Can any of these robots be used on third-floor windows without a net or harness below?

None of these robots' records addresses use at third-floor height, so it is not verified for any of them. Each relies on a safety tether rather than a net. The HOBOT 2S uses a 4.5 m safety rope tied to a fixed object indoors, rated at 331 lb. The Ecovacs Winbot W2 Omni's rope is rated at 220 lb and its portable station is the anchor. The Gladwell Gecko's rope is knotted to the robot and clipped to a fixed interior point, and its record states no rating for it.

How do I know if my window frame will work with these robots?

The records give a few checks. The HOBOT 2S's Edge-Leakage Sensor detects the air leak at a window seal or a frameless edge, and it needs a pane of at least 15.7 in. The Ecovacs Winbot W2 Omni lists floor-to-ceiling, small, frameless and tilting windows in its scope, with an 11.8 in minimum pane, but not curved or heavily textured glass. The Gladwell Gecko's edge sensors stop it at the frame. All three rely on suction on smooth, flat glass.

What battery life should I expect for a typical third-floor window?

All three run on mains power while cleaning, so the battery is mainly a backup. The HOBOT 2S runs on a 5 m mains cord with a 20-minute backup battery. The Gladwell Gecko runs on a 13 ft mains lead with a 30-minute backup cell. The Ecovacs Winbot W2 Omni lists a 5.5 m power cord and a 30-minute backup battery, and independent testing in its record measured about 110 minutes, or about 55 sq m, per charge. No record states how long one window takes.

What do I do if the robot loses suction while it is on a high window?

The records describe different outcomes. In independent testing the Ecovacs Winbot W2 Omni lost suction over gaps between panes and did not fall; it stopped and showed an error code, and its record says it holds position for retrieval. For the HOBOT 2S, owner reports name vacuum failure as the most common issue after 100 or more sessions, with the unit falling off the glass. The Gladwell Gecko has no automatic shutdown or self-rescue, so its safety rope is the only protection; it buzzes when it needs help.

Are there any third-floor cleaning incidents documented for these models?

None of these robots' records documents an incident at third-floor height specifically, but they do record related failures. Owner reports for the HOBOT 2S name vacuum failure as the most commonly reported issue after 100 or more sessions, with the unit falling off the glass. The Gladwell Gecko record names loss of grip on glass that was not pre-cleaned as a recurring owner-reported problem. In independent testing, the Ecovacs Winbot W2 Omni lost suction ten feet up, stopped and did not fall.

Can the tether itself break or fray over time?

Any rope can wear, and all three records treat inspection as routine. The HOBOT 2S's 4.5 m safety rope is rated at 331 lb, and its record calls for running the full length through your hands and checking both end fittings before every use. The Ecovacs Winbot W2 Omni's rope is rated at 220 lb, with quarterly rope checks listed. The Gladwell Gecko's record states no rope rating and calls for checking the rope for fraying, glazing and UV damage before every run.

Comparisons · Robot Window Cleaners3 robots · checked 16 Oct 2026

A situation

Robotic window cleaners: which can you trust on a third-floor pane?

A third-floor pane leaves no room for a fall. This page compares what each robot offers if its grip or its power fails: rope rating, power-cut hold time and edge sensing.

This page checks

Safety ropeThe load the rope is rated to catch
Power cutHow long it stays on the glass
Edge sensingWhat each says it detects at the pane edge
Weight and pane sizeWhat hangs on the glass, and the smallest pane

HOBOT

IIAssistedLimited

$349list

Where to buy

Amazon

Sep 2021HOBOT-2S window cleaning robot unveiled ahead of October 2021 US launch

Ecovacs

Winbot W2 Pro Omni

IIAssistedStrong

$499.99list

Where to buy

Amazon

Apr 2025Ecovacs WIN-SLAM 4.0 software update improves edge-detection responsiveness on W2 Pro Omni

Gladwell

Gecko

IIAssistedLimited

$150list

Where to buy

Amazon

No maker page found; US availability not confirmed

Full specifications16 figures on record · 12 differ

Figure

Winbot W2 Pro Omni

Gecko

List price

2S$349

Winbot W2 Pro Omni$499.99

Gecko$150

Released

2SOct 2021

Winbot W2 Pro OmniOct 2024

GeckoJan 2018

Power

2SMains-corded, 5 m cord

Winbot W2 Pro OmniBattery or mains-plugged operation

GeckoMains-corded

Backup hold

2S20 min

Winbot W2 Pro Omni30 min

Gecko30 min

Smallest pane

2S15.7 in

Winbot W2 Pro Omni11.8 in

GeckoNot on record

Safety rope

2S331 lb

Winbot W2 Pro Omni220 lb

GeckoNot on record

Cleaning width

2S9.4 in

Winbot W2 Pro Omni10.2 in

GeckoNot on record

Weight

2S2.87 lb

Winbot W2 Pro Omni3.5 lb

Gecko4.8 lb

Runtime

2SNot on record

Winbot W2 Pro Omni110 min

GeckoNot on record

Charge time

2SNot on record

Winbot W2 Pro Omni180 min

GeckoNot on record

Adhesion

2SNot on record

Winbot W2 Pro Omni5,500 Pa

GeckoNot on record

Noise

2S64 dB

Winbot W2 Pro Omni63 dB

Gecko68 dB

Navigation

2SEdge-Leakage Sensor: pneumatic edge detection at the window seal and on frameless glass, with a preprogrammed zigzag route, horizontal then vertical; no mapping or vision-based navigation

Winbot W2 Pro OmniWIN-SLAM 4.0 path planning + triple-nozzle wide-angle spray

GeckoEdge sensors for frame detection; two rotating cleaning discs drive movement. No mapping, gyroscope or stabilization hardware documented.

