Cat care · manufacturer specs
This is a side-by-side of what each manufacturer publishes, not a hands-on test or ranking. Prices change: check the date shown and confirm details on the official site before buying. For a closer look at two models, read our Litter-Robot 4 vs Neakasa M1 guide.
Maker statements, including capacity and emptying estimates, are reproduced as published. Scroll horizontally to see every model.
| Specification | Whisker Litter-Robot 4 | Neakasa M1 | PETKIT PuraMax 2 | PetSafe ScoopFree Crystal Pro |
|---|---|---|---|---|
| Design | Enclosed rotating globe | Open-top rotating drum | Enclosed rotating cylinder | Open tray with rake; covered versions sold |
| Cat weight | 3–25 lb | 2.2–about 33 lb | 3.3–22 lb | Not stated by maker |
| Entry | 15.75" × 15.75" opening | 13.86" entry height | 7.87" (200 mm) entrance height | Not stated by maker |
| Dimensions | 22" W × 27" D × 29.5" H | Not stated by maker | 24.41 × 21.18 × 21.73 in (620 × 538 × 552 mm) | 27.6 × 19.1 × 6.2 in (uncovered) |
| Waste capacity | Not stated; emptying “as low as once every 8 days” | 11.23 L bin (“up to 14 days”) | 7 L bin (“up to 15 days” for one cat, maker's lab figure) | Disposable tray; one tray “up to a month” for one cat |
| Compatible litter | Clumping clay only; not plant-based, paper, pellet, or non-clumping | Clumping or scoopable; not non-clumping, paper, or pellet | Most clumping litters; pieces no longer than 12 mm | ScoopFree crystal litter trays only |
| Cats supported | Up to 4 cats per unit | Not stated by maker | Not stated by maker | Single or multi-cat households |
| Empty unit weight (lb) | 24 | 22.81 | 22 | Not stated by maker |
| Warranty | 1 year included; 3-year plan sold separately | 2-year limited | Not stated by maker | Not stated by maker |
| Recurring supplies | Clumping clay litter plus drawer linerson the official site, checked November 1, 2026 | Clumping litter plus waste-bin bagson the official site, checked November 1, 2026 | Clumping litter plus waste-bin bagson the official site, checked November 1, 2026 | Disposable crystal trays ($73.49 for a 3-pack on the official site)on the official site, checked November 1, 2026 |
| List price (USD) | Not stated by makeron the official site, checked November 1, 2026 | $549.99on the official site, checked November 1, 2026 | $599.99on the official site, checked November 1, 2026 | $129.99on the official site, checked November 1, 2026 |
| Sale / starting price (USD) | $699on the official site, checked November 1, 2026 | $379.99on the official site, checked November 1, 2026 | $399.99on the official site, checked November 1, 2026 | Not stated by makeron the official site, checked November 1, 2026 |
| Specs checked | ||||
| Source | Official specs | Official specs | Official specs | Official specs |
Values were copied from each maker's official page on the date shown. “Not stated by maker” means that page did not list the value. We will update the table as pages change. Use the official specs links to check the latest details.