RELEASED 2019.09REASSESSED 2026.08.07

HOBOT

Hobot 298

Name: Hobot 298
Brand: HOBOT

Low cost of entry and straightforward operation for single-story windows. Wired design simplifies extended runs; square pad geometry limits corner coverage compared to edge-detection competitors.

Autonomy Ladder

Why Level II.

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.
IIIConditional AutonomyFinishes whole jobs in familiar spaces; struggles at the edges.
To reach Level IIIMost sessions finish without intervention. Rescue is occasional, not routine.
IIAssisted AutonomyThis robot

Hobot 298 runs preset routines on its own, and the owner is its recovery system.

Navigation and control

Onboard edge detection with Smart Route Plan and selectable path modes; run from the app or the bundled infrared remote. Placement on each pane is manual.
Why this level
- Vacuum-based edge detection triggers repositioning when the nozzle approaches frame edges.
- Within a single pane the robot runs HOBOT's Smart Route Plan, a preprogrammed path selected from fixed cleaning modes rather than a map it builds.
- Control is by smartphone app over Bluetooth or by the bundled infrared remote.
- The operator places the machine, selects the mode and carries it to the next pane.
- Classified Level II: it executes a planned pass inside a set work area without selecting or sequencing the work.
Autonomy dimension 42 / 100 · 4 sources reviewed
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources we reviewed.

Provisional4 sources reviewed

Enough has been reviewed to classify, but gaps remain across source types.

Sources reviewed

Specification sources2 sourcesReviewed

Pages the published specifications were read from.

Monitoring record2 sourcesReviewed

Sources behind the tracker entries following this robot.

Also monitored, nothing listed yet

Manufacturer documentationPending

Hobot specifications, user manual, and ultrasonic spray technology documentation.

Press & video reviewsOngoing

Third-party reviews evaluating pad performance, cable management, and suction durability.

Owner reportsOngoing

Long-term user forums and Amazon reviews documenting 5+ years of field reliability across residential installations.

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

Hobot 298 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
- Shipping via Amazon and major retailers since late 2019.
- Setup requires a socket within the 4 meter power cord and manual pad attachment; the supplied 4.5 m safety rope ties to a sturdy fixture indoors able to withstand 150 Kgf.
- Weekly pad cleaning and monthly motor inspection are standard.
- Owner reports span 5+ years with stable reliability for flat-pane use.
On the record
- Shipping since September 2019 · 84 months on the market
- Retail listings on file: Amazon
- No successor announced
- 4 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

65of 100

CapableAt or above 39% of the 436 robots we scoreand 71% of the 21 scored robot window cleaners

DeficientLimitedCapableStrongExemplary

Measured on 8 of the 9 inputs14% not counted

Our assessment did not establish an independent source for software stability 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

Field failure rate85+2.4
Support longevity82+2.0

Held back by

Routine maintenance32−4.2
Task completion58−2.2
Coverage and navigation52−1.8

Capability40% of the score56What it does without you.

Task completion16% of the score58

Evidence

Modern Castle's own test scored the outside pane 80 percent and the inside 94 percent and listed the flaws as 'The Hobot was not able to reach the edges of the glass,' 'The dust outside was too thick for the Hobot to remove completely' and 'There were some streaks left on the glass'; ZDNet found that 'on very dirty windows with traffic grime, it does leave smears, even after dry wiping first.' It runs a pane end to end without help, but a person finishes the border and anything heavily soiled.

Coverage and navigation10% of the score52

Evidence

ZDNet describes a planned path: 'The 298 follows a structured zig-zag path across the window spraying ahead of it as it goes,' about 2 minutes 24 seconds per square meter, and the tester watched 'how it mapped out its path across the windows'; Modern Castle found it did not reach the glass edges. Systematic inside a pane, with the pane re-established at every placement and the border left short.

Edge-case recovery10% of the score56

Evidence

ZDNet reports that when the cycle is interrupted 'the robot will stop and beep, and red and blue lights will flash,' and that it holds the glass and 'never falls off,' with the safety cord carabineer fixed as backup against a drop. It halts, signals audibly and visually and waits for a person rather than falling or damaging itself, which is the halt-and-report band rather than self-recovery.

Operating envelope4% of the score57

Evidence

ZDNet: 'In use, the robot prefers larger window panes. It struggles if it does not have much space to maneuver. However, on large expanses, the robot is superb, albeit slow'; Modern Castle got a decent but unimpressive first result and a much better one only after pre-spraying the glass with cleaner. It needs a large pane and lightly soiled glass, which is a prepared setting rather than a single documented weak condition.

Dependability40% of the score84Whether it keeps doing it.

Field failure rate16% of the score85

Evidence

Seven years since the September 2019 release with owner reports spanning five-plus years of residential use described as stable on flat panes, no recall and no systemic defect. One job-stopping mode is documented and it sits exactly on the anchor: vacuum motor suction falling below specification, typical at the five to six year mark with regular use, which is at expected service life and repairable with an orderable assembly at about 80 dollars. Evidence is long-tail forum and retail review reporting with no links on file, so the retail-review ceiling applies and is not binding here.

