I'm a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for me to earn fees by linking to Amazon.com and affiliated sites.
Spending $700 or more on a self-cleaning litter box is a major purchase. Spending another $100 or $200 for upgraded features makes the decision even more complicated.
That’s exactly the problem with choosing between the Litter-Robot 4, Litter-Robot 5, and Litter-Robot 5 Pro.
All three automatically separate waste from clean litter, connect to the Whisker smartphone app, and help reduce the daily chore of scooping. They also monitor litter box visits and can track your cat’s weight.
But the newest models add features that go beyond automatic cleaning.
The Litter-Robot 5 introduces WasteID technology, a larger interior, more waste capacity, and upgraded controls. The Litter-Robot 5 Pro adds two integrated cameras, allowing owners to view activity inside the machine and, with an optional subscription, identify individual cats visually.
Those upgrades sound appealing, but do they actually improve the job of cleaning litter?
For most new buyers, we recommend the Litter-Robot 5. Its larger waste drawer and improved capacity offer practical everyday benefits for a relatively modest increase over the Litter-Robot 4.
However, the Litter-Robot 4 remains an excellent value, especially if you find it discounted. And while the 5 Pro offers the most advanced monitoring features, not every household needs cameras pointed at its litter box.
Here’s how the three models compare, where the extra money goes, and which one makes the most sense for your cats.
Quick Verdict: Litter-Robot 4 vs 5 vs 5 Pro
Choose the Litter-Robot 4 if: You want automatic litter cleaning, app notifications, and cat weight tracking at the lowest price of these three models. It’s also the most sensible choice if you’re happy with the one you already own.
Choose the Litter-Robot 5 if: You’re buying a new automatic litter box and want more waste capacity, a larger interior, WasteID technology, and better onboard controls without paying for cameras.
Choose the Litter-Robot 5 Pro if: You have multiple cats, particularly ones that are difficult to distinguish by weight, and want camera-based identification, video monitoring, and more detailed information about individual litter box visits.
The important distinction is that all three perform the same fundamental task: automatically sifting waste into a covered drawer.
The upgrades mainly affect convenience, capacity, and monitoring rather than eliminating an entirely new household chore.
Litter-Robot 4 vs 5 vs 5 Pro: Comparison Table
Feature | |||
|---|---|---|---|
 |  |  | |
Recommended maximum cats | 4 | 5 | 5 |
Supported cat weight | 3–25 lbs | 3–30 lbs | 3–30 lbs |
Automatic cleaning | Yes | Yes | Yes |
Waste drawer emptying, one cat | About 8 days | About 10 days | About 10 days |
WasteID identification | No | Yes | Yes |
Weight tracking | Yes | Yes | Yes |
Smartphone app | Yes | Yes | Yes |
Built-in cameras | No | No | Two 1080p cameras |
Visual cat identification | No | No | With Whisker+ |
Interior headroom | 16.5 inches | 17.5 inches | 17.5 inches |
Control interface | LED controls | LCD screen | LCD screen |
Footprint | 22 × 27 inches | 22 × 27 inches | 22 × 27 inches |
Required subscription | No | No | No for basic operation |
Price |  | | |
Pricing and specifications reflect Whisker’s published U.S. product information in October 2026. Waste drawer emptying intervals are manufacturer estimates, not guarantees. Advanced camera and monitoring features require Whisker+.
1. Cleaning Performance: Does the Litter-Robot 5 Actually Clean Better?
The main reason to purchase a Litter-Robot is simple: you don’t want to scoop the litter box manually after every use.
Fortunately, this is something all three models are designed to handle.
Each uses a rotating globe that separates clumped waste from reusable litter. Once your cat leaves and the selected waiting period passes, the globe rotates to sift litter through an internal screen.
Clean litter is retained while clumps and solid waste drop into a drawer beneath the unit.
When the cleaning cycle finishes, the globe returns to its normal position.
Litter-Robot 4: Already handles the essential task
The Litter-Robot 4 uses Whisker’s QuietSift cleaning technology and a sealed waste drawer with odor-control features.
It also includes sensors that help detect when a cat enters or uses the unit.
For many households, the result is a substantial reduction in routine scooping.
You still need to empty the drawer, add fresh litter, clean the globe periodically, and maintain the machine, but you no longer have to manually remove waste after every visit.
That’s the most important benefit of the product, and the Litter-Robot 4 already provides it.
Litter-Robot 5: Smarter cleaning decisions
The biggest cleaning-related difference in the Litter-Robot 5 is WasteID.
