ECOVACS WINBOT W2S PRO vs W2S PRO Omni

W2S PRO 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. Where your outlets are matters more than any single row.

Same robot, different power

Start with what they share, because it is almost everything that touches the glass. Both robots are rated at 10,000 Pa✕Pa, or pascalsThe unit for suction. A higher number means the robot presses itself to the glass harder, which matters most on high and outside windows. of suction, the highest of any Winbot I tested.

Both use four detachable TruEdge 2.0✕TruEdge 2.0ECOVACS’ second-generation edge system: four felt brushes at the corners of the robot that sweep into frames and corners, with sensors that detect the edge on two axes. brushes, triple nozzles on each side and WIN-SLAM 4.0 navigation, which measures the window and then plans a back-and-forth route.

The difference is how they get power. The W2S PRO runs on a mains cord, with a backup battery that holds suction for about 30 minutes if the power is cut. The W2S PRO Omni runs from a portable station rated for up to 110 minutes, or plugged in.

Our tip: Walk around your home and check which windows have an outlet within reach before you choose, because that answer decides this comparison.

Design, station and storage

On the glass, the two robots are the same square body, heavier than the compact Winbots. Both carry a visible 4.1 oz tank, so I could see when to top up before a big pane.

The W2S PRO comes as a robot, a power supply, a safety rope with a carabiner, two pads and a starter bottle of solution. With no station, I kept everything in a box and spent the first week finding a tidy way to store it.

The W2S PRO Omni puts everything in one station: robot, solution, a cable that retracts at one button, a suction cup for the floor and a tether lock. Its small display shows battery and task without the phone, which I used far more than I expected. The trade-off is weight, and carrying it upstairs was tiring.

The corded W2S PRO is the same robot without the station.

Setup and the first week

Both took about 15 minutes the first time, mostly the ECOVACS HOME app, Bluetooth pairing and a firmware update.

After that, the W2S PRO took about 3 minutes to prepare and 2 to pack away, because I had to route the cord and rope each time. The W2S PRO Omni took about 2 minutes, because the station holds everything and the cable reels itself in.

My first-week scores were 7.6 for the W2S PRO and 7.8 for the Omni. The corded robot lost points for cable fiddling on the very first sliding door.

Our tip: Before the first run on the W2S PRO, check that the cord reaches the far top corner with slack to spare, because the robot simply stops short when it runs out.

Suction and safety

Both robots grip the glass with the same 10,000 Pa, and neither came off in four weeks. The safety scores still differ: 9.4 for the Omni and 8.8 for the corded W2S PRO.

The reason is the anchor. The W2S PRO’s rope clips to whatever you tie it to, so your choice of anchor is the safety system, and I had to resist tying it to a curtain rod or a light chair. The Omni’s tether locks to a weighted station with a suction cup.

Both hold on when power is lost. The W2S PRO kept its fan running on backup for about 30 minutes when I unplugged it mid-run, and the Omni holds for 30 minutes or more, returns to its start and alerts you.

My safety scores

Scores out of 10 for grip, alerts and anchoring.

For outside upstairs glass, either robot is safer than a ladder. The U.S. Consumer Product Safety Commission has reported more than 164,000 emergency room-treated injuries a year related to ladders.

How well they clean

With the same robot underneath, cleaning results were nearly identical. Both scored 9.4 on dust and pollen, 9.2 on fingerprints and pet marks, 8.6 on water spots and 8.0 on months of outside grime.

That is as close to a tie as I have recorded. The small differences I saw came from how I used them, not from the robots.

On the Omni, I also tested soap film on a shower door, which scored 7.8 once I had descaled the limescale by hand first.

Cleaning scores

My overall cleaning scores out of 10.

Our tip: Use Thorough plus a quick Edge pass on sliders and big panes, because that combination gave me the best results on both robots.

Edges and corners

TruEdge 2.0 is the reason to buy either of these robots. Its four felt brushes reached further into frames and corners than any flat-pad robot I tested.

In the center of the glass, both scored 9.6. Along the frames, the Omni scored 9.2 and the W2S PRO 9.0. In the inside corners, it was 8.4 against 8.2.

The Omni also scored 8.8 on frameless edges, where its dual-axis edge detection turned the robot cleanly before the edge. On both, the brushes turned gray quickly on outside glass and needed washing every few sessions.

Inside corners

My scores out of 10.

TruEdge 2.0 brushes reach into frames and corners on both robots.

Our tip: Wash the four edge brushes every few sessions, because gray brushes leave faint lines along exactly the frames they are meant to clean.

Cord vs battery station: living with each

This is the real comparison. On the corded W2S PRO, every window starts with a question: is there an outlet within reach, and where will the cord and rope run?

On inside glass near a socket, that took seconds. On the outside of patio doors, I routed the cord through a door gap and kept the cord and rope on opposite sides so they did not tangle and pull the robot off its route.

On the W2S PRO Omni, none of that mattered. I set the station on the floor, locked the tether and let it run for up to 110 minutes, including on a glass balcony with no outlet in sight.

