Petkit Purobot Max Pro 2 vs Whisker Litter-Robot 4

The Purobot's built-in 1080p camera with night vision and 210-degree view is the most genuinely unique thing in this category right now. But WIRED specifically flagged that cat recognition becomes unreliable once the free Care+ subscription expires — meaning the headline feature degrades unless you keep paying $4–$12/month indefinitely. The LR4 has no camera at all natively, but it also has no subscription required to use its core health-tracking features. You're not just buying a camera with the Petkit; you're buying into an ongoing fee to keep it useful.

Automatic litter boxes are mechanical devices that will eventually break. The Litter-Robot 4 is the only product in this category where you can order individual replacement parts and fix it yourself — Whisker has built an entire ecosystem around keeping older units running. The Petkit Purobot Max Pro 2 offers no equivalent. When something breaks on the Petkit in year three, you're buying a new unit. When something breaks on the LR4, you're ordering a $30 part. At $700 upfront, the LR4's total cost of ownership over five years can actually undercut the Petkit.

The LR4's sealed waste drawer with a carbon filter is the best odor containment system in this category, and real-world users on Reddit confirm it — one user noted that with a normal litter box there's always a background smell, but the LR4's sealed drawer keeps it genuinely contained. The Petkit's self-sealing waste bag system storing up to 17 days of waste is clever on paper, but 17 days of accumulated waste in a bag is also 17 days of potential odor buildup. For anyone whose primary motivation for buying a robot litter box is smell, the LR4 wins this decisively.

The Purobot Max Pro 2 scores 82/100 in editorial consensus; the Litter-Robot 4 scores 94/100 — a 12-point gap that's enormous in a category where most products cluster between 75 and 90. The LR4 wasn't just named best by one outlet; Wirecutter, WIRED, CNET, and Good Housekeeping all independently reached the same conclusion. That kind of cross-publication agreement is rare and meaningful. The Petkit earned WIRED's top spot specifically for its camera feature — a narrower, more conditional endorsement. If the camera isn't your priority, the consensus points overwhelmingly one direction.