Rather than treating every litter box visit identically, WasteID attempts to distinguish between urine and solid waste.
This matters because the two types of waste benefit from different cleaning timing.
Urine generally needs time to form firm clumps in clumping litter. Running a cleaning cycle too early can result in poorly formed clumps that break apart.
Solid waste, meanwhile, can create unpleasant odors while sitting exposed in the globe.
WasteID is designed to respond to these differences by adjusting cleaning behavior based on the type of waste detected.
That makes the feature potentially useful, especially for owners concerned about odor or incomplete clumping.
However, it doesn’t mean the Litter-Robot 5 will always remove waste more effectively than the 4. Litter quality, cleaning settings, your cat’s habits, and regular maintenance still matter.
Whisker also states that WasteID may improve its accuracy as it learns a household’s routines, typically over about 30 days.
Does the 5 Pro clean better than the standard 5?
Not necessarily.
The Litter-Robot 5 and 5 Pro share the same core self-cleaning technology, WasteID functionality, and waste capacity.
The additional money for the Pro primarily purchases camera-based monitoring rather than a fundamentally more effective sifting mechanism.
Cleaning winner: Litter-Robot 5 and 5 Pro for WasteID. But the Litter-Robot 4 already handles routine automatic cleaning, so the difference isn’t automatically worth replacing a working machine.
2. Waste Drawer Capacity: A More Useful Upgrade Than It Sounds
If you’ve never owned a self-cleaning litter box, it’s easy to focus on cleaning technology while overlooking something equally important: how often you’ll need to empty the waste drawer.
A machine that automatically cleans after every visit still creates work when its waste drawer fills.
This is one of the more practical reasons to consider the newer Litter-Robot models.
Litter-Robot 4
Whisker estimates that the Litter-Robot 4 can go approximately eight days between waste drawer emptying for a household with one cat.
This is considerably more convenient than scooping manually every day.
However, the estimate will vary with your cat’s size, diet, litter usage, and bathroom habits.
Litter-Robot 5 and 5 Pro
The newer models feature a larger waste drawer and improved waste distribution.
Whisker estimates up to approximately 10 days between emptying for a single-cat household.
The difference between eight and 10 days might not sound significant, but it can make weekly cleaning routines easier.
For example, if you’re accustomed to emptying the Litter-Robot 4 every weekend, the additional capacity may give you a little more flexibility before receiving a full-drawer notification.
It also matters in homes with multiple cats, where the drawer may fill substantially faster.
However, the 10-day estimate shouldn’t be interpreted as permission to leave waste sitting indefinitely. Odor, moisture, and hygiene still need attention.
Waste capacity winner: Litter-Robot 5 and 5 Pro.
This is one of the upgrades that can improve everyday ownership without requiring you to use additional smart features.
Feature | |||
|---|---|---|---|
| | | |
Recommended maximum cats | 4 | 5 | 5 |
Supported cat weight | 3–25 lbs | 3–30 lbs | 3–30 lbs |
Automatic cleaning | Yes | Yes | Yes |
Waste drawer emptying, one cat | About 8 days | About 10 days | About 10 days |
WasteID identification | No | Yes | Yes |
Weight tracking | Yes | Yes | Yes |
Smartphone app | Yes | Yes | Yes |
Built-in cameras | No | No | Two 1080p cameras |
Visual cat identification | No | No | With Whisker+ |
Interior headroom | 16.5 inches | 17.5 inches | 17.5 inches |
Control interface | LED controls | LCD screen | LCD screen |
Footprint | 22 × 27 inches | 22 × 27 inches | 22 × 27 inches |
Required subscription | No | No | No for basic operation |
Price | | | |
3. WasteID: What Does It Actually Do?
WasteID is one of the biggest selling points separating the Litter-Robot 5 generation from the Litter-Robot 4.
Whisker describes it as technology that identifies whether a litter box visit involved urine or feces.
That information supports cleaning decisions and more detailed bathroom activity monitoring.
For example, detecting solid waste may allow the machine to cycle sooner to help reduce odors.
Detecting urine may call for a longer delay, allowing clumping litter to absorb moisture and form a more solid clump before cleaning.
This is different from the standard approach of simply initiating a cleaning cycle after a predetermined waiting period.
Is WasteID worth the extra $100?
It depends on what bothers you about your existing litter box.
If you frequently deal with lingering solid-waste odors or clumps that don’t have enough time to form properly, WasteID’s approach could be appealing.
