wipe now and then keeps the unit fresher and helps prevent small messes from becoming bigger cleaning jobs.
Deep cleaning is less frequent, but still part of ownership. The globe, liner, drawer area, and exterior should be cleaned when buildup starts to appear or when odor control drops. This is not difficult, but it is important to understand before buying: the Litter Robot 4 makes litter care easier, not maintenance-free.
Litter Robot 4 Promo
Includes the Litter Robot 4, 3 OdorTrap refills, 10 liners, 30 cleaner wipes, and 2 carbon filters.
Amazon link, bundle pricing and availability may change.App Features and Smart Tracking
The Whisker app is one of the reasons the Litter Robot 4 feels more premium than a basic automatic litter box. It lets you check the waste drawer level, monitor litter levels, receive notifications, and see usage activity without needing to inspect the box constantly.
For most owners, the most useful alerts are the simple ones. Knowing when the drawer is full or when litter needs attention makes the box easier to manage, especially if it is kept in a laundry room, bathroom, or another area you do not check every hour. It also helps prevent the common problem of realizing the drawer is full only after odor has already started to build.
The tracking features can be helpful too. If your cat suddenly starts using the litter box more often, less often, or at unusual times, that change may be worth paying attention to. The app is not a medical tool and it cannot diagnose health problems, but it can make changes in litter box behavior easier to notice.
This is especially useful in multi cat homes, where it can be harder to know which cat is using the box and how often. The Litter Robot 4 gives you more visibility than a traditional litter box, even if you still need to interpret the data carefully and keep an eye on your cats’ normal habits.
What Cats May Think of the Litter Robot 4
From the owner’s point of view, the Litter Robot 4 can look like an obvious upgrade. It keeps the litter bed cleaner, reduces scooping, and makes the whole routine feel more modern. From the cat’s point of view, though, it is still a large enclosed object that looks, smells, and moves differently from a normal litter box.
Many cats adjust well, especially if they are curious, confident, or already used to covered litter boxes. The cleaner litter bed can also be appealing because some cats dislike stepping into a box that already looks dirty. For those cats, the Litter Robot 4 may become part of the routine quickly once they understand what it is.
Other cats may need more time. Older cats, nervous cats, very large cats, or cats that strongly prefer open trays may hesitate before entering. The cleaning cycle can also be intimidating at first, which is why it is usually better to let the cat explore the box before relying on automatic cycling.
This is the main reason we would not describe the Litter Robot 4 as a guaranteed fit for every home. It is a strong automatic litter box, but the best litter box is still the one your cat will actually use. If your cat is cautious with new objects, plan for a gradual transition and keep the old box available until the new routine feels stable.
Is the Litter Robot 4 Good for Multiple Cats?
The Litter Robot 4 is especially useful in multi cat homes because it cleans the litter bed after each visit. With a traditional litter box, one cat may use the box and leave it unpleasant for the next. With the Litter Robot 4, waste is moved into the drawer automatically, so the next cat usually has a cleaner place to go.
That can make a noticeable difference if you have two or three cats sharing the same litter area. It also helps owners who struggle to keep up with frequent scooping, especially in busy households where the box can go from clean to messy very quickly.
The trade off is that everything fills up faster. The waste drawer needs emptying more often, the litter level drops sooner, and the unit may cycle several times a day. The app alerts help you keep track of that, but a multi cat home should still expect regular maintenance.
It is also worth keeping a backup litter box during the transition period. If one cat adapts quickly but another is nervous, the extra box can prevent accidents and reduce stress. For more multi-cat options, see our guide to the best automatic litter boxes for multiple cats.
Is the Litter Robot 4 Good for Large Cats?
The Litter Robot 4 is better suited to larger cats than many enclosed automatic litter boxes because it has a wide front opening and a more accessible entry than some compact models. For cats that already use covered litter boxes, that can make the transition feel less restrictive.
Still, large cat comfort is not only about whether the cat can physically get inside. Your cat needs enough room to step in, turn around, dig, posture naturally, and leave without feeling trapped. A bigger cat that feels cramped may avoid the box even if it technically fits.
This is especially important for Maine Coons, Ragdolls, and other larger breeds. Some confident large cats may use the Litter Robot 4 without much hesitation, while others may prefer a more open layout or a box with a different entrance style. Personality matters almost as much as size here.
If your cat is unusually long, tall, or cautious with enclosed spaces, it is worth comparing a few options before deciding. We cover that in more detail in our guide to automatic litter boxes for Maine Coons, where interior comfort and entry design matter more than simple product dimensions.
Litter Robot 4 vs Litter Robot 5: Should You Buy the Newer Model?
The Litter Robot 5 is now the newer and more advanced model, so it naturally changes how some buyers will look at the Litter Robot 4. If you want the latest version, the newest smart features, and the most future-facing option in the lineup, the Litter Robot 5 is the more obvious choice.
That does not automatically make the Litter Robot 4 outdated. For many homes, it still covers the features that matter most: automatic cleaning, strong odor control, app alerts, usage tracking, and a proven design with a large owner base. If your main goal is to stop scooping every day, the Litter Robot 4 may already do enough.
