PetKit Pura Max 2

The PetKit Pura Max 2 closes the gap on the Litter-Robot 4 substantially — for ~$449 less. Its 8-layer safety sensor array is the most comprehensive on the market at this price: infrared barriers, a weight sensor, a door sensor, and radar all cross-reference before any cycle begins. The EvoSystem odor control combines an activated carbon layer with a TurboPump spray deodorizer that fires after each cleaning cycle. The 76L total capacity is actually larger than the Litter-Robot 4, making it a better fit for multi-cat households. Where it falls short is app depth — PETKIT's health tracking is competent but doesn't match Whisker's visit duration and weight-logging granularity.

True Long-Term Cost: $299.99 device + standard clumping litter + optional PETKIT Care plan. No hard subscription requirement. Strong value at this price point.