RELEASED 2025.10REASSESSED 2026.09.15

Whisker

Whisker Litter-Robot EVO

Name: Whisker Litter-Robot EVO
Brand: Whisker

Whisker's smallest self-cleaning litter box trims the Litter-Robot to a 20.6 by 24.3 in footprint for one or two cats. Reviewers found odor control and quiet cycling held up, with occasional incomplete waste drops and weight misreads.

Autonomy Ladder

Why Level III.

One five-rung scale, every category, from acting only on command to working unsupervised anywhere.

VGeneralized AutonomyAny task, any setting. No consumer robot has reached it.
IVEnvironmental AutonomyCopes with everyday clutter and frees itself, shown by independent testing.
To reach Level IVIndependent testing shows it avoids ordinary obstacles before contact, copes without the space being cleared, and frees itself when stuck.
IIIConditional AutonomyThis robot

Whisker Litter-Robot EVO finishes whole jobs in a space it already knows, and still needs a person at the edges.

Navigation and control

None (stationary enclosure; no locomotion)
Why this level
- A weight sensor detects each visit, waits a set delay and rotates the globe to sift waste into a sealed drawer, and anti-obstruction sensors pause the cycle if a cat returns, per Whisker and Apartment Therapy.
- People still empty the drawer, add litter and restart the occasional incomplete cycle.
- Classified Level III, matching Whisker's current Litter-Robot 5.
Autonomy dimension 70 / 100 · 8 sources reviewed
IIAssisted AutonomyRuns preset routines; stalls at anything new.
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources we reviewed.

Verified8 sources reviewed

Sufficient public evidence across source types to publish a non-provisional classification.

Sources reviewed

Manufacturer documentation3 sourcesReviewed

Whisker US launch release, EVO product page and Canada launch announcement

Press & video reviews3 sourcesReviewed

Home-use reviews from Apartment Therapy, Vetstreet and Hello Subscription

Owner reports1 sourceOngoing

Buyer reviews hosted on litter-robot.com, 23 reviews averaging 4.7 on 14 Sep 2026

Litter-Robot EVO customer reviewsWhisker

Monitoring record2 sourcesReviewed

Sources behind the tracker entries following this robot.

How we evaluate evidence →

Human Readiness

Ready Now.

One question: what does buying this robot today walk you into? The state is computed from the record, and recomputed daily.

Ready NowThis robot

Whisker Litter-Robot EVO is on sale, assessed, and nothing on its record argues for waiting.
How this was derived
- Shipping past the first-90-day ownership window with a published assessment, no documented issues on record, and no announced successor.
Notes on the record
- Whisker put the EVO on sale in the US on 21 Oct 2025 at $599, with pre-orders opening that day and shipments from 3 Nov 2025; the recorded date is that sale opening.
- Canadian pre-orders followed on 1 Jun 2026 at CAD 899.
On the record
- Shipping since October 2025 · 10 months on the market
- Retail listings on file: Amazon
- No successor announced
- 8 sources reviewed
What would move it
A documented problem, an announced successor, or a withdrawn listing moves it out; the rating recomputes daily.
New to MarketOn sale under 90 days; the ownership record is still forming.
WaitA successor is announced and has not shipped; re-read the decision when it arrives.
Known IssuesDocumented problems stand on the record; read the case before buying.

How we assess readiness →

Robovations Score

How this number was reached

71of 100

StrongAt or above 73% of the 431 robots we scoreand 96% of the 23 scored specialty robots

DeficientLimitedCapableStrongExemplary

Measured on 8 of the 9 inputs16% not counted

Our assessment did not establish an independent source for field failure rate on this machine, so that input is left out of the score rather than guessed at, and the rest re-weighted to fill the space. A gap in what we have been able to verify is not evidence against the robot. Where a whole pillar has nothing measured, we publish no number at all.

What moved itpoints gained or lost against a typical robot

Carried by

Edge-case recovery70+1.8
Support longevity72+1.0
Routine maintenance74+0.8

Capability40% of the score71What it does without you.

