SCORED
A well tested globe box with a long track record and a large parts and support network, now $100 cheaper than the Litter-Robot 5. Owners of big cats over 25 lb, or anyone who wants urine vs stool detection, should look at the 5 instead.
Best for: one to four average size cats. Skip if: your cat is over 25 lb.
- Cat weight range
- 3 to 25 lb (kittens under 3 lb need semi automatic mode)
- Max cats
- Up to 4
- Waste drawer
- Sealed drawer with carbon filter, as little as once every 8 days (maker claim)
- Sensors
- Laser and weight sensors, SmartScale cat weight tracking, SafeCat system
- App
- Whisker app (2.4 GHz WiFi); free 7 day view, Whisker+ optional
- Litter type
- Clumping clay recommended; crystals only if they pass the screen; plant based 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
- Noise
- No dB rating published; QuietSift motor
- Robot
- $699
- Whisker+ membership (optional)
- $240
- 3 year WhiskerCare plan (optional)
- $129
- Total
- $1,068
Whisker says to replace the carbon filter and OdorTrap packs every 2 to 4 weeks; prices not captured.
- US availability
- ● On sale
- Recalls
- No CPSC recall found as of 2026-10-14 (search of cpsc.gov recall listings via web search; the CPSC database itself could not be queried directly from our tools, recheck before publishing)
- FCC authorized
- Not checked
- Company
- ● Active
- Warranty
- ● 1 year (WhiskerCare), extendable to 3 years; 90 day in home trial
Tracking started Oct 14, 2026 at $699.
Each day adds a point. Turn on a price alert to hear about drops.
- Whisker store
- $699 →
Affiliate links. We may earn a commission. It never changes our score. Disclosure
- Long track record and wide parts availability
- Laser plus weight sensing with SafeCat
- Free app weight tracking
- 90 day in home trial
- Smaller litter bed than the 5 series
- Fine grain clumping litter only, not tofu
- Early units had sensor complaints
- Bulky, needs a 22 x 27 in spot
- Runner Up in the October 2026 roundup; reliable and well built, but the smaller litter bed may not suit large cats.
- Cats.com
- 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.
- The Irish Times
- Drawer needed emptying about once a week with two cats; quieter than the Litter-Robot 3; cats took about a week to adjust.
- CNN Underscored
Email me when Litter-Robot 4 gets cheaper
One email per real drop. Nothing else.
Own one? Share your results
Owner reviews and questions open next month. Save this robot to get a ping.
Questions buyers ask
Can kittens use the Litter-Robot 4?
Whisker says kittens of at least 3 lb can use automatic mode; lighter kittens need semi automatic mode.
Is it still sold now that the 5 is out?
Yes. Whisker lists it at $699 as of October 2026.