Litter-Robot 4 (automatic litter box with a connected rotating globe): our review

The Litter-Robot 4 uses a proven principle: after the cat leaves the globe, an adjustable delay of a few minutes passes before the device starts a cycle. The globe then completes a full rotation. Clumped litter passes through an internal screen and drops into the sealed waste drawer at the base. The lighter, finer clean litter stays inside the globe.

The litter box is fully enclosed. This design contains odors inside the enclosure and reduces litter scattered on the floor, 2 recurring problems with conventional open litter boxes. Whisker states that the Litter-Robot 4 supports up to 4 cats, setting it apart from most competitors, which provide no guidance on this point.

The Wi-Fi connection (2,4 GHz) lets you control the device through the Whisker app on iOS and Android. The app keeps a record of visits, sends a notification when the drawer fills up and lets you start a cycle remotely. A night mode and a sleep mode are also accessible through the app.

A camera built directly into the globe provides a live view inside the litter box, a rare feature in this category. Combined with weight sensors, it enables individual monitoring of each cat, including visit frequency and weight trends. These data can help identify behavioral changes that may indicate a health issue, such as constipation or excessive urination, something owners of older cats particularly appreciate.

Whisker states that the Litter-Robot 4 supports up to 4 cats, which means emptying the drawer more frequently in households with multiple cats. The minimum required weight is 2,3 kg, roughly equivalent to a kitten aged 5 months, excluding young kittens and preventing unintended activation caused by a cat that is too light.

The enclosed globe has a fixed-size entrance. Large-breed cats such as Maine Coon and Norwegian Forest Cat, which can exceed 8 kg and 30 cm at the shoulder, may feel cramped. User feedback indicates that most average-sized domestic cats adapt easily, but owners of unusually large cats should check the entrance dimensions before buying, as these measurements are not highlighted in European marketing materials.

The Litter-Robot 4 is positioned well above its direct competitors. The Petkit Pura X offers a similar rotating globe mechanism with a connected app, but no built-in camera. The Catlink Luxury Pro also features an enclosed motorized litter box with Wi-Fi at a lower price point.

The price difference cannot be justified solely by the listed features. It also reflects the maturity of the Whisker ecosystem, the brand's reputation in this category across several product generations and after-sales support perceived as more responsive according to feedback from French-speaking users. For a household with just 1 cat or a limited budget, more affordable alternatives offer value that is hard to ignore.

The Litter-Robot 4 works only with clumping litter, including bentonite, clumping plant-based litter and clumping silica that forms solid clumps. Non-clumping crystal litter, very fine sand and non-clumping wood pellets are incompatible with the sifting mechanism. Check this before buying if you already use a specific type of litter.

The waste drawer needs emptying periodically, with an automatic app notification to let you know when. The globe can be detached and rinsed during deep cleaning. The official documentation does not mention any proprietary filter requiring replacement, a notable advantage over some competitors that charge for recurring consumables. Bags must fit the drawer, whether they are Whisker liners or compatible standard bags.

The device takes up considerable space: at approximately 64,5 cm tall with a footprint of around 60 x 62 cm, it requires a dedicated area and a nearby power outlet. It does not offer battery-powered operation. Depending on the layout, installing it in a low cupboard or under stairs may not be possible.

A Wi-Fi connection is essential for accessing advanced features such as monitoring, notifications and the camera. Without a stable network, the device operates in basic automatic mode, but health monitoring does not work. Some cats, particularly timid or older cats and those used to an open litter box, may take 2 to 4 weeks before willingly entering the enclosed globe. Allow for an adjustment period, especially for cats that have only ever used a conventional open litter box.