homerunPET CS106 vs Whisker Litter-Robot 4

Researched by Riley Hart · prices checked Nov 4, 2026

Short answer · checked Nov 4, 2026

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. The homerunPET CS106 wins 2 of 4 points we can measure (2 tied).

Who wins, point by point

The homerunPET CS106 wins 2 of 4 points we can measure (2 tied). Built from today's prices, the specs and independent tests for these two robots.

	CS106	Litter-Robot 4	Winner
Price today	$699	$699	Tie
3 year cost	$699	$1,035	CS106
Warranty	12 months	1 year	Tie
Cats supported	5 (tested)	4	CS106

Pick the CS106 if

You care most about 3 year cost ($699 vs $1,035)
You care most about cats supported (5 (tested) vs 4)
Best for multi cat homes with big cats

Pick the Litter-Robot 4 if

Best for one to four average size cats

Litter box

homerunPETCS106

Cat weight: 3.3 to 25 lb
Max cats: No maximum published
Litter: Clumping clay
Waste drawer: 12 L waste bin

6.5/10Price tracked daily

$699Check price at Amazon →

Extra large dome box with auto litter refill for big multi cat homes

Full homerunPET CS106 review, pros and cons →

Litter box

WhiskerLitter-Robot 4

Cat weight: 3 to 25 lb
Max cats: Up to 4
Litter: Clumping clay
Waste drawer: Sealed

ON SALEPrice tracked daily

$699Check price at Amazon →

Proven Litter-Robot with laser sensing, now Whisker's value pick

Full Whisker Litter-Robot 4 review, pros and cons →

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

Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.

What reviewers found

homerunPET CS106

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
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

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
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

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.

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