Software stabilitynot countedno source verified71

Evidence

No update channel is established. The record carries no firmware source of any kind, the machine has Bluetooth only with no Wi-Fi, and control is preset path modes selected from an app or the bundled infrared remote rather than software that evolves. Rule 1 applies: having little to update is not stability. Scored just above the no-channel floor because a Bluetooth app is at least a possible delivery path, not because anything on file suggests one is used.

Support longevity10% of the score82

Evidence

A strong parts position, and it is concrete rather than promised: three named wear items with prices and intervals, being pads at 20 to 25 dollars a pair every three to four months, a motor intake filter at about 15 dollars annually, and a replacement vacuum motor assembly at about 80 dollars at the five to six year mark. Seven years on sale and still shipping through Amazon and major retailers, from a specialist manufacturer with a current product line above it. No support term or end-of-support date is published.

Ownership burden20% of the score46What it asks of you.

Routine maintenance12% of the score32

Evidence

Four scheduled items, every one of them hands-on, plus a per-pane setup that no cordless machine carries. Weekly: rinse the pad, inspect the nozzle for mineral deposits, and listen to the motor for speed consistency. Monthly: brush the intake ports and motor filter and soak the nozzle in vinegar if the spray weakens. Quarterly pads and a power cable insulation check, annual filter replacement and a nozzle soak in 50/50 vinegar and water. Before each pane the owner routes 4 meters of cord to a socket, ties the rope to a rated fixture, carries the machine over, and afterward does the corner pass by hand.

Consumables8% of the score66

Evidence

Everything is orderable, priced and cheap in absolute terms, with no subscription and no metered supply: pads at 20 to 25 dollars a pair every three to four months, a 15 dollar filter annually, and an 80 dollar motor assembly once at five or six years. What holds this at the midpoint is the ratio the anchor asks about. Roughly 85 dollars a year against a machine currently selling at 199 dollars is a large share of the purchase price each year, larger than any other window record here.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year cost$745

Low in absolute terms and high relative to the machine. 199 dollars at the current price against a 249 dollar MSRP, plus roughly 330 dollars of cleaning pads over five years at the three to four month interval, 75 dollars of annual motor intake filters, one 80 dollar vacuum motor assembly at the five year mark, which the record documents as a predictable wear replacement rather than a failure, and about 60 dollars of cleaning solution and vinegar. No subscription. The five-year running cost exceeds the purchase price.

Data postureLocal

Core function needs no account and no network.

What leaves the homeNot documented

Read the full methodology →

FIT CHECK

Will the Hobot 298 work on your windows?

Describe your windows using the controls. Each choice reads the spec sheet for you, flagging where the Hobot 298 is built for your space and where it isn’t.

Window style

Frame style

Building height

Power preference

See every window cleaner suited to these conditions

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

Dimensional drawing

Key specificationsManufacturer-published

Footprint: 9.4 × 9.4 in · 3.5 in tall•
Weight: 2.6 lbs•
Cleaning width: 9.4 in•
Backup battery runtime: 20 min•
Safety rope rating: 331 lb•
Min pane size: 15 in•
Power type: Mains-corded, 100-240V AC•

Where it lands · ranked across 27 robot window cleanersThis robotMedianTypical range

Adhesion2,800Pamode not stated

2,800 Pa10,000 Pa

Bottom of range

Price$249

$150$850

Near median

Noise65dB

63 dB75 dB

Near median

Weight2.6lbs

1.3 lbs4.8 lbs

Below median

Position shows where the figure sits across the tracked category, not a quality judgment. The vacuum holding the robot on the glass, not cleaning power. The figure has no standard test method, so it is comparable only within a brand and generation.

Official referencesProduct page

OWNERSHIP

Living with it.

Six years of stable operation; vacuum motor wear is the predictable failure point, not sudden breakdowns.

Owner reports from 2019 onwards document consistent performance with gradual motor degradation at 4-5 year mark. Suction loss tracks with nozzle clogging and filter accumulation, both preventable with maintenance. No major design recalls or firmware regressions (mechanical, not software-driven).

Owner effort~45 minhands-on per month

Consumables$60replaceable parts / yr

Reliability trend Stableowner-reported arc

What goes wrong · 4 documented · 0 self-recover

Common

Spray nozzle cloggingStreaking, water pooling, reduced cleaning efficacy

Owner fixSoak nozzle in distilled vinegar for 1 hour monthly. Replace if mineral buildup persists; spare nozzles ~$20-30.

Occasional

Vacuum motor suction lossRobot cannot grip glass or reposition reliably near edges

Owner fixClean intake ports and filter monthly; replace filter annually (~$15). Motor replacement (~$80) typically needed at 5-6 year mark.

Occasional

Pad material tearing or pad holder weakeningPad slips during operation, uneven cleaning, edge misalignment

Owner fixInspect pad holder weekly; replace pads every 3-4 months (~$20-25 per pair).

Rare

Power cable fraying or insulation damageLoss of power mid-cycle, electrical hazard if wet-exposed

Owner fixInspect cable monthly; avoid sharp corners or foot traffic. Replace if outer insulation cracks; cable assembly ~$40-60.