Task completion16% of the score76

Evidence

Litter boxes: Hello Subscription saw minimal clogs and no missed cycles, and Vetstreet's reviewer found odor well contained after two weeks with two cats. Apartment Therapy saw a few cycles fail to drop all sifted waste, cleared by a manual cycle.

Coverage and navigation10% of the score68

Evidence

Litter boxes (visit sensing): Apartment Therapy found weight readings sometimes far off when the cat leaned out onto the step, and Vetstreet notes the scale tells cats apart unless they are close in size.

Edge-case recovery10% of the score70

Evidence

Litter boxes: Apartment Therapy observed the anti-obstruction sensors pause the cleaning cycle instantly when the cat put its head in, and incomplete waste drops needed a manual cycle from the unit or app.

Operating envelope4% of the score62

Evidence

Litter boxes: Whisker limits the EVO to two cats of 3 to 19 lb, clumping litter and 2.4 GHz Wi-Fi. Apartment Therapy placed it in a small apartment, and Hello Subscription found the smaller drawer fills faster than larger models.

Dependability40% of the score71Whether it keeps doing it.

Field failure ratenot countedno source verified70

Evidence

Under twelve months of field record: US shipments began on 3 Nov 2025, so the input sits at its 70 cap. The reviews found cover weeks of use, and no independent failure evidence was found in either direction.

Software stability14% of the score70

Evidence

Hello Subscription found app notifications for a full drawer timely and accurate, Vetstreet's reviewer onboarded through the Whisker app within minutes, and Apartment Therapy relied on app status alerts. No firmware update history was found.

Support longevity10% of the score72

Evidence

Scored as commitments: Whisker includes a 1-year WhiskerCare plan covering breakdowns and accidental damage with free two-way shipping, sells a 3-year plan for $100, offers a 90-day in-home trial and runs US-based repair.

Ownership burden20% of the score71What it asks of you.

Routine maintenance12% of the score74

Evidence

Litter boxes: Apartment Therapy found emptying the drawer easy and the full-drawer indicators helpful, while Hello Subscription found the smaller drawer needs emptying more often than larger Litter-Robots. Whisker suggests up to 7 days between emptying for one cat.

Consumables8% of the score66

Evidence

Recurring parts are waste drawer liners, carbon filters and OdorTrap packs, with carbon filters and OdorTrap packs replaced every 2 to 4 weeks per Whisker (priced by the consumables engine). Whisker+ is optional.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year costNot costed

$599 list price with a 1-year WhiskerCare plan included and a 3-year plan for $100. Liners, carbon filters and OdorTrap packs recur; Whisker+ is optional at $7.99 a month or $79.90 a year.

Data postureCloud-linked

Account required. Maps and telemetry leave the home; core function survives an outage.

What leaves the homeDocumented

A weight sensor logs each visit and each cat's weight, and the Whisker app keeps seven days of history free or up to two years with Whisker+. The EVO has no camera. App features need 2.4 GHz Wi-Fi, and Whisker says the app does not work outside the US and Canada.

On-device processingNo

Read the full methodology →

FIT CHECK

Will the Whisker Litter-Robot EVO fit your application?

Describe your use case using the controls. Each choice reads the spec sheet for you, flagging where the Whisker Litter-Robot EVO is built for your space and where it isn’t.

Number of Cats

Cat Size

Litter Type

Placement

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Priced near the category median, with every figure charted against the category below.

Dimensional drawing

Key specificationsManufacturer-published

Footprint: 20.6 × 24.3 in · 27.6 in tall
Weight: 21.5 lbs
Wi-Fi: Supported
Entryway size: 14.85 in x 14.85 in
Cat weight range: 3-19 lbs
Max cats: 2
Waste drawer interval: Up to 7 days (1-cat household)
Interior height: 14.5 in
Wi-Fi: 2.4 GHz only

Where it lands · ranked across 43 specialty robotsThis robotMedianTypical range

Price$599

$29$100,000

Bottom of range

Weight21.5lbs

0.09 lbs136.2+ lbs

Near median

Position shows where the figure sits across the tracked category, not a quality judgment.

Official referencesProduct page

OWNERSHIP

Living with it.

Eleven months on sale, with early reviews reporting consistent cycling.

