ECOVACS WINBOT W2S Omni vs W2S PRO Omni

W2S Omni vs W2S PRO Omni at a glance

Head to head

The best result in each row is marked, based on my testing and the manufacturer specs. Where the robots tie, both are marked.

The tally is a guide, not my verdict. How much you notice frame lines and how high your windows are matters more than any single row.

What PRO actually adds

The names make these two sound like one product with a sticker. They are closer to two generations of edge cleaning on the same station idea.

The W2S Omni uses a single spinning TruEdge✕TruEdgeA small rotating scrubber at the robot’s edge that reaches into the strip along frames and corners, where a flat pad leaves a dirty line. scrubber, rated at up to 200 RPM, and 8,000 Pa of suction.

The W2S PRO Omni swaps that for four detachable felt brushes called TruEdge 2.0✕TruEdge 2.0Four felt edge brushes, one at each corner of the robot, with sensors that detect edges on two axes so the robot can sweep right up to frames and frameless edges., raises suction to 10,000 Pa✕Pa, or pascalsThe unit for suction. Higher numbers mean the robot presses itself to the glass harder. and adds a display to the station.

Our tip: If you mostly look at the middle of the glass, the W2S Omni is enough, so only pay for PRO if frame lines and corners actually bother you.

Design and stations

On the glass, the robots look nearly identical: square, flat and a little heavier than the compact Winbots. The PRO’s four edge brushes are the giveaway when you turn it over.

Both stations are heavy, and both carried me through the same room-by-room routine. The W2S Omni station is a 6-in-1 box that stores the robot, holds solution, charges and anchors the tether.

The W2S PRO Omni’s station adds a small display that shows battery and task, a cable that retracts at one button and a tether lock. I set the mode on that display before attaching the robot, which I came to prefer over opening the app.

The W2S Omni’s 6-in-1 station stores, charges and anchors the robot.

Setup and the first week

Both took about 15 minutes out of the box, most of it on the ECOVACS HOME app and a firmware update. After that, the W2S Omni took about 3 minutes per session to start and 1 to 2 to pack away, and the PRO about 2 minutes.

Week one went to the PRO, 7.8 against 7.4. Inside windows and a bathroom mirror were easy on both, but the display let me check battery and mode at a glance.

On the W2S Omni I learned to wait for the "attached" voice prompt before letting go. On the PRO I learned to set the mode before attaching.

Suction and safety

Neither robot ever came off the glass. The PRO still earned the highest safety score I have given a window robot, 9.4, against 9.0 for the W2S Omni.

Part of that is suction: 10,000 Pa felt noticeably more planted on a breezy glass balcony. Part of it is the anchor: the PRO’s tether locks to the station, which grips the floor with a suction cup.

Both hold on for at least 30 minutes on low battery, return to the start and alert you with a voice prompt. That is a far safer way to clean upstairs outside glass than a ladder, which the U.S. Consumer Product Safety Commission links to more than 164,000 emergency room-treated injuries a year.

My safety scores

Scores out of 10 for grip, alerts and anchoring.

How well they clean

On the open glass, these two are almost a tie. Dust and pollen scored 9.2 on the W2S Omni and 9.4 on the PRO, and fingerprints 9.0 against 9.2.

Water spots and rain marks were level at 8.6, and both scored 8.0 on months of outside grime in a single Heavy-Duty pass.

The PRO also scored 7.8 on soap film on a shower door, once I had descaled the limescale by hand. I did not test the W2S Omni on shower glass.

Outside glass on the W2S Omni, Heavy-Duty

My scores out of 10 with a fresh pad.

Our tip: Start dirty outside glass on Heavy-Duty on either robot, because Fast mode on neglected glass left a faint haze every time.

Edges and corners: the real gap

This is where PRO earns its name. In the center of the glass both scored around 9.5, but at the edges the four TruEdge 2.0 brushes pulled clearly ahead.

