PetSafe ScoopFree SmartSpin vs PETKIT Purobot Max 3
The PetSafe ScoopFree SmartSpin detects lighter cats: 2.5 lb against 3.3 lb for the PETKIT Purobot Max 3, which matters most in a home with a kitten on the way. With two cats the PETKIT Purobot Max 3's 7-litre drawer lasts about 5 days to the PetSafe ScoopFree SmartSpin's 4. For a large cat, the PetSafe ScoopFree SmartSpin is rated to 25 lb and the PETKIT Purobot Max 3 to 22. Every other published figure for both is in the table, with the rows where they differ tinted.
PetSafe
PetSafe ScoopFree SmartSpin
~$400
Two PetSafe documents disagree about this drum.
Best for: A single cat whose owner wants a drum without Litter-Robot pricing
- 1 cat
- ~8
- days
- 2 cats
- ~4
- days
- 3 cats
- ~2
- days
PETKIT
PETKIT Purobot Max 3
~$400
PETKIT's third-generation drum, and the model its US store now redirects to from the old PuraMax 2 page.
Best for: One or two cats under 22 lb, especially older cats that struggle with a high step
- 1 cat
- ~10
- days
- 2 cats
- ~5
- days
- 3 cats
- ~3
- days
| Specification | PetSafe ScoopFree SmartSpin | PETKIT Purobot Max 3 |
|---|---|---|
| Approx. price | ~$400 | ~$400 |
| Type | Rotating drum | Rotating drum |
| Kitten gate | Automate from ~2.5 lb / ~6 months | Automate from ~3.3 lb / ~6 months |
| Min. detection weight | 2.5 lb | 3.3 lb |
| Maker's minimum age | 6 months | 6 months |
| Max. cat weight | 25 lb | 22 lb |
| Big-cat fit | Rated for large breeds (to 25 lb) | Rated to 22 lb — short of the heaviest large breeds |
| Entry opening | not published | 10.51 × 10.74 in |
| Entry step | 12 in off the floor | 8.03 in off the floor |
| Footprint | not published | 24.4 × 21.2 in × 21.7 in tall |
| Drawer volume | 6 L | 7 L |
| Days between emptying | ~8 / 4 / 2 days for 1 / 2 / 3 cats | ~10 / 5 / 3 days for 1 / 2 / 3 cats |
| Maker's drawer claim | Up to 14 days, one cat | Up to 15 days, one cat |
| Litter system | Clumping litter | Clumping litter |
| Litters listed | clumping clay | clumping clay, tofu, mixed |
| Litters to avoid | tofu | non-clumping |
| Weight sensor | Yes | Yes |
| Anti-pinch protection | Not stated by the maker | Stated by the maker |
| Infrared / radar | Yes | Yes |
| Camera | No | No |
| Wi-Fi app | Yes | Yes |
| Running cost | No required consumable | No required consumable |
| Bags / liners | PetSafe waste bin liners | PETKIT automatic litter box trash bags ($29.99 for 5 rolls) |
| Warranty | 1 year | 2 years |
| First listed | 2024 | 2026 |
PetSafe ScoopFree SmartSpin: what it gives up
- The guide's once-a-week emptying estimate is half the product page's two weeks
- PetSafe publishes no external dimensions for it
- Tofu and other large pellets may not work
- 25 lb ceiling is below the open-top models
PETKIT Purobot Max 3: what it gives up
- Two conflicting noise figures on the maker's own page
- 22 lb ceiling
- A 7-litre bin is a litre smaller than the Max Pro 2's
- Joins 2.4 GHz Wi-Fi only
Full pages: PetSafe ScoopFree SmartSpin · PETKIT Purobot Max 3