Whisker Litter-Robot 4 Self-Cleaning Litter Box

The Litter-Robot 4 from Whisker is an automatic, self-cleaning litter box. After each visit it sifts out the waste and drops it into a sealed, carbon-filtered drawer that helps keep odors down, so your cat gets a fresh bed of litter without you scooping every day.

Whisker gave this generation a wider entryway, updated sensor technology and noticeably quieter operation than earlier Litter-Robot models. Weight sensors register each visit, and the Whisker app lets you track usage, check litter and waste-drawer levels, and get real-time notifications from anywhere. It's designed for multi-cat homes with up to four cats, and it comes with a carbon filter, a step and a fence that snaps onto the rim to help keep litter inside.

The unit measures 29.5 x 27 x 22 inches and weighs 24 lbs empty, so plan floor space for it. It suits busy cat owners and multi-cat households that want less hands-on litter duty and better visibility into how the box is being used.