Spec-by-spec
Head to head
Contenders from Self-Cleaning Litter Boxes, every metric lined up. The winning value in each row is outlined.
Litter-Robot 4 Self-Cleaning Litter Box with App & Multi-Cat Support #1 in Self-Cleaning Litter Boxes 
Price
Check price on Amazon →
Check price on Amazon →
Rating
★★★★★
★★★★★
Category rank
#1
#8
Cleaning Effectiveness
Fully sifts waste, leaves litter clean
Excellent; fully sifts waste, litter stays clean
Odor Control
Sealed drawer with carbon filter, excellent containment
Strong; sealed drawer + included carbon filters
App & Safety Sensors
Full app with weight tracking and anti-pinch sensors
Full-featured app; weight & anti-pinch sensors
Waste-Drawer Capacity
Large drawer, handles 2–3 cats well
Large drawer; handles 2–3 cats adequately
Ease Of Maintenance
Straightforward liner and drawer emptying
Straightforward drawer & liner changes
Noise
Moderate audible hum during cycle
Quiet operation; won't startle cats
Value
Premium pricing for category-leading performance
Premium flagship; high price justified by features
Verdict
The gold-standard self-cleaning litter box for multi-cat homes
The category-defining automatic self-cleaning litter box
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