Choosing an automatic litter box is a big decision. The UBPet Pro and the Litter-Robot 4 both promise hands-free cleaning, app connectivity, and a cleaner home. But they differ in size, features, price, and design. A side-by-side look at verified specs helps you decide which one fits your household, your cat, and your budget.
What You Actually Get: UBPet Pro vs. Litter-Robot 4
Both machines automate the scooping process using a rotating mechanism to sift waste from clean litter. The comparison table below covers the key specifications sourced from each manufacturer’s published product information.
FeatureUBPet ProLitter-Robot 4External Dimensions20″ W x 21″ D x 22″ H22″ W x 27″ D x 29.5″ HCat Weight RangeUp to 15 lbs (per manufacturer)3 to 25 lbs (no hard weight limit per manufacturer)Multi-Cat SupportUp to 6 cats (tracked by weight)Up to 4 catsAppUPET app (no subscription required)Whisker app (optional Whisker+ subscription)Built-In CameraYes, internal live feedNo (camera mount accessory available)Cleaning MechanismRotating drum, one-piece designRotating globe, sifting technologyEntry DesignOpen entry, stays open during cycleEnclosed globe with a wide openingWaste Bin Capacity2-gallon bagLarge sealed drawer (up to 8 days for 1 cat)Noise LevelAs low as 40 dB (per manufacturer)QuietSift technology (exact dB not published)Litter CompatibilityMost clumping litterMost clumping or scoopable litterSafety FeaturesMotion and weight sensors, anti-pinch one-piece drumSafeCat system with OmniSense detection, laser, and weight sensorsTrial Period60-day Happy Cat Guarantee90-day in-home trialWarrantySee manufacturer for details1 year (extendable to 3 years)
The UBPet Pro offers a more compact build, a built-in camera, and a subscription-free app at nearly half the price. The Litter-Robot 4 brings a larger interior, a broader weight range, and an extended warranty. Both automate the one chore every cat parent dreads, just in different ways.
If you live in an apartment or a home where space matters, the size difference between these two units is worth a closer look.
UBPet Pro
The UBPet Pro measures 20″ W x 21″ D x 22″ H. A compact profile that tucks neatly beside furniture or inside a litter box cabinet without demanding attention or floor space.
Litter-Robot 4
The Litter-Robot 4 is noticeably larger at 22″ W x 27″ D x 29.5″ H, which may require more planning around placement in tighter spaces.
Cat Size and Weight Capacity
Most automatic litter boxes are built with a specific cat size in mind. Knowing where your cat falls helps you pick the right fit.
UBPet Pro
Recommended for cats up to 15 lbs and of average size and length. Most domestic cats, including American Shorthairs, Siamese, and Bengals, fall comfortably within that range.
Litter-Robot 4
Designed for cats 3 to 25 lbs with no hard weight limit per the manufacturer, giving it an edge for larger breeds like Maine Coons and Ragdolls.
App Features and Health Monitoring
Both units connect to smartphone apps, but the experience and cost structure differ.
UBPet Pro
The UBPet Pro connects through the UPET app, which does not require a subscription. You get usage tracking for up to 6 cats identified by weight, real-time notifications, and a built-in camera with a live feed you can check at any time. Being able to visually check on your cat from anywhere, without buying a separate camera, is a standout convenience that many cat parents appreciate.
Litter-Robot 4
The Litter-Robot 4 uses the Whisker app with a free tier for basic data and a paid Whisker+ subscription for historical trends and daily recaps. The Litter-Robot 4 does not include a built-in camera, though a camera mount accessory is available for attaching a webcam of your choice.
Safety Features
Cat safety is a top concern with any automatic litter box, and both manufacturers have taken different approaches to protect your cat during the cleaning cycle.
