Can any of these units move between windows on their own?

No. Each record states the robot is placed on each pane by hand: the Ecovacs Winbot W2 Omni does not travel between windows, the HOBOT 388 Ultrasonic is carried to each window with its safety rope re-anchored, and the Mamibot iGLASSBOT W120-T is remounted with its rope re-anchored between panels.

Is the Mamibot W120-T compatible with frosted or textured glass?

Not reliably, by its record. Owner reports document suction loss on textured, frosted and curved glass with the Mamibot iGLASSBOT W120-T, and Mamibot's manual separately prohibits frameless glass outright. Owner reports describe the HOBOT 388 Ultrasonic detaching on patterned or divided glass, and the Ecovacs Winbot W2 Omni's record notes Ecovacs makes no claim for heavily textured surfaces.

What makes the HOBOT 388 different from a pad-based cleaner?

The HOBOT 388 Ultrasonic lays water on the glass as a 15-micrometer ultrasonic mist ahead of its two microfiber pads, rather than running water onto the glass, which its record says keeps run-off off the sill. It still uses washable pads, laundered after every use. By comparison, the Mamibot iGLASSBOT W120-T's pads are wetted by hand before each mounting, and the Ecovacs Winbot W2 Omni's record mentions automatic spraying set in the app.

Does the W2 Omni's Omni dock eliminate all owner maintenance?

No. The Ecovacs Winbot W2 Omni's station charges the robot, takes up the cable automatically, stores the unit and serves as the fall-protection anchor, so there is no tether for the owner to tie. The pads are still washed and dried by hand, the edge sensor and suction inlet are wiped by hand, and the robot is lifted onto and off each pane by hand.

Does app connectivity affect these window robots' autonomy levels?

App connectivity does not set the classification; documented behavior does. The Ecovacs Winbot W2 Omni is Level III, and the HOBOT 388 Ultrasonic and Mamibot iGLASSBOT W120-T are Level II. Each record names the same limit: the robot is placed on each pane by hand and does not travel between windows. The Mamibot is controlled by an RF remote rather than an app.

Comparisons · Robot Window Cleaners3 robots · checked 16 Oct 2026

A situation

Robotic window cleaners: which design fits which window?

These window cleaners differ in how they clean, what glass they accept and how much cord and kit comes with them. This page lays out those differences pane by pane.

This page checks

Cleaning methodSpray, mist or wetted pads
Frameless glassWhether the page says it is supported
Weight and cordRobot alone, and how far it reaches
Smallest paneThe minimum size the maker lists

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

HOBOT

388 Ultrasonic

IIAssistedStrong

$299list

Where to buy

Amazon

Sep 2023HOBOT 388 app firmware addresses 5 GHz Wi-Fi dropout in owner reports

Mamibot

iGLASSBOT W120-T

IIAssistedLimited

$179list

Where to buy

Amazon

Maker's US page found but lists no specifications

Mar 2024W120-T edge-detection false stops documented across Amazon owner reviews

Full specifications16 figures on record · 13 differ

Figure

Winbot W2 Pro Omni

388 Ultrasonic

iGLASSBOT W120-T

List price

Winbot W2 Pro Omni$499.99

388 Ultrasonic$299

iGLASSBOT W120-T$179

Released

Winbot W2 Pro OmniOct 2024

388 UltrasonicNov 2021

iGLASSBOT W120-TSep 2022

Power

Winbot W2 Pro OmniBattery or mains-plugged operation

388 UltrasonicMains-corded, 5 m cord

iGLASSBOT W120-TMains-corded with backup battery

Backup hold

Winbot W2 Pro Omni30 min

388 Ultrasonic20 min

iGLASSBOT W120-T20 min

Smallest pane

Winbot W2 Pro Omni11.8 in

388 Ultrasonic13 in

iGLASSBOT W120-T39.4 in

Safety rope

Winbot W2 Pro Omni220 lb

388 Ultrasonic441 lb

iGLASSBOT W120-TNot on record

Cleaning width

Winbot W2 Pro Omni10.2 in

388 UltrasonicNot on record

iGLASSBOT W120-TNot on record

Weight

Winbot W2 Pro Omni3.5 lb

388 Ultrasonic2.02 lb

iGLASSBOT W120-T2.98 lb

Runtime

Winbot W2 Pro Omni110 min

388 UltrasonicNot on record

iGLASSBOT W120-TNot on record

Charge time

Winbot W2 Pro Omni180 min

388 UltrasonicNot on record

iGLASSBOT W120-T60 min

Battery type

Winbot W2 Pro OmniLi-Po

388 UltrasonicNot on record

iGLASSBOT W120-TNot on record

Adhesion

Winbot W2 Pro Omni5,500 Pa

388 UltrasonicNot on record

iGLASSBOT W120-T2,800 Pa

Noise

Winbot W2 Pro Omni63 dB

388 UltrasonicNot on record

iGLASSBOT W120-T65 dB

Navigation

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

388 UltrasonicSystematic path algorithm with edge detection; no LiDAR or camera mapping

iGLASSBOT W120-TStrip-pattern auto-path with edge-detection sensors; RF remote manual mode.

