PETKIT Purobot Max Pro 2 vs Whisker Litter-Robot 4
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the PETKIT Purobot Max Pro 2 costs $500 and the Whisker Litter-Robot 4 costs $699, so the PETKIT Purobot Max Pro 2 is $199 cheaper. Pick the PETKIT Purobot Max Pro 2 for camera monitoring on a smaller budget. Pick the Whisker Litter-Robot 4 for one to four average size cats. The PETKIT Purobot Max Pro 2 wins 4 of 4 points we can measure.
Who wins, point by point
The PETKIT Purobot Max Pro 2 wins 4 of 4 points we can measure. Built from today's prices, the specs and independent tests for these two robots.
| Purobot Max Pro 2 | Litter-Robot 4 | Winner | |
|---|---|---|---|
| Price today | $500 | $699 | Purobot Max Pro 2 |
| 3 year cost | $643 | $1,035 | Purobot Max Pro 2 |
| Warranty | 2 years | 1 year | Purobot Max Pro 2 |
| Cats supported | 15 | 4 | Purobot Max Pro 2 |
- You want to spend less (saves $199)
- You care most about warranty (2 years vs 1 year)
- You care most about cats supported (15 vs 4)
- Best for camera monitoring on a smaller budget
- Best for one to four average size cats
- Cat weight
- 3.3 to 22 lb
- Max cats
- Camera IDs up to 15
- Litter
- Clay
- Waste drawer
- 8 L sealed drawer
Camera equipped PETKIT box that recognizes up to 15 cats
Full PETKIT Purobot Max Pro 2 review, pros and cons →- Cat weight
- 3 to 25 lb
- Max cats
- Up to 4
- Litter
- Clumping clay
- Waste drawer
- Sealed
Proven Litter-Robot with laser sensing, now Whisker's value pick
Full Whisker Litter-Robot 4 review, pros and cons →Side by side
| PETKIT Purobot Max Pro 2 | Whisker Litter-Robot 4 | |
|---|---|---|
| Price | $500 | $699 |
| 3 year cost | $643 | $1,035 |
| Our score | Not scored yet | Not scored yet |
| Rank in Litter box | #20 | #23 |
| Status | on sale | on sale |
| Warranty | 2 years (shown on PETKIT product page badge) | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 3.3 to 22 lb | 3 to 25 lb (kittens under 3 lb need semi automatic mode) |
| Max cats | Camera recognizes up to 15 cats | Up to 4 |
| Waste drawer | 8 L sealed side drawer, up to 17 days for one cat (maker claim via TechnoMeow) | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) |
| Sensors | 12 sensors including proximity and weight, anti pinch | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system |
| App | PETKIT app, 2.4 and 5 GHz WiFi; 1080p 210 degree AI camera | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional |
| Litter type | Clumping clay, tofu and mixed; two sifters included | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended |
| Size | 25.86 x 21.18 x 23.74 in, 24.25 lb, 10.5 x 10.7 in entrance | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty |
| Noise | 35 dB (maker claim) | No dB rating published; QuietSift motor |
| Best for | camera monitoring on a smaller budget | one to four average size cats |
| Skip if | you have a very large cat | your cat is over 25 lb |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
PETKIT Purobot Max Pro 2
- TechnoMeow: Camera helped monitor a senior cat with a vestibular condition; odor control excellent; sensors unreliable on carpet so manual scoop mode was used. Source
Whisker Litter-Robot 4
- Cats.com: Runner Up in the October 2026 roundup; reliable and well built, but the smaller litter bed may not suit large cats. Source
- The Irish Times: Quiet, no smells and a clean tray in a home test; sensors stopped the drum when a cat entered; app cat ID was less accurate for cats of similar size. Source
Questions buyers ask
Which is better, the PETKIT Purobot Max Pro 2 or the Whisker Litter-Robot 4?
Pick the PETKIT Purobot Max Pro 2 for camera monitoring on a smaller budget. Pick the Whisker Litter-Robot 4 for one to four average size cats.
Which is cheaper?
The PETKIT Purobot Max Pro 2 at $500, versus $699 for the Whisker Litter-Robot 4, checked Nov 4, 2026. Over 3 years with running costs: $643 vs $1,035.
What is the difference between the Purobot Max Pro 2 and the Litter-Robot 4?
Cat weight range: 3.3 to 22 lb on the Purobot Max Pro 2, 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4. Max cats: Camera recognizes up to 15 cats on the Purobot Max Pro 2, Up to 4 on the Litter-Robot 4. Waste drawer: 8 L sealed side drawer, up to 17 days for one cat (maker claim via TechnoMeow) on the Purobot Max Pro 2, Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4.
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