It also adds another category of information about your cat’s bathroom habits.
However, WasteID isn’t a diagnostic system.
It cannot determine whether a cat has a urinary tract infection, kidney disease, constipation, or another medical condition.
You still need to pay attention to your cat’s behavior, appetite, hydration, and overall health.
Frequent attempts to urinate, straining, discomfort, or little to no urine production require prompt veterinary attention. Suspected urinary obstruction is an emergency.
WasteID is best understood as a convenience and monitoring feature, not a replacement for veterinary care.
Our assessment: Worth considering when buying a new machine, but probably not enough by itself to justify replacing a well-functioning Litter-Robot 4.
4. Litter-Robot 5 Pro Cameras: Useful Upgrade or Expensive Extra?
The Litter-Robot 5 Pro’s defining feature is its integrated dual-camera system.
It includes two 1080p HD cameras with night vision.
One camera faces outward toward the entry area, while another monitors activity inside the globe.
This allows owners to view their cat’s litter box activity remotely and access video-related information through the Whisker app.
For some households, that information may be valuable.
For others, it may be unnecessary.
How camera-based identification helps multi-cat households
The Litter-Robot 4 and standard Litter-Robot 5 use SmartScale technology to help distinguish cats by weight.
This is useful when the animals weigh noticeably different amounts.
However, imagine you have two cats weighing approximately 11 pounds each.
If their weight readings are close together, the scale may have difficulty determining which cat visited the machine.
The Litter-Robot 5 Pro introduces visual identification using its camera system.
With a Whisker+ membership, its AI-powered identification features can help distinguish individual cats based on their appearance.
This can provide more individualized information about bathroom routines.
The system is designed for households with up to five cats.
However, facial identification is not guaranteed to be perfect. Similar-looking cats, lighting, positioning, and other conditions may affect accuracy.
Whisker states that its identification system improves as it learns from repeated use.
Can you watch your cat without a subscription?
Yes, but with limitations.
The Litter-Robot 5 Pro provides free basic video features, including up to five minutes of live streaming per day and access to recorded events under its standard features.
Whisker+ adds unlimited live streaming, visual cat identification, and expanded video history.
That means buying the Pro doesn’t automatically give you unrestricted access to everything its cameras can do.
Do you actually need cameras in a litter box?
Most households probably don’t.
If your cat uses the litter box consistently and you simply want waste removed automatically, cameras add little to the fundamental cleaning process.
However, they may be worthwhile if you have multiple cats that are difficult to distinguish by weight or want more detailed observation of litter box routines.
The key question is whether you’ll actually use that additional information.
Camera winner: Litter-Robot 5 Pro, exclusively. It’s the only model here with integrated video monitoring, but its most advanced camera features require an additional membership.
5. Size and Cat Capacity: Which Is Better for Large Cats?
All three machines occupy a similar amount of floor space.
According to Whisker’s comparison chart, the Litter-Robot 4, 5, and 5 Pro each have a footprint of approximately 22 by 27 inches.
However, their internal dimensions differ.
Measurement | Litter-Robot 4 | Litter-Robot 5 | Litter-Robot 5 Pro |
|---|---|---|---|
Exterior height | 29.5 inches | 29.9 inches | 29.9 inches |
Interior headroom | 16.5 inches | 17.5 inches | 17.5 inches |
Entry width | 15.75 inches | 15.75 inches | 15.75 inches |
Empty machine weight | 24 lbs | 28.7 lbs | 29.6 lbs |
Cat weight range | 3–25 lbs | 3–30 lbs | 3–30 lbs |
The newer models provide approximately one additional inch of interior headroom.
This may be helpful for larger cats that prefer more space to turn around.
For example, owners of large Maine Coons may appreciate the slightly roomier interior.
However, weight ranges and interior measurements cannot guarantee comfort for every cat.
Some cats dislike enclosed litter boxes regardless of their size. Others may be hesitant about stepping into a rotating globe.
The Litter-Robot 5 and 5 Pro are designed to accommodate cats weighing up to 30 pounds, compared with 25 pounds for the Litter-Robot 4.
Whisker recommends the Litter-Robot 4 for up to four cats and the newer models for up to five.
These are manufacturer capacity guidelines, not guarantees that every five-cat household will be comfortable sharing one litter box. Cats with territorial conflict, litter box avoidance, or medical problems may need additional conventional boxes.
Size winner: Litter-Robot 5 and 5 Pro. They provide more interior space without increasing the floor footprint substantially.
