eufy Omni S2 Review: A Superb Roller Mop and Clog-Free Suction, With Software Still Catching Up
The eufy Omni S2 is a premium robot vacuum and mop whose hardware wins most owners over: 30,000 Pa suction that stays strong because the bin does not clog, a roller mop that lifts muddy and sticky marks other robot mops leave behind, and obstacle avoidance that steers around cords, toys and pet dishes. The dock empties the bin, washes and dries the mop and doses detergent on its own. The trade-offs are software that can get lost on complex floor plans, a 98 mm body that will not fit under some furniture, a very large dock and a handful of units that threw repeated errors. It suits large, mostly open homes that want top-tier mopping and can absorb the price.
- Pet owners
- Mixed hard floors and rugs
- Large, open floor plans
- Multi-platform smart homes
Pros
- Roller mop lifts stuck-on dirt better than typical pad mops
- Strong 30,000 Pa suction that does not fade as the bin fills
- Excellent obstacle avoidance for cords, toys and pet dishes
- Dock empties, washes and dries the mop and doses detergent
- Quiet while cleaning, rated at 59 dB
- Works with Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter
- Two year warranty
Cons
- 98 mm body does not fit under some low furniture
- Very large dock that needs space around it
- Navigation and app can struggle on complex layouts
- Some units report repeated errors
- 2.4 GHz Wi-Fi only
- Premium price
Who is the eufy Omni S2 for?
It suits a household that wants the mop to do real work, not just dampen the floor, and has room for a big dock. Owners with dogs and cats, shoes worn indoors or tile, laminate and rugs in the same home describe it as their daily cleaner, and one covers a 2,500 square foot single-storey house on a charge. Homes with complex layouts, ramps or low sofas are a weaker match, as is anyone who wants a robot that simply never needs attention.
What buyers love
Mopping draws the strongest praise: owners say the roller mop removes ingrained mud and sticky patches better than any robot mop they have used, and moves between hard floors and rugs without fuss. Suction is the other headline, and one owner comparing it side by side with a rival flagship notes that its bin keeps airflow up after a week of nightly runs instead of caking the filter. Obstacle avoidance is rated among the best in the class, marking shoes, cords and even a paper plate on the map and going around them. Buyers also mention a premium build, quiet running outside the self-emptying cycle, a tall dock that makes the water tanks easy to fill and empty, a status display on the dock, and detergent that the dock dispenses on its own.
What to know before you buy
The robot is 98 mm tall, and two owners found it would not go under furniture that slimmer robots reach. The dock measures 476 x 387 x 670 mm, and one owner found it needs clear space on both sides to dock reliably. Software is the recurring weak spot: some owners report the robot getting confused on complex layouts or after furniture moves, a buggy Android app and map edits that do not stick. Reliability is uneven, with several owners hitting repeated wheel, side brush or stuck errors, and two sending theirs back for a refund. Edges and corners can still need a manual pass, emptying into the dock is loud, the scent dispenser is barely noticeable, and running at maximum suction cuts runtime sharply. Wi-Fi is 2.4 GHz only.
Is the eufy Omni S2 worth it?
When it works well, owners call it the best-cleaning robot they have owned, and its mop, suction consistency and obstacle avoidance justify a premium price for many of them. It also covers every major smart home platform and carries a two year warranty. The value call depends on the home: a large, open floor plan with space for the dock gets the most out of it, while a home with low furniture, ramps or tight corners may be better served by a slimmer robot with more mature software.
Frequently asked questions
Does the eufy Omni S2 work with Apple Home and SmartThings?
Yes. It supports Matter, which brings it into Apple Home and SmartThings, and it also works with Alexa, Google Home and Home Assistant.
Will the eufy Omni S2 fit under my furniture?
The robot is 98 mm tall, so it needs more clearance than that to get under a sofa or bed. One owner found it would not go under a sofa with about 10 cm of clearance.
Does the Omni S2 dock add detergent automatically?
Yes. The dock dispenses detergent into the mop water on its own, and it also empties the robot's bin and washes and dries the roller mop.
How long does the Omni S2 battery last?
It is rated for up to 179 minutes per charge and recharges in about 4 hours. Running at maximum suction shortens that considerably.
Does the Omni S2 support 5 GHz Wi-Fi?
No. It connects over 2.4 GHz Wi-Fi and also has Bluetooth.
What warranty does the eufy Omni S2 have?
It comes with a two year manufacturer warranty.