Connectivity

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

388 UltrasonicWi-Fi, Bluetooth

iGLASSBOT W120-TBluetooth

Size

Winbot W2 Pro Omni10.7 × 10.7 × 3 in

388 Ultrasonic5.83 × 11.6 × 3.74 in

iGLASSBOT W120-T9.8 × 9.8 × 3.9 in

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.

Design and glass

How each one cleans and which windows it accepts

Only the Winbot W2 Pro Omni page lists frameless windows as supported, starting at least 3.9 in from the edge. Evidence on the HOBOT 388 is mixed. For the Mamibot W120-T, the pages we could open gave no figures at all.

EcovacsWinbot W2 Pro Omni

HOBOT388 Ultrasonic

MamibotiGLASSBOT W120-T

1How it cleansWater and pad method

Winbot W2 Pro Omni

Auto spray nozzles, hand-wetted pad

Tank-fed spray nozzles wet the glass. The microfiber wiping pad is wetted by hand before each run, then wipes.

Maker user manual

388 UltrasonicUltrasonic mist

Ultrasonic water spray with microfiber cleaning wheels.

HOBOT product page

iGLASSBOT W120-T

Not found

Maker's US page lists no method; the manual PDF could not be read.

Searched Mamibot US page

2Frameless glassDoes the page say it works

Winbot W2 Pro OmniFrameless and framed

Spec lists framed and frameless glass. On frameless glass, start at least 10 cm (3.9 in) from the edge.

Maker product page

388 UltrasonicMixed evidence

A hands-on review says it keeps away from frameless edges. A trade article says it is not designed for them.

Hands-on review and trade article

iGLASSBOT W120-T

Not found

Search results disagree and no page we could open settled it.

Searched Mamibot US page

3Weight on the glassThe robot alone

Winbot W2 Pro Omni

3.5lb

Maker product page, as held in our record

388 Ultrasonic

2lb

A hands-on review gives 915 g (2 lb). Maker page lists no weight.

Hands-on review

iGLASSBOT W120-T

Not found

Maker's US page lists no weight; manual PDF could not be read.

Searched Mamibot US page

4Cord reachMains cord length

Winbot W2 Pro Omni

18ft (5.5 m)

One cable carries power and the safety rope, joined to the station.

Ecovacs US product page

388 Ultrasonic

16ft (5 m)

The page also lists a 20 minute UPS backup.

HOBOT product page

iGLASSBOT W120-T

Not found

No cord length on the pages we could open.

Searched Mamibot US page

5Smallest paneMinimum size the maker lists

Winbot W2 Pro Omni

11.8 x 15.7in

Ecovacs US product page

388 Ultrasonic

Not found

The maker's page lists no minimum.

HOBOT product page

iGLASSBOT W120-T

Not found

Maker's US page lists no minimum; manual PDF could not be read.

Searched Mamibot US page

Same on all three: no figure was identical across all three, so each fact has its own row.

On the floor under the window, a Winbot W2 Pro Omni stands docked in its white station while a HOBOT 388 lies pad-down on the boards beside it, its mains cord in a loose coil and running on to a wall socket.

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

Winbot W2 Pro OmniSet a condition

388 UltrasonicSet a condition

iGLASSBOT W120-TSet a condition

Window styleNot set

Winbot W2 Pro OmniNot set

388 UltrasonicNot set

iGLASSBOT W120-TNot set

Frame styleNot set

Winbot W2 Pro OmniNot set

388 UltrasonicNot set

iGLASSBOT W120-TNot set

Building heightNot set

Winbot W2 Pro OmniNot set

388 UltrasonicNot set

iGLASSBOT W120-TNot 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

Winbot W2 Pro Omni

3.5 lb

388 Ultrasonic

2 lb

iGLASSBOT W120-T

3 lb

2typical 2.8–4 · median 3.44.8

ThicknessRecord figure

Winbot W2 Pro Omni

3 in

388 Ultrasonic

3.7 in

iGLASSBOT W120-T

3.9 in

2.2typical 3–3.5 · median 3.19.4

Sources

Where every figure comes from

Winbot W2 Pro Omni · Ecovacs US product page and user manual
HOBOT 388 · hobot.us product page; gadgetguy.com.au hands-on review; restechtoday.com trade article
Mamibot W120-T · mamibotusa.com product page (no specifications shown); manual PDFs could not be read

Figures were read from pages opened on 2 Oct 2026. Not found means the pages we could open say nothing on that point. The record's Mamibot figures were not confirmed.

Questions

What readers ask

Does the page for each robot say frameless glass works?

The Winbot W2 Pro Omni spec lists framed and frameless glass. For the HOBOT 388, a review and a trade article disagree. Nothing was confirmed for the Mamibot W120-T.

How long is each cord?

The W2 Pro Omni lists 18 ft (5.5 m) and the HOBOT 388 page lists 16 ft (5 m). No cord length was found for the Mamibot.

How does each robot wet the glass?

The W2 Pro Omni uses tank-fed spray nozzles and a pad wetted by hand. The HOBOT 388 uses ultrasonic water spray with microfiber wheels. No method was found for the Mamibot.

Common questions

What readers ask about this comparison.

Next up

What happens when a robot window cleaner loses suction or power?

Read the comparison

Comparison ID: RV–CMP–6563 · Last reviewed Jun 18, 2026 · Based on owner reports, manufacturer documentation, and firmware release notes

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