Side-by-side comparison based on expert reviews and community consensus.
Litter-Robot 4
Best OverallPetkit Purobot Max Pro 2
Best PremiumPrice
$699
$441-$560
Summary
The gold standard in automatic litter disposal — spacious, repairable, and backed by the only manufacturer offering replacement parts for DIY fixes. Whisker's app is genuinely excellent, tracking weight and bathroom habits with real accuracy.
WIRED's current top pick thanks to a built-in 1080p AI camera with 210-degree view, multi-cat face recognition, and a self-sealing waste bag that holds up to 17 days of waste. The 43% larger opening vs. its predecessor makes it viable for big cats.
Pros
- Largest entry opening (15.8x15.8 inches) among tested models — works for cats up to any size
- Whisker app is intuitive, tracks weight daily, monitors litter and waste levels with alerts
- Only manufacturer offering extended warranty and DIY replacement parts
- Compatible with optional LitterHopper auto-refill attachment
- Carbon-filtered waste drawer contains odor until you open it
- Built-in 1080p camera with night vision, 210-degree view, and AI multi-cat face recognition
- Self-sealing waste bag stores up to 17 days of waste for one cat
- 43% larger opening than previous model — works for cats up to 22 lbs
- Dual odor eliminator cartridges plus sealed waste bin for near-zero smell
- Works on both 2.4GHz and 5GHz Wi-Fi networks
Cons
- Expensive at $699
- Sensors can develop 'ghost cat' glitches over time requiring firmware fixes
- Front-facing hole is harder to refill than Petkit's rotating design
- LitterHopper attachment has reliability issues — one WIRED reviewer's stopped working after 7 months
- App is overcrowded with ads for other Petkit products
- Multi-cat face recognition degrades significantly after free Care+ subscription ends
- Camera is not movable or repositionable
- Proprietary waste bags and refill rings required ($35 for 3)
Our take
If you're going to spend serious money on a litter disposal system, this is the one. It's been field-tested longer than any competitor, and the community consensus is overwhelming — it just works.
If you want the most tech-forward litter disposal system on the market right now, this beats the Litter-Robot 4 on features — the camera and health monitoring are genuinely useful, not just gimmicks.
Buy
