# Whisker Litter-Robot 4 vs Whisker Litter-Robot 5 Pro

As of Oct 26, 2026, the Whisker Litter-Robot 4 costs $699 and the Whisker Litter-Robot 5 Pro costs $999, so the Whisker Litter-Robot 4 is $300 cheaper. The Whisker Litter-Robot 5 Pro has a published review score and ranks #10 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the Whisker Litter-Robot 4 for one to four average size cats. Pick the Whisker Litter-Robot 5 Pro for multi cat homes wanting health tracking.

Prices checked Oct 26, 2026. HTML version: https://robotsforthat.com/vs/whisker-litter-robot-4-vs-whisker-litter-robot-5-pro/

## Side by side

| | Whisker Litter-Robot 4 | Whisker Litter-Robot 5 Pro |
|---|---|---|
| Price | $699 | $999 |
| 3 year cost | $1,035 | $1,155 |
| Our score | Not scored yet | 6.4/10 |
| Rank in Litter box | #16 | #10 |
| Status | on sale | on sale |
| Warranty | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 3 to 25 lb (kittens under 3 lb need semi automatic mode) | 3 to 30 lb |
| Max cats | Up to 4 | Up to 5 |
| Waste drawer | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) | Sealed drawer with carbon filter, about 10 days between emptyings for one cat (maker claim) |
| Sensors | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system | Multiple lasers, SmartScale weight sensing, WasteID urine vs stool detection, SafeCat system |
| App | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional | Whisker app; dual 1080p night vision cameras; Whisker+ optional at $7.99/month |
| Litter type | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended | Clumping clay recommended; crystal, plant based, paper and pellet litters not recommended |
| Size | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty | 22 x 27 in footprint, 29.9 in tall, 15.75 x 15.75 in entry, 29.6 lb empty |
| Noise | No dB rating published; QuietSift motor | No dB rating published; QuietSift motor |
| Best for | one to four average size cats | multi cat homes wanting health tracking |
| Skip if | your cat is over 25 lb | you do not want a subscription or cameras |

## What reviewers found

### 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)

### Whisker Litter-Robot 5 Pro

- Cats.com: Named Overall Best in its October 2026 roundup of 38 tested models. [Source](https://cats.com/reviews/best-self-cleaning-litter-box)
- Cats.com (4.6/5): Odor control and sifting matched the Litter-Robot 4; reviewer could not test facial recognition without Whisker+ and questioned whether cameras justify the extra $100. [Source](https://cats.com/?p=112270)
- 9to5Toys: Quieter and sturdier than the Litter-Robot 4 with better odor control; bin full alert sometimes fired at about half capacity and urine was sometimes labeled as solid waste. [Source](https://9to5toys.com/2026/04/14/review-whisker-litter-robot-5-elevate-homes-with-space-age-improvements/)

## Questions buyers ask

### Which is better, the Whisker Litter-Robot 4 or the Whisker Litter-Robot 5 Pro?

The Whisker Litter-Robot 5 Pro has a published review score and ranks #10 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the Whisker Litter-Robot 4 for one to four average size cats. Pick the Whisker Litter-Robot 5 Pro for multi cat homes wanting health tracking.

### Which is cheaper?

The Whisker Litter-Robot 4 at $699, versus $999 for the Whisker Litter-Robot 5 Pro, checked Oct 26, 2026. Over 3 years with running costs: $1,035 vs $1,155.

### What is the difference between the Litter-Robot 4 and the Litter-Robot 5 Pro?

Cat weight range: 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4, 3 to 30 lb on the Litter-Robot 5 Pro. Max cats: Up to 4 on the Litter-Robot 4, Up to 5 on the Litter-Robot 5 Pro. Waste drawer: Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4, Sealed drawer with carbon filter, about 10 days between emptyings for one cat (maker… on the Litter-Robot 5 Pro.

Full reviews: [Whisker Litter-Robot 4](https://robotsforthat.com/robot/whisker-litter-robot-4/index.md), [Whisker Litter-Robot 5 Pro](https://robotsforthat.com/robot/whisker-litter-robot-5-pro/index.md)