(Image credit: Oneisall)
There's a special kind of dread that comes with cat ownership, and it isn't the 3 a.m. zoomies or the inexplicable need to sit exactly on your laptop keyboard. It's the litter box. So when the Oneisall Ease S1, a CES Innovation Award 2026 winner earlier this year, landed on my doorstep, I'll admit I was skeptical.We've reached a point where everything from toasters to toothbrushes claims to be "smart," and a litter box felt like it might be a solution looking for a problem. A few weeks in, I've changed my tune.The Ease S1 sits in the ever-increasing robot pet tech space, but at $299 normally (and currently down to $194 on Amazon, and $229 directly from their website), it's a fraction of the price of premium rivals like the Litter-Robot.Setup and first impressions
(Image credit: Tom's Guide)Unboxing the Ease S1 was a massive relief because it completely skips the worst part of modern gadgets: there is no app to configure, no subscription to pay for, and no fuss. You just set up the open-top tray, and it automatically handles the sifting five minutes after your cat hops out.Best of all, it deposits everything into a bottom drawer that holds up to 14 days of waste, give or take, so you can forget about it for a fortnight.Setup was genuinely painless. It arrives with a clear installation guide, snaps together without tools, and includes everything you need: a litter mat, full-cover pad, power adapter, and a stack of 80 liners.My only gripe, and it's a small one, is that mine didn't come with a UK plug, so I had to dig out an adapter. Worth knowing if you're ordering from outside the US, though it may just be an unlucky unit.Get instant access to breaking news, the hottest reviews, great deals and helpful tips.The tech in practice (and two very opinionated cats)For me, the standout feature has to be the tilt mechanism. Rather than the enclosed, rotating-dome design used by other smart litter boxes, the Ease S1 moves waste toward the center of the tray as it tips, what Oneisall calls its "5-second rinse, zero dead-angle residue" tech.In practice, this means you don't get the gunky build-up that dome-style boxes are prone to, where waste smears into corners and lingers. Cleaning the stainless-steel components is quick, too: in both removal and rinsing, of course it might need a more thorough clean depending on the type of movement.Initially safety was my biggest concern — how would my cats fare with a self-cleaning machine? It's well covered, though, with a sensor array of motion, weight, and radar detection that pauses the cycle instantly if your cat so much as thinks about wandering back in. So it didn't take long for that worry to disappear entirely.
