PETKIT Purobot Max Pro 2 vs PETKIT Purobot Ultra
Both makers say their sensor detects cats from 3.3 lb, so the kitten threshold does not separate them. With two cats the PETKIT Purobot Ultra's 10-litre drawer lasts about 7 days to the PETKIT Purobot Max Pro 2's 5. The PETKIT Purobot Ultra needs its maker's consumable to run; the PETKIT Purobot Max Pro 2 does not. Every other published figure for both is in the table, with the rows where they differ tinted.
PETKIT
PETKIT Purobot Max Pro 2
~$500
PETKIT's camera drum puts a 1080p, 210-degree lens beside the entry and claims it can tell up to 15 cats apart, even two of similar weight.
Best for: Multi-cat homes that need cats told apart and can live with a 22 lb ceiling
- 1 cat
- ~11
- days
- 2 cats
- ~5
- days
- 3 cats
- ~3
- days
PETKIT
PETKIT Purobot Ultra
~$800
Unlike PETKIT's other drums, the Ultra bags its own waste: each full load is heat-sealed from a refill ring, so emptying means lifting out a closed bag.
Best for: Owners who most want never to handle an open waste bag
- 1 cat
- ~14
- days
- 2 cats
- ~7
- days
- 3 cats
- ~4
- days
| Specification | PETKIT Purobot Max Pro 2 | PETKIT Purobot Ultra |
|---|---|---|
| Approx. price | ~$500 | ~$800 |
| Type | Rotating drum | Rotating drum |
| Kitten gate | Automate from ~3.3 lb / ~4 months | Automate from ~3.3 lb / ~6 months |
| Min. detection weight | 3.3 lb | 3.3 lb |
| Maker's minimum age | not published | 6 months |
| Max. cat weight | 22 lb | 22 lb |
| Big-cat fit | Rated to 22 lb — short of the heaviest large breeds | Rated to 22 lb — short of the heaviest large breeds |
| Entry opening | 10.51 × 10.74 in | 9.84 × 8.54 in |
| Entry step | 10.03 in off the floor | 10.43 in off the floor |
| Footprint | 25.86 × 21.18 in × 23.74 in tall | 20.94 × 32.2 in × 24.09 in tall |
| Drawer volume | 8 L | 10 L |
| Days between emptying | ~11 / 5 / 3 days for 1 / 2 / 3 cats | ~14 / 7 / 4 days for 1 / 2 / 3 cats |
| Maker's drawer claim | Up to 17 days, one cat | Up to 20 days, one cat |
| Litter system | Clumping litter | Clumping litter |
| Litters listed | clumping clay, tofu, mixed | clumping clay, tofu, mixed |
| Litters to avoid | non-clumping | non-clumping |
| Weight sensor | Yes | Yes |
| Anti-pinch protection | Stated by the maker | Stated by the maker |
| Infrared / radar | Yes | Yes |
| Camera | Yes | Yes |
| Noise | 35 dB (maker's rating) | not published |
| Wi-Fi app | Yes | Yes |
| Running cost | No required consumable | ~$16/month for one cat, at the longest life the maker states |
| Required consumable | not published | PETKIT refill ring for the auto-packing waste system |
| Bags / liners | PETKIT drawstring waste bags recommended; standard bags may be too thick | Proprietary heat-sealed refill ring |
| Warranty | 2 years | 2 years |
| First listed | 2025 | 2024 |
PETKIT Purobot Max Pro 2: what it gives up
- 22 lb ceiling is below the Litter-Robot 4 and 5
- PETKIT recommends its own bags, and warns some standard bags will not fit
- The 10.5 by 10.7 inch entry is much smaller than a Litter-Robot's
- Video history beyond the basics sits behind PETKIT Care+
PETKIT Purobot Ultra: what it gives up
- Refill rings are required and add roughly $15 a month for one cat
- At 32.2 inches deep it needs a long spot
- The 9.8 by 8.5 inch entry is the smallest of PETKIT's drums
- 22 lb ceiling
- About $800, near the Litter-Robot 5
Full pages: PETKIT Purobot Max Pro 2 · PETKIT Purobot Ultra