MW-SC09 Plus vs Litter-Robot EVO
Cross-brand multi-cat rivals at a similar price
Whisker Litter-Robot EVO
Buy now$599
Manufacturer starting price on whisker.com ("as low as $599"); bundles cost more.
Buy now · Manufacturer US/Canada PDP live; as low as $599 with Add to cart / InStock signals (verified 2026-09-12).
Where the published data differs
Every line below is computed from the two manufacturers’ own figures. Attributes neither brand publishes are omitted.
- Litter-Robot EVO lists at $599, $40.99 below MW-SC09 Plus at $639.99.
- Maximum cat weight: MW-SC09 Plus 30 lbs versus Litter-Robot EVO 19 lbs (58% more). Published data favours MW-SC09 Plus.
- Minimum cat weight: MW-SC09 Plus 3.3 lbs versus Litter-Robot EVO 3 lbs (10% more). Published data favours Litter-Robot EVO.
- Litter type required: MW-SC09 Plus — Clumping litter, particle length under 15 mm; Litter-Robot EVO — Clumping clay litter.
- Cleaning cycle trigger: MW-SC09 Plus — Automatic after the cat leaves, plus manual and timer modes; Litter-Robot EVO — Weight sensors start the cycle after the cat exits.
- Odor control method: MW-SC09 Plus — Odour-proof cover plus ammonia-breaking deodorising gel; Litter-Robot EVO — Sealed waste drawer with carbon filter.
- Footprint: MW-SC09 Plus — 20 x 21.5 x 20 in; Litter-Robot EVO — 20.6 x 24.3 in.
Full specification comparison
| Attribute | MW-SC09 Plus | Litter-Robot EVO |
|---|---|---|
| Multi-cat suitable | Yes | Yes |
| Minimum cat weight | 3.3 lbs | 3 lbs |
| Maximum cat weight | 30 lbs | 19 lbs |
| Waste drawer capacity | 6.7 L | Not published |
| Litter type required | Clumping litter, particle length under 15 mm | Clumping clay litter |
| Proprietary litter required | No | No |
| Proprietary waste bags required | No | No |
| Subscription required | No | No |
| Cleaning cycle trigger | Automatic after the cat leaves, plus manual and timer modes | Weight sensors start the cycle after the cat exits |
| Adjustable cycle delay | Yes | Yes |
| App control | Yes | Yes |
| Weight sensing | Yes | Yes |
| Health monitoring | Yes | Yes |
| Odor control method | Odour-proof cover plus ammonia-breaking deodorising gel | Sealed waste drawer with carbon filter |
| Entry height | 8.27 in | Not published |
| Interior dimensions | 106 L interior space | Not published |
| Footprint | 20 x 21.5 x 20 in | 20.6 x 24.3 in |
| Operating noise | 36 dB | Not published |
| Power source | Not published | 15 Volt DC / AC adapter |
| Battery backup | Not published by either | Not published by either |
| Warranty | 12 months | 12 months |