Ease of use

My scores out of 10, mostly reflecting cord and storage.

Our tip: Keep the W2S PRO’s power cord and safety rope on opposite sides of the window, because crossed lines were the number one cause of the robot drifting off its route.

Modes and controls

Here the corded W2S PRO has an edge. It offers seven modes: Fast, Thorough, Deep, Heavy-Duty, Edge, Spot and Zone, plus a joystick in the app to steer the robot by hand.

The W2S PRO Omni has six: Fast, Thorough, Deep, Heavy-Duty, Edge and Zone. You can set the mode on the station display before attaching the robot, which I preferred to opening the app.

The joystick surprised me on the W2S PRO. I used it to nudge the robot onto a bird-dropping spot I had pre-cleaned and run Spot over it.

W2S PRO: relative time per window

Relative timings from my sessions. ECOVACS rates the robot at about 5.5 inches per second.

Spray, tank and pads

Both robots spray from triple nozzles on each side and hold 4.1 oz of solution in a visible tank. ECOVACS rates one fill for up to 807 sq ft on the Omni.

Pads made the biggest difference to results. On the W2S PRO, a fresh, damp pad scored 9.0, the same pad after three inside windows 8.0 and after two dirty outside windows only 5.8.

I swapped to the spare pad before the last few windows of every session on both robots. Neither station nor robot washes its own pads, so both ended at the sink.

W2S PRO: pad condition on the same window

My scores out of 10.

The solution matters too. I used ECOVACS’ own, because household cleaners can foam or leave a film that clogs fine nozzles.

Hard water is the other enemy. The U.S. Geological Survey classes water above 120 mg/L of calcium carbonate as hard, and those minerals are what dry into spots on glass.

Our tip: Swap to a fresh pad after two dirty outside windows, because my scores dropped from 9.0 to 5.8 on a pad carried that far.

Which windows and glass suit each

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

The W2S PRO Omni was the more versatile in practice. It was excellent on frameless glass, very good on mirrors and glass railings, and good on shower doors after descaling, mostly because I could take it anywhere.

The W2S PRO was at its best on big windows and sliders near outlets, and for anyone who notices dirty frame lines.

Noise, pets and family life

With the same fan, both robots sound the same. I measured the Omni at about 66 to 68 dB, which sits between normal conversation at about 60 dB and a vacuum at 75 to 80 dB.

It is a steady whoosh, roughly like a hair dryer on low. You hear it in the same room, and it fades one room away.

With pets and children, the corded W2S PRO has two lines to manage, the cord and the rope. The Omni has one, the tether, which I kept away from paws and small hands.

How loud is it?

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

A whole-house cleaning day with each

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

With the W2S PRO, the whole day took about 40 minutes of my own time. Much of that was routing the cord, tying the rope to something solid and moving both between windows.

With the W2S PRO Omni, my hands-on time on the ground floor was about 15 minutes over about 70 minutes of robot time: about 3 minutes of prep, 6 minutes moving and 4 minutes rinsing pads. One street-facing window needed a second Heavy-Duty pass.

Cleaning and maintaining them

Upkeep is the same robot routine on both: rinse the pads, wash the edge brushes every few sessions, and wipe the sensors and bumpers after outside glass.

The W2S PRO adds cord care. I coiled it loosely and checked it for kinks, and stored the robot, rope and pads together so nothing went missing.

The Omni adds station care. I kept it charged, wiped the suction cup and checked the tether for fraying before high windows.

Our tip: Wipe the sensors and bumpers after every outside session, because grit on the edge sensors made both robots hesitate at frames.

Mistakes to avoid

The robot habits are shared, but the corded W2S PRO has a few traps of its own.

My four weeks, week by week

Week one: inside glass and every mode. The W2S PRO scored 7.6 and the Omni 7.8, with the corded robot losing points for cable fiddling.

Week two: outside and high windows. The W2S PRO reached 8.3 once I routed the cord through a door gap, and the Omni 8.6 once I learned to anchor the station.

Week three: the W2S PRO hit 8.6 as I explored the joystick, Spot and Zone. The Omni reached 8.8 on a shower door and glass railing.

Week four: routine use. The W2S PRO finished at 8.8 and the Omni 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.

The station display shows battery and task without the app.

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 the station makes the same excellent robot easier and safer to use anywhere. The W2S PRO cleans just as well where there is an outlet nearby.

Which one should you buy?

Start with where your outlets are.

If most of your glass is near sockets, the W2S PRO gives you the same robot and corners for less. If you have balconies, big glass far from outlets or high outside windows, the W2S PRO Omni is the better buy.

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

Living with them long term

Both need pads rinsed, edge brushes washed every few sessions and the rope or tether checked. The W2S PRO adds cord care, and the Omni a charged station.

What I would change: a longer cord or a carry bag for the W2S PRO, and a lighter station and pad washing for the Omni.

For windows near outlets, the W2S PRO is the same robot for less.

W2S PRO 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, a glass balcony, mirrors, a shower door 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, unplugged the W2S PRO mid-run to test its backup, 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.