PETKIT Purobot Max 3

Should you buy the PETKIT Purobot Max 3?

The PETKIT Purobot Max 3 is the box for someone who wants the Litter-Robot 4's core automation at $300 less. It has a large, low entrance that suits senior cats and big breeds, twelve sensors with anti-pinch protection, and a cycle quiet enough for a bedroom. Owner satisfaction is the highest in the category. The trade is a shorter track record and a younger US support network than Whisker, though PETKIT now backs it with a 2-year warranty on U.S. purchases. For a first self-cleaning box in a one- or two-cat home, this is where we would start.

Where it earns its score

• Satisfaction scores 92. The highest satisfaction mark of any robot litter box we rank, and reliability follows at 88.
• Low, wide entry. The opening is designed for older cats and large breeds that struggle with a high step-in.
• Quiet. About 35 dB during a cycle, roughly a library, so it can live near a bedroom.
• Two weeks between empties. The 7 L waste bin covers about 15 days for one cat, and the app shows the fill level.

What to know first

• Warranty is the weakest ViperScore factor. PETKIT lists a 2-year warranty on U.S. purchases made since January 2025, but its US parts and support network is younger than Whisker's, which is what holds this factor back.
• Clumping litter only. Most clumping litters work; crystals and pellets do not.
• Newer brand in the US. Long-term parts and support are less established than Whisker's.
• Enclosed design. If your cat refuses hooded boxes, the open-top Neakasa M1 is the alternative.

Questions buyers ask