Eufy Omni S2 review

Eufy Omni S2: Introduction

• Type: Robot vacuum with roller mop
• Docking: Self-emptying, self-cleaning dock
• Navigation system: 3D ToF sensor and RGB camera

Robot vacuums can now pick up objects, climb tall thresholds and even leave their mopping pads behind. The Eufy Omni S2 has a different party trick: it makes your home smell fresher as it cleans.

Its built-in fragrance system releases a gentle scent while the robot moves around, but this is more than a novelty feature. The Omni S2 is also a powerful vacuum and mop, backed by intelligent navigation, strong obstacle avoidance and a polished app.

It is also one of the more expensive robot cleaners available. The question is whether its cleaning performance and fragrant extras can justify the price.

Design and features

• Built-in fragrance system
• Wide, self-cleaning roller mop
• Strong obstacle avoidance
• No mop-only mode

The Omni S2 is an upgraded version of the Eufy Omni S1, one of the first robot cleaners to use a full-width roller mop instead of traditional spinning pads. The new model looks familiar, but adds more power and features.

Its docking station is tall and narrow rather than short and wide.

A transparent 2.5-litre clean-water tank sits at the top, using ozone to sterilise the water before it reaches the robot. Below it is a 1.8-litre dirty-water tank.

The dock also holds Eufy’s hard-floor cleaning solution. This comes in a proprietary container that slots directly into the station, so you cannot pour in an alternative cleaner. That is less flexible than rivals such as the Roborock Saros 20.

Dust is automatically transferred into a 3-litre bag hidden beneath the water tanks. Reaching it takes more effort than it should, but the capacity means you will probably only need to replace the bag every couple of months.

The robot itself has a rounded-square design and stands 98mm high. With no LiDAR turret on top, it can squeeze beneath most sofas, cabinets and sideboards.

A front-facing camera works with the navigation sensors to identify and avoid obstacles.

There is also an internal dustbin beneath the top panel. The dock empties this automatically, although its filter still needs regular cleaning and occasional replacement.

The fragrance pod sits beneath the same cover. As the robot cleans, a diffuser releases scent into the room. Eufy includes a selection of fragrances, with each pod designed to last up to three months.

Replacement packs cost £24.99 and only Eufy’s pods are compatible. The fragrance itself is gentle, gradually building as the robot moves around. It is far less noticeable than the burst of scent produced by Shark’s Anti-Odour Cartridges, but it does leave rooms smelling pleasantly fresh.

Underneath, there are two side brushes, one of which extends to tackle room edges. The main brush is split in the middle, encouraging wrapped hair to move towards the centre and into the bin.

The rear is dominated by a wide roller mop. Eufy’s HydroJet 2.0 system continuously adds clean water while scraping dirty water into a separate tank, reducing the risk of dragging grime across the floor. The roller can also extend sideways for improved edge coverage.

When carpet is detected, the mop lifts by up to 5cm. That should protect most short-pile carpets, although homes with deeper flooring may be better served by a robot that can remove its pads or seal away its mop completely.

Setup takes place through the Eufy app. After a quick mapping run, the app suggests room divisions that can be split, merged or renamed. You can also mark carpets, create no-go areas and position furniture.

Furniture placement feels largely cosmetic, however. I could not select the sofa on my map as a quick-cleaning zone, limiting the usefulness of the feature.

Cleaning can be carried out across the entire home, in individual rooms or within custom zones. You can choose between AI cleaning, vacuuming and mopping, or vacuuming alone. There is no mop-only option, which feels like an oversight.

Water flow, suction power and route intensity can all be adjusted, with a choice of one or two passes. Advanced settings offer extra control over navigation, while Dirty Spot Cleaning lets the robot identify stains and give them additional attention.

Performance

• Excellent suction
• Effective everyday mopping
• Strong navigation
• Tough stains may need help

The Omni S2 performed impressively throughout testing. Its 30,000Pa suction power made short work of flour sprinkled onto carpet, removing everything in a single clean. Results were equally strong on hard flooring, where loose debris disappeared without leaving a visible trace.

Edge cleaning was less convincing. The extending side brush could not pull out all the debris during the vacuuming test, leaving some mess behind. Running the robot again with the mop enabled produced a much cleaner result.

Mopping performance was strong across most stains. Coffee disappeared after two passes, as did red wine. A mixture of dried mud and solid debris was also handled well, with the vacuum collecting the loose material before the roller removed the remaining marks.

Dried ketchup proved far more difficult. Two passes removed only part of the stain, which had hardened in hot weather. After applying kitchen cleaner and sending the Omni S2 out again, it removed most of the remaining mess, although the Roborock Saros 20 performed better in the same test.

Hair handling was excellent. After spreading human hair across the carpet, the robot collected it without leaving strands wrapped around the main brush.

Noise measured 61.2dB. The Omni S2 is clearly audible while cleaning, but it is not unpleasantly loud.

Battery life is another strength. It covered the entire Trusted Reviews Home Technology Lab, roughly equivalent to a typical home, with two cleaning passes and still had enough charge remaining for smaller spot-cleaning jobs.

Navigation was consistently reliable. The Omni S2 moved around fake pet mess, shoes and cables without getting caught or pushing obstacles around. It also completed cleaning runs without becoming trapped.

Final thoughts

The fragrance system is pleasant, but it is unlikely to be the main reason to buy the Eufy Omni S2. The scent is subtle, the pods are proprietary and replacements are relatively expensive.

Fortunately, the underlying robot is very capable. Suction is excellent, the roller mop deals well with most everyday stains, and navigation is dependable. Hair handling and battery life are also strong.

The biggest issue is price. The Omni S2 costs more than many similarly equipped rivals, while missing useful features such as mop-only cleaning and removable mopping hardware. The app is smart and easy to use, but could give its furniture mapping and cleaning controls more practical purpose.

If you find the Omni S2 at a significant discount, it is an excellent all-round cleaner with a distinctive extra feature. At full price, its capable competition makes it harder to recommend without reservation.

How we test

When we publish our reviews, you can rest assured that they are the result of “living with” long term tests.

Robot cleaners usually live within an ecosystem, or a range of products that – supposedly – all work in harmony. And they are designed to offer a range of different cleaning options. Therefore, it’s impossible to use a robo cleaner for a week and deliver a verdict.

Because we’re testing smart home kit all day, everyday, we know what matters and how a particular smart cleaning machine compares to alternatives that you might also be considering.

Our reviews are comprehensive, objective and fair and, of course, we are never paid directly to review a device.

Read our guide on how we test robot vacuum cleaners to learn more.

FAQs

Eufy Omni S2: Specifications