Eufy · Review
Eufy S1
A roller mop that washes itself as it goes — clean water on the floor, always.
Tested & updated June 12, 2026
The S1's always-clean roller is the closest a robot gets to mopping the way you would — fresh water, constant pressure, no grey smears. If mopping is the chore you care about, this is the machine.
best for — Tile- and hardwood-heavy homes where mopping quality is the point
- Cleaning
- 8.2
- Mopping
- 9.0
- Navigation
- 8.5
- App & smarts
- 8.4
- Value
- 7.8
$749.99 at Amazon
price as of Jun 12, 5:52 PM ET — subject to change
Pros & cons
▲ What we like
- +Roller is rinsed and squeegeed mid-run — it never smears dirty water
- +Best single-pass mopping score of any robot in this guide
- +Full-width roller reaches closer to baseboards than spinning pads
- +Station handles washing, drying, and emptying
▼ What we don't
- −Vacuuming is competent, not flagship-grade
- −Premium price for a mop-first machine
- −Roller and tray need a deep clean every few weeks
Key specs
- Type
- Mop-first hybrid, roller mop
- Mop system
- HydroJet — roller rewets & scrapes continuously
- Dock
- All-in-One Station: washes, refills, dries
- Navigation
- LiDAR
- Carpet
- Auto mop lift on rugs
- Self-empty
- Yes, at the station
Full review
01Design & the roller difference
Most robot mops drag the same increasingly-dirty pad across your whole floor. The S1's HydroJet system instead spins a full-width roller that is continuously sprayed with clean water and scraped clean on every rotation — by the end of a long run, the roller looks presentable while rival pads look like crime scenes. The All-in-One Station washes and heat-dries the roller and empties the dustbin between runs.
02Mopping performance
In our dried-on test grid (coffee, soy sauce, and 24-hour orange juice rings on porcelain tile), the S1 cleared 9 of 12 stains in a single pass — the best one-pass result of any robot in this guide, combos included. Constant downward pressure plus always-clean water is the difference; pad-based combos managed 5 to 7. Edge coverage is strong for a roller design, with only a thin margin left along baseboards.
03Vacuuming, navigation & app
The vacuum side is the supporting act: solid hard-floor pickup and respectable low-pile carpet numbers, with automatic mop lifting when it detects rugs. LiDAR mapping was quick and accurate, and the Eufy Clean app handles zones, schedules, and water-flow settings without drama. There's no camera obstacle avoidance, so keep cables off the floor.
04Who should buy it
Buy the S1 if your home is mostly hard flooring and you want mopping done properly, not approximately. If your home is carpet-heavy, a vacuum-first combo above serves you better — the S1's genius is wasted on rugs it has to lift away from.
Eufy S1
The S1's always-clean roller is the closest a robot gets to mopping the way you would — fresh water, constant pressure, no grey smears. If mopping is the chore you care about, this is the machine.
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