# Smarty Pear Leo's Loo Too vs Whisker Litter-Robot 4

As of Oct 26, 2026, the Smarty Pear Leo's Loo Too costs $700 and the Whisker Litter-Robot 4 costs $699, so the Whisker Litter-Robot 4 is $1 cheaper. Pick the Smarty Pear Leo's Loo Too for odor control in small apartments. Pick the Whisker Litter-Robot 4 for one to four average size cats.

Prices checked Oct 26, 2026. HTML version: https://robotsforthat.com/vs/smarty-pear-leos-loo-too-vs-whisker-litter-robot-4/

## Side by side

| | Smarty Pear Leo's Loo Too | Whisker Litter-Robot 4 |
|---|---|---|
| Price | $700 | $699 |
| 3 year cost | $781 | $1,035 |
| Our score | Not scored yet | Not scored yet |
| Rank in Litter box | #17 | #16 |
| Status | on sale | on sale |
| Warranty | n/a | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 2 lb minimum (Rover); 55 lb maximum (The Gadgeteer) | 3 to 25 lb (kittens under 3 lb need semi automatic mode) |
| Max cats | Not stated | Up to 4 |
| Waste drawer | Lidded drawer with drawstring liners, filled in 7 to 9 days for one cat (NBC Select) | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) |
| Sensors | Radar wall, weight detection and anti pinch sensor | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system |
| App | Casa Leo app with visit log and remote cleaning; Alexa and Google voice control | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional |
| Litter type | Clay clumping litter | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended |
| Size | 22 x 24 x 27.6 in, needs about 1 in wall clearance | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty |
| Noise | 30 dB (maker claim per Tractor Supply) | No dB rating published; QuietSift motor |
| Best for | odor control in small apartments | one to four average size cats |
| Skip if | your cat is noise sensitive or space is tight | your cat is over 25 lb |

## What reviewers found

### Smarty Pear Leo's Loo Too

- Rover: No noticeable drawer smell after an 11 day absence and the app identified a cat by weight; one cat kept hissing at the cycle and avoided the box. [Source](https://www.rover.com/blog/leos-loo-too-review)
- NBC Select: Used for over six months with one cat in a New York City apartment; the drum stopped when the cat approached, and the drawer filled in about 7 to 9 days. [Source](https://www.nbcnews.com/select/shopping/automatic-litter-box-leo-too-review-rcna189883)
- The Gadgeteer: Odor was much lower than a standard box and the cat adjusted within hours; weight sensing may not work on carpet or soft floors. [Source](https://the-gadgeteer.com/2023/07/15/leos-loo-too-automatic-cat-litter-box-review-dandy-at-dealing-with-the-duty-of-doody)

### 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 Smarty Pear Leo's Loo Too or the Whisker Litter-Robot 4?

Pick the Smarty Pear Leo's Loo Too for odor control in small apartments. Pick the Whisker Litter-Robot 4 for one to four average size cats.

### Which is cheaper?

The Whisker Litter-Robot 4 at $699, versus $700 for the Smarty Pear Leo's Loo Too, checked Oct 26, 2026. Over 3 years with running costs: $781 vs $1,035.

### What is the difference between the Leo's Loo Too and the Litter-Robot 4?

Cat weight range: 2 lb minimum (Rover); 55 lb maximum (The Gadgeteer) on the Leo's Loo Too, 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4. Max cats: Not stated on the Leo's Loo Too, Up to 4 on the Litter-Robot 4. Waste drawer: Lidded drawer with drawstring liners, filled in 7 to 9 days for one cat (NBC Select) on the Leo's Loo Too, Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4.

Full reviews: [Smarty Pear Leo's Loo Too](https://robotsforthat.com/robot/smarty-pear-leos-loo-too/index.md), [Whisker Litter-Robot 4](https://robotsforthat.com/robot/whisker-litter-robot-4/index.md)