6. Controls, Flooring, and Maintenance: What Changed?
The Litter-Robot 5 generation improves more than just monitoring technology.
Better onboard controls
The Litter-Robot 4 relies on an LED control panel and status indicator lights.
That system provides feedback about the machine’s operation, but it can require referring to instructions to understand certain indicators.
The Litter-Robot 5 and 5 Pro introduce an LCD screen, which can make checking settings and interpreting machine status more straightforward.
This is a modest improvement, but it may be convenient for owners who prefer making adjustments directly on the device.
More flexible floor placement
The newer models are designed to work on different flooring types without requiring the separate Carpet Tray accessory used to support accurate weight readings on some Litter-Robot 4 installations.
This is useful if your only practical placement area is carpeted.
However, make sure the machine is stable and level, and follow Whisker’s placement instructions.
What about cleaning the machine?
All three still require routine maintenance.
You’ll need to empty and replace waste drawer liners, refill litter, clean the globe, inspect the waste drawer, and keep the sensor areas free from debris.
The newer models do not eliminate deep cleaning.
Litter can still accumulate in corners or on interior surfaces, and the globe liner will still need attention.
If your primary reason for upgrading is that you dislike occasionally washing your existing machine, the Litter-Robot 5 probably won’t solve that problem.
Convenience winner: Litter-Robot 5 and 5 Pro. The LCD interface, flooring flexibility, and greater capacity offer meaningful but incremental improvements.
7. Do You Need a Subscription for Litter-Robot 4, 5, or 5 Pro?
No. All three machines can perform their core self-cleaning functions without a paid Whisker+ membership.
You can also continue using basic Whisker app features, including supported weight tracking and limited activity history.
Whisker+ is an optional service designed to unlock more detailed insights and, for the Litter-Robot 5 Pro, expanded camera functionality.
As of October 2026, Whisker lists two membership options:
Whisker+ plan | Price |
|---|---|
Monthly | $7.99 |
Annual | $79.90 |
30-day introductory trial | Free |
The annual membership works out to approximately $6.66 per month when paid upfront.
For a household using the same annual plan for three years, that would amount to $239.70 in subscription fees.
What does Whisker+ unlock?
Across compatible Litter-Robot models, Whisker+ offers more detailed activity summaries, extended history, and routine-monitoring insights.
On the 5 Pro, it also unlocks features such as unlimited video streaming, visual cat identification, and up to 30 days of video history.
Whisker states that a single membership can enhance multiple compatible devices connected to the account.
Is Whisker+ worth it?
For owners of the Litter-Robot 4 or standard 5, the answer will often be no.
The free features already provide much of what most people need, including automatic cleaning and basic monitoring.
For owners of the 5 Pro, the subscription matters more because visual identification and expanded video features are central reasons to purchase that model.
If you’re not interested in paying for Whisker+, consider whether the 5 Pro is worth an additional $100 over the regular Litter-Robot 5.
In many cases, it won’t be.
8. Three-Year Ownership Cost: Which Litter-Robot Offers the Best Value?
The difference between models becomes clearer when you compare ownership over several years rather than focusing only on the initial purchase.
All three use litter, liners, electricity, and other consumables. Those costs vary by household, so the comparison below focuses on hardware and optional Whisker+ membership.
Three-year cost | Litter-Robot 4 | Litter-Robot 5 | Litter-Robot 5 Pro |
|---|---|---|---|
Starting hardware price | $699 | $799 | $899 |
Without Whisker+ | $699 | $799 | $899 |
With 3 annual Whisker+ plans | $938.70 | $1,038.70 | $1,138.70 |
Illustrative costs before sales tax, litter, liners, filters, optional accessories, and warranty extensions. Assumes Whisker+ remains $79.90 annually for three years.
The price difference between each hardware tier is $100.
For a first-time buyer, that makes the Litter-Robot 5 an appealing middle ground.
You receive the larger waste drawer, extra interior space, WasteID technology, and improved controls for an additional $100 over the Litter-Robot 4.
Moving from the 5 to the 5 Pro costs another $100.
That may look reasonable until you consider that some of the camera features require Whisker+.
If you plan to use the advanced camera features over three years, the actual additional expense compared with a subscription-free Litter-Robot 5 could be approximately $339.70.
That’s the $100 hardware difference plus $239.70 in three annual memberships.
The subscription also adds the advanced activity features available on other compatible models, so it isn’t exclusively a camera fee.
What about accessories?