Connectivity

2SNot on record

Winbot W2 Pro OmniWi-Fi, Bluetooth, Alexa, Google Home

GeckoBluetooth

Size

2S9.45 × 9.45 × 3.39 in

Winbot W2 Pro Omni10.7 × 10.7 × 3 in

Gecko8.2 × 6.1 × 3.5 in

The same on all three

Battery type

2SLi-Po

Winbot W2 Pro OmniLi-Po

GeckoLi-Po

Add a robot24 robot window cleaners on record + Add a robot24 robot window cleaners on record

Some links earn Robovations a commission. Nothing on this page is ranked by it.

Safety at height

What each one offers if the glass or the power fails

Two makers print a rope rating: 331 lb for the 2S and 220 lb for the W2 Pro Omni. The Gecko has a rope but no rating was found. The 2S page gives a 20-minute power-cut hold and the W2 Pro Omni 30 minutes. None was found for the Gecko.

HOBOT2S

EcovacsWinbot W2 Pro Omni

GladwellGecko

1Safety rope ratingLoad it is rated to catch

331lb

Printed in metric as 150 kgf.

HOBOT US product page

Winbot W2 Pro Omni

220lb

Main rope rated 220 lb (100 kg), plus a 39 in (1 m) backup rope.

Ecovacs US product page

Gecko

Not found

Two write-ups say a rope is included. No rating found on any page opened.

Searched review pages; no maker page found

2Hold on a power cutMinutes it stays on the glass

20min

The page lists 20 mins of battery runtime on a mains-powered unit.

HOBOT US product page

Winbot W2 Pro Omni

30min

Listed as power-off protection time on a full charge.

Ecovacs US product page

Gecko

Not found

A review mentions a backup battery without a hold time.

Hands-on review

3Edge and fall sensingWhat the page says it detects

2SEdge-leak sensors

The page lists Edge-Leakage Sensors for vertical surface detection.

HOBOT US product page

Winbot W2 Pro OmniOptical edge sensor

Optocoupler sensor with a 0.2 second response, plus a gravity sensor for stability.

Ecovacs US product page

GeckoEdge detection

A review mentions AI-powered edge detection. No sensor detail found.

Hands-on review

4Weight on the glassThe robot alone

2.9lb

The page prints 1300g (2.9 lb).

HOBOT US product page

Winbot W2 Pro Omni

3.5lb

Maker product page, as held in our record

Gecko

4.97lb

A review states this weight. No maker figure found.

Hands-on review

5Smallest paneMinimum size the maker lists

over 15.7 x 15.7in

Printed as over 40×40 cm.

HOBOT US product page

Winbot W2 Pro Omni

11.8 x 15.7in

Ecovacs US product page

Gecko

Not found

No minimum found in the review pages opened.

Searched review pages

Same on all three: each comes with a safety rope, according to its maker page or review.

Inside the room: the window-cleaning robot's mains plug lies pulled out on the window board in front of a power strip, while through the glass the robot still holds on to the outside of the pane, its gold safety rope tied to an eye bolt in the window reveal, with treetops and roofs below.

Your home

How each one fits a home like yours

Set the conditions that describe your home. Each robot answers from its own Fit Check; nothing is scored until you choose.

Fit check

Describe your home

Pick what applies. Each robot answers from its own record.

Window style

Frame style

Building height

Across what you setEach robot’s own Fit Check

2SSet a condition

Winbot W2 Pro OmniSet a condition

GeckoSet a condition

Window styleNot set

2SNot set

Winbot W2 Pro OmniNot set

GeckoNot set

Frame styleNot set

2SNot set

Winbot W2 Pro OmniNot set

GeckoNot set

Building heightNot set

2SNot set

Winbot W2 Pro OmniNot set

GeckoNot set

Everything else

Where they land among 27 robot window cleaners

Only the measures on which these three differ. The bar is the whole category; the block is the typical middle half; the tick is the median.

WeightRobot alone, record figure

2.9 lb

Winbot W2 Pro Omni

3.5 lb

Gecko

4.8 lb

2typical 2.8–4 · median 3.44.8

ThicknessRecord figure

3.4 in

Winbot W2 Pro Omni

3 in

Gecko

3.5 in

2.2typical 3–3.5 · median 3.19.4

Sources

Where every figure comes from

HOBOT 2S · hobot.us product page, read 2 Oct 2026
Winbot W2 Pro Omni · Ecovacs US product page
Gecko · No maker page opened. smartvacguide.com review; innovationessence.com promotional article (Apr 2022)

Figures were read from the maker's own page on 2 Oct 2026. The Gecko had no maker page we could open, so it rests on two write-ups. Not found means the pages we could open say nothing on that point.

Questions

What readers ask

Does each robot print a rope rating?

The 2S page prints 331 lb (150 kgf) and the W2 Pro Omni page 220 lb (100 kg). A rope is mentioned for the Gecko, but no rating was found.

How long does each hold on the glass in a power cut?

The 2S page lists 20 mins of battery runtime. The W2 Pro Omni page lists 30 minutes of power-off protection. The Gecko review names a backup battery without a time.

Does each robot carry a backup rope?

The W2 Pro Omni lists a main rope rated 220 lb plus a 39 in (1 m) backup rope. The pages read for the 2S and the Gecko do not mention one.

Common questions

What readers ask about this comparison.

Next up

Are robot window cleaners worth it for just a few windows?

Read the comparison

Comparison ID: RV–CMP–1914 · Last reviewed Jun 1, 2026 · Based on owner reports, manufacturer documentation, and firmware release notes

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