Hello Subscription saw minimal clogs and no missed cycles, and Apartment Therapy saw a few incomplete waste drops fixed by a manual cycle. No independent long-term failure record exists yet.

Reliability trendUnprovenowner-reported arc

What goes wrong · 4 documented · 0 self-recover

Common

Waste drawer fills quicklyMore frequent drawer emptying

Owner fixEmpty the drawer when the app sends a full alert

Occasional

Incomplete waste dropClumps left in the globe

Owner fixRun a manual cycle on the unit or app

Occasional

Weight reading errorsInaccurate cat weight history

Owner fixReadings recover when the cat sits fully inside

Rare

Drawer sensor misreads litterUnreliable drawer-full alerts

Owner fixSwitch to dark clumping clay litter

Upkeep routine

Monthly12×/yr

Replace the carbon filter and OdorTrap packs, which Whisker recommends every 2 to 4 weeks.

As neededno fixed schedule

Empty the waste drawer and replace the liner when the drawer-full indicator lights; Whisker suggests up to 7 days for one cat. · Top up clumping clay litter to the fill line. · Deep-clean the globe using Whisker's modular EasyClean design.

Cost over time · past the sticker

$599 to buy. Ongoing running cost for this model hasn’t been assessed yet.

Safety notes

CautionRotating globe with cat access: Anti-obstruction sensors pause the cycle when a cat enters; kittens under 3 lb need semi-automatic mode.

NoteSmall kittens not detected: Cycles start by weight, so cats under 3 lb may not register; supervise small kittens.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Sep 2026 · AssessmentReadiness assessed as Ready Now
Sep 2026 · AssessmentRobovations Score recorded at 71 of 100
Oct 2025 · ReleaseWhisker launches Litter-Robot EVO at $599 as its most compact model

Common questions

What people actually ask.

5 answered

OperationWhen did the Litter-Robot EVO go on sale?

Whisker opened US orders on 21 Oct 2025 at $599 and began shipping on 3 Nov 2025. Canadian pre-orders opened on 1 Jun 2026 at CAD 899, with shipping from 22 Jun.

OperationHow many cats can use the Litter-Robot EVO?

Whisker rates it for up to two cats weighing 3 to 19 lb. Kittens under 3 lb should use it in semi-automatic mode with the unit off.

OperationWhat litter works in the Litter-Robot EVO?

Whisker recommends standard-weight clumping clay. Some silica passes the screen, but translucent or white crystals can affect the drawer-full sensor, and pine, paper and pellet litters do not sift.

OperationDoes the Litter-Robot EVO need a subscription?

No. The free Whisker app shows seven days of visits and cat weights. Whisker+ costs $7.99 a month or $79.90 a year and adds up to two years of history and trends.

OperationHow does the EVO differ from the Litter-Robot 4?

Whisker says the EVO is a smaller, lower-priced model for one or two cats, while the Litter-Robot 4 handles up to four cats and supports accessories such as LitterHopper.

Availability

Where it's sold

We may earn commission from qualifying purchases. This does not influence classification.

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Cite / Embed

Reference the Whisker Litter-Robot EVO classification.

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Citation

Robovations. "Whisker Litter-Robot EVO: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed September 2026. https://robovations.com/robots/whisker-litter-robot-evo/

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A classification, not an endorsement. It may not appear beside language implying Robovations recommends, rates, or approves the product.

Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Whisker Litter-Robot EVO and Whisker Litter-Robot 5 Pro side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Labrador Systems Retriever, Piaggio gitaplus, Deep Robotics X30.

For browsers

See every Level III.

Every robot we’ve classified at conditional autonomy. Sorted by readiness, score, and price. Filter by category, manufacturer, or release date.

Browse the database

Updated weekly with new entries and reclassifications.

Whisker Litter-Robot EVO

Will the Whisker Litter-Robot EVO fit your application?

The full spec sheet.

Living with it.

How the assessment has moved.

What people actually ask.

Other specialty robots we have classified.

Labrador Systems Retriever

Whisker Litter-Robot 5 Pro

Piaggio gitaplus

Deep Robotics X30

Where it's sold

Reference the Whisker Litter-Robot EVO classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level III.