The app also lets you tweak its features, including how long you want it to wait to run a cleaning cycle after your cat has left, or whether you want the automatic interior night-light to come on when it's dark out. These readings were pretty much in line with Cheese's and Chad's latest weigh-in at the vet, but you can expect to see lots of lesser readings if your cat has a habit of leaning in partway for a look. If you have multiple cats, the app won't be able to tell which one is which (though this feature seems to be in the works), but it will provide weight readings whenever one of them steps inside. The app starts by providing a rundown of recent activity in the box. Kittens of that size can still use the thing, but you'll need to turn off automatic mode and instead trigger cleaning cycles yourself - otherwise, you'll risk the thing rotating while your pet's inside.

One caveat here: The Litter-Robot 4's sensors can't detect cats that weigh less than 3 pounds. Blue lights mean the machine is ready to go, red lights mean a cat is detected and all motion is paused, and animated yellow lights shine whenever the drum is rotating. And don't worry - if your cat gets curious about all that rotating and sifting and sticks its head in to take a peek, the Litter-Robot will sense its presence and pause the cycle until kitty has moved on.Īs for the controls on the machine itself, you'll find a set of buttons on the top of the Litter-Robot for turning it on and off, manually starting a cleaning cycle, and other basic functions, along with a set of color-changing indicator lights. Finally, the drum turns counter-clockwise again to pour the clean litter perfectly back into place. Once that hole makes it to the bottom, the clumps fall through into the waste drawer below. Then, it spins back in the other direction, revealing a hole in the drum.

After your cat uses the box, the drum slowly rotates counter-clockwise, letting all the clean litter fall through the grate and leaving just the clumps behind. There's a marked space for litter at the bottom and a sifting grate on the left. The interior is lined with flexible gray rubber, and sports a pretty ingenious design. The big, strange box in the living room immediately drew Cheese's and Chad's attention, and as soon as the Litter-Robot was unboxed, Cheese hopped in and started sniffing around. If the Litter-Robot 4 detects a curious cat while the drum is rotating, the cycle will pause and wait for kitty to move on.

Whisker litter robot