UBPet Pro
The UBPet Pro uses motion and weight sensors that pause all operations the moment a cat is detected. What makes the design reassuring is that the entry stays completely open during the entire cleaning cycle. The drum and waste bin rotate as a single piece, an anti-pinch design per the manufacturer. Even if a cat enters mid-cycle, they can simply hop out. No doors close. No parts trap.
Litter-Robot 4
The Litter-Robot 4 uses its SafeCat system with OmniSense detection, combining laser and weight sensors. Cleaning does not begin until after the cat leaves, with an adjustable delay of up to 30 minutes. QuietSift technology keeps noise low during the cycle.
Odor Control
Both machines reduce odor through prompt waste removal, and both perform best when set to clean after every use.
UBPet Pro
The UBPet Pro encloses waste in a lidded bin and pairs with an optional odor eliminator accessory for added freshness. Housing the unit inside an enclosed cabinet with ventilation adds another layer of containment.
Litter-Robot 4
The Litter-Robot 4 seals waste in a drawer with a built-in carbon filter and an optional OdorTrap system. A cabinet enclosure works equally well here for additional odor management.
Price and Value
Upfront cost is only part of the picture. The day-to-day running costs and included perks shape the real value over time.
UBPet Pro
The UBPet Pro retails at $399.99, nearly half the cost of the Litter-Robot 4. Waste disposal uses standard 2-gallon trash bags you likely already have at home. The UPET app is completely free with full features and no subscription required. The unit includes a 60-day Happy Cat Guarantee.
Litter-Robot 4
The Litter-Robot 4 retails at $699 and uses proprietary waste drawer liners. The Whisker app offers a free basic tier, but charges for the Whisker+ subscription to unlock advanced insights. On the other hand, the Litter-Robot 4 offers a longer 90-day in-home trial and a warranty that extends up to 3 years.
Which One Fits Your Household
For most cat parents with average-sized cats, the UBPet Pro delivers a lot of value in a compact package. A built-in camera, subscription-free app, 6-cat tracking, open-entry safety, and a smaller footprint make it a strong choice for everyday households. The Litter-Robot 4 earns its place for homes with larger cats who need a roomier interior. Pairing either model with a litter box cabinet and consistent maintenance habits creates the freshest experience for you and your cat.
Shop the Collection
A cleaner litter box means a happier cat, and at $399.99 with a built-in camera, subscription-free app, and compact design, the UBPet Pro makes that upgrade easy to say yes to. Pair it with a cabinet that hides the tech and keeps your home looking exactly the way you want it.
See the UBPet Pro Self-Cleaning Litter Box up close, or browse the full collection of modern cat furniture to find the setup that fits your space, your style, and your cat.
Frequently Asked Questions
Q. What is the main difference between the UBPet Pro and the Litter-Robot 4?
The UBPet Pro is more compact, includes a built-in camera with live feed, and tracks up to 6 cats without a subscription. The Litter-Robot 4 is larger, accommodates cats up to 25 lbs, and offers a 90-day in-home trial.
Q. Does the UBPet Pro work for large cats?
The manufacturer recommends the UBPet Pro for cats up to 15 lbs and of average size and length. Larger or heavier cats may find the interior too small for comfortable use.
Q. Does the Litter-Robot 4 have a camera?
The Litter-Robot 4 does not include a built-in camera. A camera mount accessory is available for attaching a webcam of your choice.
Q. Can I put either litter box inside a cabinet?
Yes. The Refined Self-Cleaning Litter Box Cabinet is designed to fit both the UBPet Pro and Litter-Robot 4, along with several other popular automatic litter box models.
Q. Do both litter boxes require a subscription?
The UBPet Pro app is completely free with full features. The Litter-Robot 4 offers a free tier with basic data and an optional paid Whisker+ subscription for advanced insights.
Q. Which automatic litter box is quieter?
The UBPet Pro lists noise levels as low as 40 dB according to published specs. The Litter-Robot 4 uses QuietSift technology but does not publish a specific decibel rating. Both are designed for quiet operation.
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