# Whisker Litter-Robot EVO review

Compact, lower priced Litter-Robot for one or two cats

- Our score: not scored yet
- Price: $599 (checked Oct 26, 2026)
- Status: on sale
- Best for: one or two average size cats in a small space
- Skip if: you have a cat over 19 lb or three or more cats
- HTML version: https://robotsforthat.com/robot/whisker-litter-robot-evo/

## Verdict

The EVO is the cheapest way into a Litter-Robot and fits smaller rooms than the Litter-Robot 4 or 5. It is rated for only two cats up to 19 lb, so big cats and busy multi cat homes should look at the larger models. It needs a flat, hard floor to avoid position errors.

## Pros

- Lowest priced current Litter-Robot
- Arrives almost fully assembled
- Sealed, carbon filtered waste drawer
- Free app tracks visits and cat weights

## Cons

- Rated for only 2 cats, 3 to 19 lb
- Clumping clay litter only
- No nightlight or entry motion sensor
- Mat edges can trigger position fault errors

## Specs

- cat weight range: 3 to 19 lb
- max cats: Up to 2 cats (maker)
- waste drawer: Sealed, carbon filtered drawer, up to 7 days for one cat (maker)
- sensors: Weight sensors and SafeCat anti obstruction system; no entry motion sensors (Vetstreet)
- app: Whisker app (iOS and Android), 2.4 GHz WiFi only; Whisker+ membership optional
- litter type: Clay based clumping litter; crystal, plant, paper and pellet litters not recommended
- size: 20.6 x 24.3 in footprint, 27.6 in tall, 14.85 in entry, 21.5 lb empty
- noise: Marketed as nearly silent (QuietSift); no dB figure given

## Safety

- recalls: None found as of 2026-10-26 (CPSC search)
- fcc: Not checked
- company status: Active
- warranty: 1 year, 3 years with WhiskerCare ($99); 90 day in home trial

## Questions buyers ask

### How is the EVO different from the Litter-Robot 4?

It is smaller and cheaper, but rated for two cats from 3 to 19 lb. Whisker's FAQ says litter level and waste level sensing are Litter-Robot 4 features.

### Does the app need a subscription?

No. Cat ID by weight, daily visits and remote control are free. Whisker+ is an optional upgrade for extra history and insights.

## Sources

1. [Whisker: Litter-Robot EVO](https://www.whisker.com/litter-robot-evo)
2. [Vetstreet: Litter-Robot EVO review](https://www.vetstreet.com/pet-product-reviews/litter-robot)
3. [TechnoMEOW: Litter-Robot EVO review](https://technomeow.com/litter-robot-evo-review/)
4. [PetSmart: Litter-Robot EVO](https://www.petsmart.com/cat/litter-and-waste-disposal/litter-boxes/litter-robot-evo-automatic-self-cleaning-cat-litter-box-by-whisker-app-enabled-monitoring-5377620.html)