Whisker sells optional products such as litter mats, replacement filters, liners, additional steps, and its LitterHopper automatic litter-refilling accessory.
The LitterHopper is especially relevant because it can reduce how often you need to add fresh litter manually.
Whisker offers LitterHopper-compatible products and bundles, although compatibility, availability, and included accessories depend on the model.
Be careful when comparing bundles against individual machines. A package with an extended warranty or accessories may appear more expensive while including items you planned to buy separately.
The best approach is to compare the exact machine price first, then add only the accessories you actually need.
9. Is It Worth Upgrading From Litter-Robot 4 to 5?
If you already own a working Litter-Robot 4, this is probably the most important question.
And for most owners, our answer is no.
The Litter-Robot 4 already provides automatic waste separation, a covered drawer, activity information, and cat weight tracking.
Those are the features responsible for most of the convenience.
Upgrading doesn’t eliminate the need to empty the drawer, refill litter, or perform periodic cleaning.
It also won’t necessarily make your cat more willing to use an automatic litter box.
When upgrading could make sense
An upgrade becomes more compelling if:
- Your existing machine is reaching the point where major repairs or replacement are necessary.
- You have a particularly large cat that would benefit from the newer interior dimensions.
- Your household has grown to include more cats.
- You want WasteID’s differentiated cleaning timing and monitoring.
- You specifically want the 5 Pro’s camera-based identification.
Otherwise, paying several hundred dollars to replace a functioning Litter-Robot 4 is difficult to justify based on convenience alone.
If you’re happy with your current machine, consider maintaining it rather than replacing it simply because a new version exists.
10. Litter-Robot 5 vs 5 Pro: Is the Camera Worth $100 More?
Unlike the difference between the Litter-Robot 4 and 5, the difference between the standard 5 and 5 Pro is easier to understand.
Both machines provide substantially the same cleaning system, interior dimensions, waste capacity, and WasteID technology.
The Pro adds the dual-camera system.
That means the decision comes down to whether you want video monitoring and visual cat identification.
When the 5 Pro makes sense
Imagine you own three cats, two of which have nearly identical weights.
A weight-based identification system may struggle to determine which cat is visiting the machine.
If you’re especially interested in monitoring individual bathroom patterns, the 5 Pro’s visual identification could provide useful additional information with Whisker+.
The cameras may also help you observe what happens during a visit, rather than relying solely on the time and weight information in the app.
When the standard 5 is better
If you have one cat, or several cats with sufficiently different weights, the standard 5 already provides useful monitoring features.
You also get the same automatic cleaning technology without cameras.
And there’s no need to consider paying for advanced video services.
Our recommendation: Buy the standard Litter-Robot 5 unless you have a clear reason to use the cameras. An extra $100 for hardware you rarely use isn’t particularly good value.
11. Which Litter-Robot Is Best for Your Household?
Your situation | Best choice | Why |
|---|---|---|
Buying your first automatic litter box | Litter-Robot 5 | Best balance of capacity and features |
Want the lowest upfront price | Litter-Robot 4 | Same essential cleaning function |
Already own a working Litter-Robot 4 | Keep the 4 | Limited reason to replace it |
Have multiple similar-weight cats | Litter-Robot 5 Pro | Optional visual cat identification |
Have a particularly large cat | Litter-Robot 5 | Roomier interior and 30-lb range |
Want to avoid subscriptions | Litter-Robot 5 | Strong standard features without Whisker+ |
Want detailed video monitoring | Litter-Robot 5 Pro | Dual integrated cameras |
Want fewer waste drawer emptying trips | Litter-Robot 5 or 5 Pro | Larger waste capacity |
A note for kittens and hesitant cats
Whisker lists a minimum weight of three pounds for automatic operation across these three models.
Smaller kittens may be able to explore the unit with the automatic cycling disabled, under appropriate supervision, but the manufacturer advises waiting until they meet the minimum weight for automatic operation.
Also, not every cat likes enclosed litter boxes or the sounds and movement of an automatic cleaning cycle.
Introduce the machine gradually, follow the acclimation instructions, and maintain access to an appropriate familiar litter box during the transition.
Don’t force a frightened cat into the machine.
Frequently Asked Questions
Is the Litter-Robot 5 better than the Litter-Robot 4?
The Litter-Robot 5 adds a larger interior, increased waste capacity, an LCD screen, WasteID technology, and support for larger cats. These are useful improvements, but both provide automatic litter cleaning. Owners with a functioning Litter-Robot 4 may not benefit enough to justify upgrading.
