Purobot Max 3 vs ScoopFree Crystal Pro Legacy
One requires the maker's own litter, the other takes standard litter
Petkit Purobot Max 3
Buy now$399.99
Currently listed price on petkit.com; the page shows a higher regular price.
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PetSafe ScoopFree Crystal Pro Legacy
Buy now$129.99
List price on petsafe.com, shown as a new lower price.
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Where the published data differs
Every line below is computed from the two manufacturers’ own figures. Attributes neither brand publishes are omitted.
- ScoopFree Crystal Pro Legacy lists at $129.99, $270 below Purobot Max 3 at $399.99.
- Proprietary litter required: published for ScoopFree Crystal Pro Legacy, not for Purobot Max 3.
- App control: published for Purobot Max 3, not for ScoopFree Crystal Pro Legacy.
- Proprietary waste bags required: published for Purobot Max 3, not for ScoopFree Crystal Pro Legacy.
- Litter type required: Purobot Max 3 — Clumping clay, tofu, corn or bentonite litters; ScoopFree Crystal Pro Legacy — ScoopFree Crystal Litter disposable tray.
- Cleaning cycle trigger: Purobot Max 3 — Automatic after the cat exits, with app scheduling; ScoopFree Crystal Pro Legacy — Timed rake cycle after the cat exits.
- Footprint: Purobot Max 3 — 24.4 x 21.2 x 21.7 in; ScoopFree Crystal Pro Legacy — 27.6 x 19.1 x 6.2 in.
- Power source: Purobot Max 3 — AC adapter, 12V/2A; ScoopFree Crystal Pro Legacy — AC adapter.
Full specification comparison
| Attribute | Purobot Max 3 | ScoopFree Crystal Pro Legacy |
|---|---|---|
| Multi-cat suitable | Yes | Yes |
| Minimum cat weight | 3.3 lbs | Not published |
| Maximum cat weight | 22 lbs | Not published |
| Waste drawer capacity | 7 L | Not published |
| Litter type required | Clumping clay, tofu, corn or bentonite litters | ScoopFree Crystal Litter disposable tray |
| Proprietary litter required | No | Yes |
| Proprietary waste bags required | Yes | No |
| Subscription required | No | No |
| Cleaning cycle trigger | Automatic after the cat exits, with app scheduling | Timed rake cycle after the cat exits |
| Adjustable cycle delay | Yes | Not published |
| App control | Yes | No |
| Weight sensing | Yes | Not published |
| Health monitoring | Yes | Not published |
| Odor control method | Four-part OdorVoid system with sealed waste bin | Not published |
| Entry height | 8.03 in | Not published |
| Interior dimensions | Not published by either | Not published by either |
| Footprint | 24.4 x 21.2 x 21.7 in | 27.6 x 19.1 x 6.2 in |
| Operating noise | 35 dB | Not published |
| Power source | AC adapter, 12V/2A | AC adapter |
| Battery backup | No | Not published |
| Warranty | 24 months | Not published |