Litter-Robot 4 vs PETKIT PuraMax 2
The premium category leader against the value challenger. Both self-clean and track usage; the gap is polish, tracking depth, and price.
The Lab's Verdict
Best overall
Litter-Robot 4
The class of the category. Quiet, accurate sifting, real odor control, and genuinely useful weight and health tracking per cat. Expensive, and worth it for most multi-cat homes.
93
Lab ScoreSide by side
| Product | Lab Score | Best for | Type | Tracking | Noise | Safety | Wifi | Buy |
|---|---|---|---|---|---|---|---|---|
| Litter-Robot 4 Whisker | 93 | Best overall | Automatic self-cleaning | Per-cat weight and health | Low | — | — | Whisker |
| PETKIT PuraMax 2 PETKIT | 88 | Best value | Automatic self-cleaning | — | — | Multi-sensor | 2.4G | Amazon |
The verdict
The Litter-Robot 4 is quieter, tracks each cat's health better, and has stronger support, so it wins overall. The PuraMax 2 gets you most of the way for meaningfully less money.
See all the best smart litter boxes →
Modern Pet Lab is reader-supported. We may earn a commission from verified links, at no extra cost to you. As an Amazon Associate we earn from qualifying purchases.