What is the difference between Litter-Robot 5 and 5 Pro?
The Litter-Robot 5 Pro adds two integrated cameras for video monitoring and optional AI-powered visual cat identification. Both models share the same general cleaning technology, WasteID functionality, and waste capacity.
Does the Litter-Robot 5 Pro require a subscription?
No subscription is required for basic self-cleaning operation or its standard monitoring features. However, Whisker+ is required for advanced features such as unlimited video streaming, visual cat identification, and expanded video history.
Can Litter-Robot 5 Pro tell which cat used the litter box?
With Whisker+, the 5 Pro uses camera-based AI recognition to help identify individual cats. This may be particularly valuable when multiple cats have similar weights. Identification accuracy can vary, and the system may need time to learn the household.
Does Litter-Robot 5 hold more waste than Litter-Robot 4?
Yes. Whisker advertises a larger drawer and improved waste distribution in the Litter-Robot 5 generation. The manufacturer estimates approximately 10 days between emptying for one cat, compared with approximately eight days for the 4. Actual emptying frequency varies.
Does Litter-Robot 5 work with regular clumping litter?
Litter-Robot machines are designed to work with suitable clumping litter that forms firm clumps and can pass through their sifting mechanism. Not every litter type is compatible. Check Whisker’s recommendations before using non-clumping, lightweight, or unusually shaped litter.
Can five cats use one Litter-Robot 5?
Whisker advertises the Litter-Robot 5 and 5 Pro for households with up to five cats. However, household behavior matters. Some cats prefer separate litter boxes or may avoid sharing a heavily used unit. Monitor for guarding, accidents, stress, and changes in litter box habits.
Is Litter-Robot 5 Pro better at odor control?
The 5 Pro shares WasteID and the general waste-management design of the standard Litter-Robot 5. Its cameras don’t inherently improve cleaning or odor control. Both newer models offer WasteID-based cleaning adjustments that aren’t available on the Litter-Robot 4.
Is Litter-Robot 4 still worth buying in 2026?
Yes, especially if it’s discounted. It provides the essential automatic cleaning and weight-monitoring functions at a lower starting price. The newer models offer worthwhile improvements, but the Litter-Robot 4 remains a capable option for many households.
Final Verdict: Which Litter-Robot Should You Buy?
For most people purchasing their first premium self-cleaning litter box, the Litter-Robot 5 is our recommendation.
At a starting price of $799, it costs $100 more than the Litter-Robot 4 but adds practical improvements: more interior room, increased waste capacity, updated controls, and WasteID technology.
These upgrades are more relevant to everyday ownership than simply adding another connected feature.
However, the Litter-Robot 4 remains the best value if your main goal is to stop scooping manually while spending as little as possible.
It performs the essential cleaning task, includes app connectivity, and offers cat weight tracking. If you already own one and it’s working properly, there’s little reason to replace it immediately.
The Litter-Robot 5 Pro is best for owners who genuinely want advanced monitoring.
Its cameras and optional visual identification can be useful in multi-cat households, especially when weight-based identification struggles to tell pets apart. But the Pro doesn’t provide a fundamentally better cleaning system than the standard 5, and its advanced camera features may introduce an ongoing subscription cost.
Ultimately, the best Litter-Robot isn’t necessarily the newest or most expensive.
It’s the model that makes maintaining your cats’ litter box easier without charging you extra for features you’ll rarely use.
Sources and Research Methodology
This comparison uses publicly available Whisker specifications, service terms, and independent editorial coverage. PetsPal has not represented these findings as results of its own hands-on testing.
- Whisker, Litter-Robot 4 vs 5: What Really Changed? Updated September 22, 2026.
https://www.whisker.com/blog/litter-robot-4-vs-5 - Whisker, official Litter-Robot comparison chart.
https://www.whisker.com/litter-robot-comparison-chart - Whisker, Litter-Robot 5 product specifications.
https://www.whisker.com/litter-robot-5 - Whisker, Litter-Robot 5 Pro product information and camera features.
https://www.whisker.com/litter-robot-5-pro - Whisker, Whisker+ membership plans and feature availability.
https://www.whisker.com/whisker-plus - WIRED, Which Litter-Robot Model Is Right for You? Published April 29, 2026.
https://www.wired.com/story/which-litter-robot-is-right-for-you/
Prices and subscription features should be reverified periodically because manufacturer promotions, membership terms, accessory compatibility, and software functionality may change.