Litter-Robot 4.
Litter-Robot 4 by Whisker — globe sift, QuietSift cycle, carbon-filtered sealed waste drawer, fail-safe sensors. Up to 4 cats, 3–25 lb. Footprint 22 × 27 in.
The Verdict.
Gavler Meta-Score
“The default automatic box. Real sifting, a sealed drawer, and sensors that wait — that is the job. Skip it only if you need an open top, a drain, or $300 instead of $699.”
The Gavler Verdict
Where to Buy.
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Precision Engineering
Fail-Safe Sensors Before Every Cycle
Lasers, weight sensors, and anti-obstruction wait until the globe is empty. The motor is not the safety system — the sensors are.
Sealed Carbon-Filtered Drawer
Clumps drop into a tight drawer with a carbon filter. OdorTrap packs are optional; the seal is the product.
QuietSift Globe
Sifts after the cat leaves. Any clumping litter. Up to 4 cats, ~8 days between empties for one.
Technical Specifications
The Scoreboard
Editorial seed — Litter-Robot 4 is the reliability / odor / fail-safe reference (Whisker spec, 10,000+ 5-star reviews on the 4). Community scores will move with votes.
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