Along the frames, the PRO scored 9.2 and the W2S Omni 8.6. In the inside corners, it was 8.4 against 7.6, which on a sunny day was the difference between a clean corner and a small dull triangle.

The PRO also scored 8.8 on frameless edges, sweeping right to the edge before its sensors turned it.

Inside corners

My scores out of 10.

Along frames

Same windows, same week.

Four TruEdge 2.0 brushes gave the PRO the cleanest corners.

There is a cost. The PRO’s felt brushes turned gray quickly on outside glass, and dirty brushes leave faint lines along exactly the frames they are meant to clean. I washed them every few sessions.

Spray, tank and pads

Both robots spray from triple nozzles on both sides, so they wet the glass whichever way they travel. The PRO’s spray covered about 90% of its spray zone in my notes.

The tanks differ. The W2S Omni holds about 80 ml, while the PRO holds 4.1 oz in a visible tank, which ECOVACS rates for up to 807 sq ft per fill. Being able to see the level before a big pane was handy.

On both, the pad decided more than the spray. On the W2S Omni, a damp, well wrung-out pad scored 9.0, a soaking-wet pad 6.2, a pad from a dirty window 5.5 and a dry pad 4.8.

Tank size

Manufacturer capacities.

W2S Omni: same window, different pad

My scores out of 10.

Our tip: Use two pads and swap halfway through a big session on either robot, because a pad carried from a dirty window spreads the grime around.

Modes and controls

The W2S Omni offers Fast, Thorough, Deep, Heavy-Duty and Edge, plus remote control from the app. The PRO adds Zone, which cleans a small patch, handy for a smudge at handle height on a big door.

The bigger difference is where you set them. On the W2S Omni, you use the app. On the PRO, you can choose the mode on the station display before attaching the robot.

That small convenience is a big part of why the PRO scored 8.8 for ease of use against 8.6.

Robot, ladder or cleaning by hand?

Both of these robots changed how often I cleaned windows. Instead of a twice-a-year ladder job on the outside glass, I cleaned it from inside every few weeks.

By hand, a room of windows took me about 20 minutes of wiping and buffing. With either robot, my hands-on time per session was a few minutes of setup and about 4 minutes of rinsing pads at the sink.

By hand, I was faster on the first door. By the third door, the robots were still cleaning just as well, and I was not.

Hands-on cleanup per session

My own timings.

The bigger win is outside glass on upper floors. Both robots clean it from inside the room, with the tether locked to the station on the floor.

Where it rains often, regular light cleaning also beats occasional heavy cleaning. Dust and pollen scored 9.2 to 9.4 on both robots, while months of grime scored 8.0, so little and often gives the best-looking glass.

Our tip: Clean outside glass on an overcast morning, because hot direct sun dries the mist before the pad reaches it and leaves streaks on both robots.

Battery and power

Both stations are rated for about 110 minutes, and both can run plugged in with no time limit. ECOVACS rates the W2S Omni for up to about 65 m² in Fast mode.

On the PRO, a ground-floor session took about 70 minutes of robot time with about 15 minutes of my own: about 3 minutes of prep, 6 of moving and 4 of rinsing. The battery covered it with charge left.

When the battery runs low, both return to the starting point and hold on for at least 30 minutes with an alert.

PRO ground-floor session: my time

About 15 minutes of my time over about 70 minutes of robot time.

Our tip: Charge the station the night before a big window day, because both robots run best when you can do a whole floor without stopping.

Which windows and glass suit each

Both were excellent on sliding doors and large windows, and both were fair on arched or oddly shaped glass.

The PRO was the more versatile. It was excellent on frameless glass, very good on mirrors and glass railings, and good on shower doors after descaling.

The W2S Omni was very good on upper-floor outside glass and on a glass office partition with small joins, and good on small rectangular windows.

Our tip: Descale shower glass by hand before the first run, because neither robot removes limescale on its own.