The decision mostly comes down to how much you care about having the newest technology. If you want the most advanced monitoring features and are comfortable paying more for the latest model, Litter Robot 5 is worth considering. If you want a premium automatic litter box that already solves the core litter box problems well, Litter Robot 4 still makes sense.
| Model | Best for | Main reason to choose it |
|---|---|---|
| Litter Robot 4 | Most cat owners who want a proven premium automatic litter box | Strong self-cleaning, odor control, app alerts, and a more established owner experience. |
| Litter Robot 5 | Tech-focused owners who want the newest model | More advanced monitoring features and the latest smart litter box technology from Whisker. |
For most buyers, the Litter Robot 4 remains the more practical recommendation if the price difference is meaningful and the newer features are not essential. The Litter Robot 5 is more appealing if you specifically want the newest version and plan to use the advanced monitoring features regularly.
Best Litter Robot 4 Alternatives to Consider
The Litter Robot 4 is one of the strongest premium automatic litter boxes, but it is not the only option worth considering. Some buyers may want a lower price, a different design, more interior space for larger cats, or a model that feels less bulky in the home.
One alternative we are currently testing is the HomeRunPet CS106. It is designed with a spacious interior, which makes it especially interesting for larger cats and households comparing premium auto cleaning litter boxes. Once our testing is complete, we plan to compare it more directly with the Litter Robot 4.
PETKIT is another major alternative, especially for owners who want a smart automatic litter box with a different footprint and a more compact, modern looking design. PETKIT models may appeal more to apartment owners or buyers who want automation without immediately jumping to the highest price tier.
If you are still comparing options, our full guide to Litter Robot alternatives is the best next step. You can also read our PETKIT vs Litter Robot comparison if you are mainly deciding between those two brands.
Who Should Buy the Litter Robot 4?
The Litter Robot 4 makes the most sense for cat owners who want a premium automatic litter box and are willing to pay more for convenience, odor control, and smart alerts. It is not the cheapest way to manage cat litter, but it can be a strong upgrade if daily scooping is one of the chores you most want to reduce.
It is especially useful for busy homes where the litter box gets used often and does not always get scooped as quickly as it should. If you work long days, travel occasionally, have multiple cats, or keep the litter box in a space where odor is noticeable, the Litter Robot 4 can make the whole routine feel cleaner and easier to manage.
The Litter Robot 4 is a good fit if:
- You want to reduce daily scooping without switching to disposable tray systems.
- You have one or more cats and want the litter bed to stay cleaner between visits.
- Odor control is a major concern, especially in a bathroom, laundry room, hallway, or apartment.
- You want useful app alerts for drawer levels, litter levels, and usage activity.
- You have enough space for a large automatic litter box near a power outlet.
- You prefer a proven premium model instead of jumping straight to the newest release.
The strongest case for the Litter Robot 4 is convenience. If your current litter box routine feels constant, messy, or easy to fall behind on, this is the type of upgrade that can make a real difference. It still needs maintenance, but the work becomes less frequent and usually less unpleasant.
Litter Robot 4 Supply Bundle by Whisker
This bundle includes the Litter Robot 4 plus useful maintenance extras, making it a practical option if you want the main unit and starter supplies together.
- Litter Robot 4 automatic litter box
- 3 OdorTrap refills
- 10 waste drawer liners
- 30 cleaner wipes
- 2 carbon filters
- Black finish
Who Should Skip the Litter Robot 4?
The Litter Robot 4 is a strong premium automatic litter box, but it is not the right choice for every cat or every home. The price is high, the unit is large, and it still needs regular cleaning, so it is not a good fit if you are expecting a completely hands off litter solution.
It may also be a poor match for cats that strongly dislike enclosed litter boxes. Some cats adjust well with a slow transition, but others simply prefer an open tray where they can step in and out without feeling surrounded. If your cat has rejected covered boxes before, you should be more cautious before spending this much.
The Litter Robot 4 may not be right if:
- You want the cheapest option possible and only need basic automatic scooping.
- Your cat hates enclosed boxes or is easily stressed by new objects and movement.
- You have very limited floor space and cannot place it near a power outlet comfortably.
- You do not want any maintenance, including drawer emptying, wiping, litter top-ups, and occasional deep cleaning.
- You specifically want the newest technology, in which case the Litter Robot 5 may be more appealing.
The safest way to think about it is this: the Litter Robot 4 is best for owners who want to make litter care easier, not owners who want to forget about litter care completely. If you are unsure whether the price makes sense, our guide on whether self cleaning litter boxes are worth it breaks down the pros, cons and realistic ownership trade offs.
Final Verdict: Is the Litter Robot 4 Still Worth It in 2026?
Yes, the Litter Robot 4 is still worth considering in 2026, especially if your main goal is to reduce daily scooping, improve odor control, and make litter box maintenance feel less constant. It is no longer the newest model in the lineup, but it still solves the core problems most cat owners care about.
The strongest reason to buy it is convenience. The litter bed stays cleaner between visits, the waste drawer makes cleanup easier, and the app alerts help you stay ahead of drawer levels and litter top ups. For busy owners or multi cat households, those small improvements can add up quickly.
The biggest reasons to hesitate are still price, size, and cat acceptance. The Litter Robot 4 is expensive, takes up noticeable space, and still needs regular maintenance. It also may not be the right fit for cats that dislike enclosed boxes or need a very gradual transition to new litter setups.
The Litter Robot 5 is the better choice if you specifically want the newest smart monitoring features and are happy to pay more for the latest version. But for most owners who simply want a proven premium automatic litter box that reduces scooping and keeps the litter area cleaner, the Litter Robot 4 still makes a strong case.
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