PetSafe ScoopFree OpenSky vs Popur S7 Split Litter System
Only the PetSafe ScoopFree OpenSky publishes a minimum detection weight (3 lb); Popur does not for the Popur S7 Split Litter System. With two cats the Popur S7 Split Litter System's 11-litre drawer lasts about 7 days to the PetSafe ScoopFree OpenSky's 6. Every other published figure for both is in the table, with the rows where they differ tinted.
PetSafe
PetSafe ScoopFree OpenSky
~$550
PetSafe's open-top design has no hood and no globe, so the cat never walks into an enclosure at all.
Best for: Large or hood-shy cats in a home that uses clay clumping litter
- 1 cat
- ~12
- days
- 2 cats
- ~6
- days
- 3 cats
- ~4
- days
Popur
Popur S7 Split Litter System
~$640
Popur splits the box in two: an open 20.5-by-14.2-inch tray where the cat goes, and a separate bin beside it that the tray tips waste into.
Best for: Cats that want a flat open tray, in homes with room for a long unit
- 1 cat
- ~15
- days
- 2 cats
- ~7
- days
- 3 cats
- ~5
- days
| Specification | PetSafe ScoopFree OpenSky | Popur S7 Split Litter System |
|---|---|---|
| Approx. price | ~$550 | ~$640 |
| Type | Open-top | Open-top |
| Kitten gate | Automate from ~3 lb / ~6 months | Minimum cat size not published |
| Min. detection weight | 3 lb | not published |
| Maker's minimum age | 6 months | not published |
| Max. cat weight | 33 lb | not published |
| Big-cat fit | Rated for large breeds (to 33 lb) | No weight limit published |
| Entry step | not published | 10.6 in off the floor |
| Footprint | 20 × 18.8 in × 24 in tall | 20.5 × 29.1 in × 15.8 in tall |
| Drawer volume | 8.5 L | 11 L |
| Days between emptying | ~12 / 6 / 4 days for 1 / 2 / 3 cats | ~15 / 7 / 5 days for 1 / 2 / 3 cats |
| Maker's drawer claim | Up to 14 days, one cat | Up to 35 days, one cat |
| Cats supported | not published | Up to 16 |
| Litter system | Clumping litter | Clumping litter |
| Litters listed | clumping clay | clumping clay |
| Litters to avoid | tofu, clumping wood/pine | not published |
| Weight sensor | Yes | Yes |
| Anti-pinch protection | Not stated by the maker | Stated by the maker |
| Infrared / radar | Yes | Yes |
| Camera | No | No |
| Noise | not published | 40 dB (maker's rating) |
| Wi-Fi app | Yes | Yes |
| Running cost | No required consumable | No required consumable |
| Bags / liners | PetSafe OpenSky waste bin liners | Elastic-band trash bags |
| Warranty | 1 year | 1 year |
| First listed | 2025 | 2026 |
PetSafe ScoopFree OpenSky: what it gives up
- At about $550, the priciest PetSafe
- Pine and tofu pellets may not work, per the user guide
- The two-week figure assumes one cat; PetSafe says 1–2 emptyings a week for two
- Open sides give scattered litter nowhere to land but the floor
Popur S7 Split Litter System: what it gives up
- The 35-day one-cat claim is far beyond what 11 litres can hold
- At 29 inches long it needs a big spot
- Popur gives no cat weight range
- About $640 with a one-year standard warranty
Full pages: PetSafe ScoopFree OpenSky · Popur S7 Split Litter System