Noise, pets and family life

I measured the PRO at about 66 to 68 dB, between normal conversation at about 60 dB and a vacuum at 75 to 80 dB. The W2S Omni sounded the same to my ear, roughly like a hair dryer on low.

Both are clearly audible in the same room and fade one room away.

With pets and children, keep the tether away from paws and small hands. I ran it along the wall on both.

How loud is it?

My reading for the PRO; others are typical reference levels.

A whole-house cleaning day with each

In week four, I gave each robot the ground floor inside and out, the balcony and the upstairs windows I can reach.

With the W2S Omni, I batched windows room by room to limit stair trips with the heavy station, swapped to a spare pad halfway and ran Edge as a finishing pass on the sliding doors.

With the W2S PRO Omni, the routine was the same, but I set each mode on the display, needed one second Heavy-Duty pass on the dirtiest street-facing window and washed the edge brushes at the end.

Cleaning and maintaining them

Both robots need pads rinsed by hand after each session, sensors and underside wiped after outside glass and the tether checked for fraying before high windows.

The PRO adds its four edge brushes. They detach easily, and I washed them every few sessions, more often after outside glass.

The W2S Omni’s single scrubber only needed a wipe. That is the one area where the W2S Omni is easier to own.

Our tip: Wash the PRO’s edge brushes every few sessions, because gray brushes leave faint lines along the frames.

Mistakes to avoid

Most weak results I had came from habits that apply to both robots.

Water quality is worth a thought too. The U.S. Geological Survey classes water above 120 mg/L of calcium carbonate as hard, and those minerals dry into spots and slowly clog fine nozzles.

My four weeks, week by week

Week one: inside windows and a mirror. The W2S Omni scored 7.4 and the PRO 7.8.

Week two: outside and high windows. The W2S Omni reached 8.4 with Heavy-Duty, and the PRO 8.6 once I had the station anchoring down.

Week three: odd glass. The W2S Omni hit 8.7 on a partition and small windows, and the PRO 8.8 on a shower door and glass railing.

Week four: routine. The W2S Omni finished at 8.9 and the PRO at 9.1.

Week four satisfaction

My weekly scores out of 10.

Real-life scenarios

These are the moments during testing where one robot clearly pulled ahead.

On big, regularly cleaned glass, the W2S Omni is still excellent.

My scorecard

These are my own scores out of 10, from my single reviews of each robot after four weeks of daily use.

Overall scores

My overall editorial scores out of 10.

The W2S PRO Omni wins because it cleans deeper into corners and frames and holds on harder, with a more convenient station. The W2S Omni matches it on open glass with a little less upkeep.

Which one should you buy?

Start with the corners.

If the dull triangles in the corners and lines along the frames bother you, or you clean high and frameless glass, buy the W2S PRO Omni. If you mostly care about the open glass and want less upkeep, the W2S Omni is a great all-rounder.

For everything I found, see my W2S Omni review and W2S PRO Omni review, or my comparison of all four Winbot station robots.

Living with them long term

Both need pads rinsed after every session and the tether checked. The PRO adds edge-brush washing every few sessions.

What I would change: pad washing in both stations, lighter stations and brushes on the PRO that stay clean longer.

For the cleanest corners, the W2S PRO Omni is the one to get.

W2S Omni vs W2S PRO Omni specifications

From manufacturer specifications and my own testing.

How I tested and compared them

I used each robot as my main window cleaner for four weeks, on inside windows, sliding doors, balcony glass, mirrors, a shower door, a glass partition and neglected street-side windows. A second HouseholdMe tester shared the robots, and we wrote the notes together.

I scored both on the same windows with the same solution, and timed every setup, session and cleanup.

I then checked my notes against ECOVACS’ specifications and owner documentation.

• Cleaning: dust, fingerprints, rain spots and months of outside grime.
• Edges: frames, inside corners and frameless edges.
• Safety: suction hold, power-loss behavior and the safety rope.
• Ownership: setup, pads, refills, storage and noise.