Upkeep routine

Weekly52×/yr

Rinse pad and inspect nozzle for mineral deposits; test suction by listening for motor speed consistency.

Monthly12×/yr

Clean intake ports and motor filter with soft brush; soak nozzle in distilled vinegar if spray pattern weakens.

Seasonal4×/yr

Replace cleaning pads (~$20-25 per pair); inspect power cable for insulation damage.

Yearly1×/yr

Replace motor intake filter (~$15); deep-clean nozzle assembly by soaking in 50/50 vinegar-water solution.

As neededno fixed schedule

Replace vacuum motor assembly if suction falls below specification (~$80, typical at 5-6 year mark with regular use).

Cost over time · past the sticker

PurchaseRunning cost

Year 1

$309

Year 3

$429

Year 5

$549

$249 to buy, then about $60 a year for the replaceable parts below. Over three years that is roughly $180 past the sticker price. Excludes electricity and any repairs.

What you replace

Mop padEvery 3-4 months$20–25
FilterAnnually$15

Replacement cadence from the maintenance schedule; prices shown where the source documents them.

Safety notes

CautionElectrical hazard in wet conditions: Wet cable near power source creates shock risk. Keep outlet and connection dry; use circuit breaker or GFCI protection.

NoteSuction-grip dependency at height: Robot relies solely on suction for grip; no secondary tether exists. Inspect intake and filter before each use at elevated heights.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Aug 2026 · AssessmentRecord status: Verified → Provisional
Aug 2026 · AssessmentRobovations Score revised 69 → 65
Aug 2026 · AssessmentRobovations Score revised 64 → 69
Aug 2026 · AssessmentRobovations Score rescored under v4.2: 62 → 64
Aug 2026 · AssessmentRobovations Score rescored under v4.0: 68 → 62
Jul 2026 · AssessmentRobovations Score revised 66 → 68
Jul 2026 · AssessmentRobovations Score recorded at 66 of 100
Jan 2019 · AnnouncementHOBOT-298 named a CES 2019 Innovation Awards honoree before US launch

Editorial comparisons

How Hobot 298 compares.

All comparisons →

Tech shift

Corded power vs cordless freedom: which window-cleaning robot architecture fits your windows?

Ecovacs Winbot W2 Pro Omni + 3 more

Read comparison

Common questions

What people actually ask.

4 answered

OperationCan I use a standard extension cord with the Hobot 298?

The supplied power cord is 4 meters, so the question comes up quickly. Extending it introduces a joint that can be pulled apart mid-run, and losing power to a machine held on glass by suction is not a minor fault: the embedded UPS then keeps the suction fan running and the robot in position for 20 minutes with a continuous audible alert, which is retrieval time rather than operating time. If a socket is not within the cord’s reach, moving the work to a pane that is served is the safer answer than lengthening the run.

OperationDoes the square pad reach corners on all window types?

The microfiber cloth is 24 x 24 cm, about 9.4 x 9.4 inches, and square. Its corners cannot reach fully into a pane’s corners, so a manual corner pass after the main run is typical. Older reviews cite this as the primary cosmetic limitation.

OperationHow often should I inspect the vacuum motor?

Monthly inspection of intake ports and filter is recommended. Clean every 4-6 weeks in hard-water areas where mineral spray residue clogs intake. Replace filter annually or if suction drops visibly.

OperationIs the Hobot 298 suitable for second-story windows?

HOBOT publishes no height limit for the 298. What it does specify is the rigging: tie the supplied 4.5 meter safety rope to a sturdy fixture indoors that can withstand 150 Kgf, not to a gutter, a roof fitting or anything else outside the window. The rope’s 4.5 meter length is the practical bound on how far the robot can work from that anchor. If mains power is lost, the embedded Li-Po UPS keeps the suction fan running and the robot in position for 20 minutes with a continuous audible alert, which is the window you have to retrieve it in. Always test on a lower pane first.

Availability

Where it's sold

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Cite / Embed

Reference the Hobot 298 classification.

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Citation

Robovations. "Hobot 298: Autonomy Level II (Assisted Autonomy)." Autonomy Ladder™, assessed August 2026. https://robovations.com/robots/hobot-298/

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Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Hobot 298 and Ecovacs Winbot Mini side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with HUTT DDC55, HOBOT 388 Ultrasonic, Mamibot iGLASSBOT W120-T.

For browsers

See every Level II.

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

Browse the database

Updated weekly with new entries and reclassifications.

Hobot 298

Will the Hobot 298 work on your windows?

The full spec sheet.

Living with it.

How the assessment has moved.

How Hobot 298 compares.

Corded power vs cordless freedom: which window-cleaning robot architecture fits your windows?

What people actually ask.

Hobot 298 in the analysis archive.

Are robot window cleaners safe? How anti-fall tethers and backup power work

Other robot window cleaners we have classified.

Kärcher RCW 4

Kärcher RCW 2

Ecovacs Winbot W2S Pro Omni

Tosima W5 Window Cleaning Robot

Where it's sold

Reference the Hobot 298 classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level II.