# homerunPET CS106 vs Whisker Litter-Robot 4

As of Nov 4, 2026, the homerunPET CS106 costs $699 and the Whisker Litter-Robot 4 costs $699. The homerunPET CS106 has a published review score and ranks #15 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the homerunPET CS106 for multi cat homes with big cats. Pick the Whisker Litter-Robot 4 for one to four average size cats.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/homerunpet-cs106-vs-whisker-litter-robot-4/

## Side by side

| | homerunPET CS106 | Whisker Litter-Robot 4 |
|---|---|---|
| Price | $699 | $699 |
| 3 year cost | $699 | $1,035 |
| Our score | 6.5/10 | Not scored yet |
| Rank in Litter box | #15 | #23 |
| Status | on sale | on sale |
| Warranty | 12 months; 90 day in home trial (TechnoMeow) | 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial |
| Cat weight range | 3.3 to 25 lb (TechnoMeow, from maker specs); Cats.com lists a 3 lb minimum and no stated maximum | 3 to 25 lb (kittens under 3 lb need semi automatic mode) |
| Max cats | No maximum published; TechnoMeow tested it with 5 cats and says it suits homes with 3 or more | Up to 4 |
| Waste drawer | 12 L waste bin (Cats.com, CGMagazine, TechnoMeow) | Sealed drawer with carbon filter, as little as once every 8 days (maker claim) |
| Sensors | Radar at the entrance, 4 weight sensors in the base, TOF laser litter level sensors, anti pinch dome gap (TechnoMeow) | Laser and weight sensors, SmartScale cat weight tracking, SafeCat system |
| App | homerunPET app with visit tracking, cleaning delay, schedules, child lock and night mode; 2.4 GHz Wi-Fi only (Cats.com); touch panel works without the app | Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional |
| Litter type | Clumping clay, tofu and mixed tofu clay (TechnoMeow) | Clumping clay recommended; crystals only if they pass the screen; plant based and pellet litters not recommended |
| Size | 27.44 x 23.62 x 28.07 in, 44 lb, 106 L dome, entry 10.24 x 10.63 in (Cats.com) | 22 x 27 in footprint, 29.5 in tall, 15.75 x 15.75 in entry, 24 lb empty |
| Noise | 38.8 dB peak (maker figure quoted by Cats.com and TechnoMeow); CGMagazine could not hear a cycle from about 5 ft | No dB rating published; QuietSift motor |
| Auto refill | 4.5 L refill tank, refills when litter drops below 6 L, up to 14 days per refill (Cats.com, TechnoMeow) | n/a |
| Best for | multi cat homes with big cats | one to four average size cats |
| Skip if | you have little floor space or one small cat | your cat is over 25 lb |

## What reviewers found

### homerunPET CS106

- TechnoMeow: Tested with five cats, two near 15 lb; cats adapted at once, noise barely noticeable, sensors stopped the cycle when the tester came close; filter swap took about 20 minutes and app pairing needed a manual retry. [Source](https://technomeow.com/homerunpet-self-cleaning-litter-box-review/)
- CGMagazine (9): Tested a few weeks with two cats; no odor after cycles, cycle inaudible from about 5 ft, reinforced liner held up; one app glitch when too many commands were sent. [Source](https://www.cgmagonline.com/review/hardware/homerunpet-cs106-self-cleaning-litter-box/)
- Cats.com (4.2/5): Tested several weeks with two cats; odor was not a problem despite no dedicated odor system, radar sensors were at times oversensitive, and a longhaired cat tracked litter since there is no step or mat. [Source](https://www.cats.com/homerunpet-self-cleaning-litter-box-review)

### 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 homerunPET CS106 or the Whisker Litter-Robot 4?

The homerunPET CS106 has a published review score and ranks #15 in our self cleaning litter boxes ranking; the Whisker Litter-Robot 4 is not scored yet. Pick the homerunPET CS106 for multi cat homes with big cats. Pick the Whisker Litter-Robot 4 for one to four average size cats.

### What is the difference between the CS106 and the Litter-Robot 4?

Cat weight range: 3.3 to 25 lb (TechnoMeow, from maker specs); Cats.com lists a 3 lb minimum and no stated… on the CS106, 3 to 25 lb (kittens under 3 lb need semi automatic mode) on the Litter-Robot 4. Max cats: No maximum published; TechnoMeow tested it with 5 cats and says it suits homes with 3 or… on the CS106, Up to 4 on the Litter-Robot 4. Waste drawer: 12 L waste bin (Cats.com, CGMagazine, TechnoMeow) on the CS106, Sealed drawer with carbon filter, as little as once every 8 days (maker claim) on the Litter-Robot 4.

Full reviews: [homerunPET CS106](https://robotsforthat.com/robot/homerunpet-cs106/index.md), [Whisker Litter-Robot 4](https://robotsforthat.com/robot/whisker-litter-robot-4/index.md)