UBPet C31 review

An open rake rather than a rotating globe

The UBPet C31 is the open-top member of this family. It leaves the litter bed visible and moves a dual metal rake across it, carrying waste toward the front collection area. That is a meaningful contrast with the C41 and C41 Pro: those models rotate a semi-open chamber to sift litter. If your cat avoids enclosed entrances, the C31's low, uncovered layout may be easier to approach than a globe, but an open pan does not contain every kicked grain or odor as well as a closed waste drawer.

UBPet describes an eight-millimeter gap between its rake teeth and a three-motor cleaning arrangement. Those are manufacturer specifications, not a measurement of how thoroughly the machine will clean every clump or litter texture. A clump that sticks, a long litter strand, or material outside the recommended particle range can change what the rake carries. The page recommends bentonite, mineral and cassava litters, rejects long strip-shaped litter, and gives a maximum particle dimension of twelve millimeters. It also says to keep fill below the marked line. For a hard litter requirement, choose a listed type and follow the particle guidance rather than treating “works with most litter” as universal compatibility.

Cat limits need both the page and its FAQ

The C31 product page advertises cats from 2.2 to 24 pounds and says the app can store individual information for up to five cats. That profile count is not a manufacturer household-capacity rating, and it does not tell you how often the bin will fill. The same page's FAQ says to switch to manual mode for cats younger than six months, under 3.3 pounds, or with limited mobility. For automatic use, follow that more specific caution: both a young age and a low weight can matter. Do not infer a safe minimum from the product-page headline alone.

The manufacturer advertises app reporting for visit frequency, duration and weight changes. Such records may help you notice a change in routine, but they are not a diagnosis or a substitute for observing your cat. The page gives a single-cat litter refresh recommendation of roughly two to three weeks based on its fill marks; actual scooping and litter replacement still depend on use. Its bin-full reminder is tied to a chosen number of visits, so set that count conservatively and check the container rather than assuming an electronic reminder equals a volume sensor.

Check the exact package, space and support evidence

The US listing offers a base C31 and selectable packages that add a litter guard, waste bags or deodorizing blocks. Those are package additions to one machine, not separate cleaning mechanisms. The page's standard contents list one box, adapter, manual, deodorizing blocks and a roll of waste liners; verify the exact option and included consumables in the offer you are considering, especially if a bundle title names an accessory. The guard may help manage scattering but does not turn the C31 into a hooded or enclosed box.

Published body measurements are 28 by 19 by 7.6 inches, but the page does not identify the axes. Do not assume which number is width or depth when a tight alcove is a hard constraint. UBPet lists a net weight of 11 pounds including the adapter. Leave room to lift the waste bin and service the rake, and place the base on a firm, level floor rather than a mat beneath the unit. The accessible product page documents a US listing, but it does not resolve every fit question a narrow doorway or limited-mobility cat may raise.

One source caveat matters for owners who need written maintenance instructions. UBPet's support center labels a PDF as the C31 use manual, but the saved guide itself names model UCAT C30 and shows a different FCC identifier. I do not treat that document as an exact C31 manual or borrow its technical instructions. The current C31 product page and its FAQ support the facts above; an exact C31 manual and its detailed cleaning directions remain unverified. If you need model-specific support before purchase, ask UBPet for the C31-labeled guide rather than relying on a near-name match.

Who should shortlist the C31?

Consider it when an open entry, familiar clumping litter and app activity summaries matter more than a rotating globe or a precise multi-cat capacity guarantee. It is also the one to investigate if your cat dislikes enclosed chambers, provided your cat meets the maker's automatic-use guidance and the rake's supported litter size fits your choice. If you want a contained rotating design and a stated 6.7-liter waste bin, compare the C41. If the camera, face-based individual-cat identification and dual-band Wi-Fi are essential, compare the C41 Pro; those are not C31 features.

The C31 is not the strongest fit when a verified minimum weight, kitten age, axis-labeled footprint, app network band, waste-bin volume or exact manual is essential. Several are unknown or conditional rather than confirmed. Treat those unknowns as questions for the manufacturer, not as a pass. Also keep a conventional pan available during transition: an automatic rake only helps if the cat willingly uses the new box and its movement does not cause avoidance.