Brand
Whisker makes the Litter-Robot, the rotating-globe design most other drums are measured against. Every current model detects cats from 3 lb, runs on ordinary clay clumping litter and carries a one-year warranty, and none of Whisker's pages publishes a drawer volume or a decibel figure.
Ordered by price, lowest first.
Rotating drum
Best for: One or two average-size cats in an apartment
Rotating drum
Best for: Two or three average cats in a home that already uses clay clumping litter
Rotating drum
Best for: Large multi-cat homes that want visit-level tracking without a camera
Rotating drum
Best for: Multi-cat homes where telling similar-weight cats apart matters