# PetSnowy SNOW+ vs Whisker Litter-Robot 4

As of Nov 4, 2026, the PetSnowy SNOW+ costs $529 and the Whisker Litter-Robot 4 costs $699, so the PetSnowy SNOW+ is $170 cheaper. The PetSnowy SNOW+ has a published review score and ranks #6 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the PetSnowy SNOW+ for limiting litter tracking. Pick the Whisker Litter-Robot 4 for one to four average size cats.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/petsnowy-snow-plus-vs-whisker-litter-robot-4/

## Side by side

| | PetSnowy SNOW+ | Whisker Litter-Robot 4 |
|---|---|---|
| Price | $529 | $699 |
| 3 year cost | $529 | $1,035 |
| Our score | 7.5/10 | Not scored yet |
| Rank in Litter box | #6 | #23 |
| Status | on sale | on sale |
| Warranty | Up to 4 years per PetSnowy; 30 day free trial | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 3.3 to 20 lb (Cats.com); PetSnowy says 3.3 lb minimum for automatic mode | 3 to 25 lb (kittens under 3 lb need semi automatic mode) |
| Max cats | Up to 4 recommended | Up to 4 |
| Waste drawer | 10 L auto sealing bin, up to 14 days for one cat (maker claim) | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) |
| Sensors | Radar and weight sensors, anti pinch mechanism | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system |
| App | PetSnowy app with usage tracking and adjustable cleaning time | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional |
| Litter type | Clumping clay preferred; tofu, pine and crystal listed as working | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended |
| Size | 29.5 x 20 x 25.6 in, 8.7 x 8.7 in entry, 32.19 lb | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty |
| Noise | Peak 53 dB per Cats.com | No dB rating published; QuietSift motor |
| Best for | limiting litter tracking | one to four average size cats |
| Skip if | your cat is large or hesitant | your cat is over 25 lb |

## What reviewers found

### PetSnowy SNOW+

- Cats.com: Best Anti Tracking in the October 2026 roundup; cats were curious but did not use it, likely due to the tight entry. [Source](https://cats.com/reviews/best-self-cleaning-litter-box)
- Cats.com (4.6/5): Easy app setup and quick magnetic cleaning; peak noise 53 dB; reviewer says it is more appropriate for smaller cats. [Source](https://cats.com/petsnowy-automatic-litter-box-review)
- TechnoMeow: Comparison with Litter-Robot 4 favored SNOW+ for odor control but rated the Litter-Robot 4 higher overall; app lacks Whisker style weight insights. [Source](https://technomeow.com/petsnowy-snow-plus-vs-litter-robot-4/)

### Whisker Litter-Robot 4

- Cats.com: Runner Up in the October 2026 roundup; reliable and well built, but the smaller litter bed may not suit large cats. [Source](https://cats.com/reviews/best-self-cleaning-litter-box)
- The Irish Times: Quiet, no smells and a clean tray in a home test; sensors stopped the drum when a cat entered; app cat ID was less accurate for cats of similar size. [Source](https://www.irishtimes.com/technology/consumer-tech/review/2026/10/03/litter-robot-4-review-fed-up-with-scooping-cat-litter-try-this/)
- CNN Underscored: Drawer needed emptying about once a week with two cats; quieter than the Litter-Robot 3; cats took about a week to adjust. [Source](https://amp.cnn.com/cnn/cnn-underscored/reviews/litter-robot-4-review)

## Questions buyers ask

### Which is better, the PetSnowy SNOW+ or the Whisker Litter-Robot 4?

The PetSnowy SNOW+ has a published review score and ranks #6 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the PetSnowy SNOW+ for limiting litter tracking. Pick the Whisker Litter-Robot 4 for one to four average size cats.

### Which is cheaper?

The PetSnowy SNOW+ at $529, versus $699 for the Whisker Litter-Robot 4, checked Nov 4, 2026. Over 3 years with running costs: $529 vs $1,035.

### What is the difference between the SNOW+ and the Litter-Robot 4?

Cat weight range: 3.3 to 20 lb (Cats.com); PetSnowy says 3.3 lb minimum for automatic mode on the SNOW+, 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4. Max cats: Up to 4 recommended on the SNOW+, Up to 4 on the Litter-Robot 4. Waste drawer: 10 L auto sealing bin, up to 14 days for one cat (maker claim) on the SNOW+, Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4.

Full reviews: [PetSnowy SNOW+](https://robotsforthat.com/robot/petsnowy-snow-plus/index.md), [Whisker Litter-Robot 4](https://robotsforthat.com/robot/whisker-litter-robot-4/index.md)