PetSafe ScoopFree Crystal Plus vs PETKIT Purobot Crystal Duo
Only the PETKIT Purobot Crystal Duo publishes a minimum detection weight (3.3 lb); PetSafe does not for the PetSafe ScoopFree Crystal Plus. The PETKIT Purobot Crystal Duo lists for about $40 less on its maker's store. Every other published figure for both is in the table, with the rows where they differ tinted.
PetSafe
PetSafe ScoopFree Crystal Plus
~$200
The current open-tray ScoopFree adds a light that tells you when the crystal tray is spent.
Best for: A single cat in a small home where no drawer ever gets emptied
No drawer: the disposable tray is the unit you replace. The maker rates a tray for up to 30 days with one cat.
PETKIT
PETKIT Purobot Crystal Duo
~$160
This is PETKIT's answer to the ScoopFree: an open crystal tray, but with a camera that watches urination patterns and a 7-inch entry sill.
Best for: Single-cat owners who want a camera on a crystal-tray box
No drawer: the disposable tray is the unit you replace. The maker rates a tray for up to 30 days with one cat.
| Specification | PetSafe ScoopFree Crystal Plus | PETKIT Purobot Crystal Duo |
|---|---|---|
| Approx. price | ~$200 | ~$160 |
| Type | Crystal tray | Crystal tray |
| Kitten gate | Automate from 6 months (no weight published) | Automate from ~3.3 lb / ~6 months |
| Min. detection weight | not published | 3.3 lb |
| Maker's minimum age | 6 months | 6 months |
| Big-cat fit | No weight limit published | No weight limit published |
| Entry step | not published | 7.08 in off the floor |
| Footprint | 20.4 × 28.2 in × 6.6 in tall | 32.2 × 19.96 in × 13.14 in tall |
| Tray life | Up to 30 days, one cat | Up to 30 days, one cat |
| Litter system | Disposable crystal tray | Disposable crystal tray |
| Litters listed | silica crystal | silica crystal |
| Litters to avoid | clumping clay, non-clumping | clumping clay, tofu, mixed, non-clumping |
| Weight sensor | No | Not published |
| Anti-pinch protection | Not stated by the maker | Not stated by the maker |
| Infrared / radar | Not published | Not published |
| Camera | No | Yes |
| Wi-Fi app | No | Yes |
| Running cost | ~$23/month for one cat, at the longest life the maker states | ~$20/month for one cat, at the longest life the maker states |
| Required consumable | ScoopFree disposable crystal litter tray (or PetSafe's reusable tray refilled with its crystal litter) | PETKIT Crystal Litter Set (crystal litter and disposable tray) |
| Bags / liners | None — the tray is lidded and thrown away | None — the tray is thrown away |
| Warranty | 1 year | 2 years |
| First listed | 2024 | 2025 |
PetSafe ScoopFree Crystal Plus: what it gives up
- Needs a PetSafe tray roughly every month per cat, about $23 each
- Tray life halves with a second cat and drops to a week or so with three
- Ordinary clumping clay cannot be used
- PetSafe publishes no cat-weight limits
- No app
PETKIT Purobot Crystal Duo: what it gives up
- Only PETKIT's own crystal sets fit
- Monthly set cost exceeds the purchase price within a year
- PETKIT states no maximum weight, only that large breeds are suitable
- Designed around one cat; no individual cat recognition
Full pages: PetSafe ScoopFree Crystal Plus · PETKIT Purobot Crystal Duo