Quick Answer: The eufy S1 Pro was the world’s first robot vacuum with a self-washing HydroJet roller mop — an 11.4-inch roller that scrubs at 170 RPM with ~1 kg of pressure and rinses itself with clean water while mopping, per eufy. It launched in 2024 at $1,499.99, was discontinued by eufy in April 2026 in favor of the new $1,599.99 Omni S2, and remaining stock has sold on Amazon for as low as $699.99 (53% off), per Android Headlines. eufy confirms support and consumables continue. Verdict: at clearance pricing it’s 2026’s best mopping-first value — buy it for hard floors, skip it if you need max carpet suction (8,000 Pa is a 2024 number) or want a robot with a future roadmap.
Most discontinued products die because they failed. The eufy S1 Pro is the rarer case: a genuine category-creator that got killed by its own successor. When it shipped in 2024, its HydroJet roller mop — a full-width, self-washing roller instead of the usual pair of spinning pads — was a real first, and the industry noticed: roller mops are now the headline feature on 2026 flagships from Narwal, Dreame, and eufy’s own Omni S2. In April 2026 eufy pulled the S1 Pro from its lineup, and clearance pricing did what clearance pricing does. That leaves a genuinely interesting question for 2026 buyers: is the robot that invented the roller mop worth buying at half price, now that its replacement costs twice as much? This review answers exactly that.
eufy S1 Pro by the numbers
- $1,499.99 → $699.99 — launch list price versus the lowest Amazon clearance price tracked (53% off, per Android Headlines, February 2026); list-price deals of $630 off have run repeatedly since discontinuation.
- Discontinued April 2026 — per eufy’s official notice; the standard S1 followed in June 2026. Support, warranty service, and consumables continue.
- 170 RPM roller, ~1 kg downforce — the 11.4-inch (29 cm) HydroJet microfiber roller spins at up to 170 RPM with about a kilogram of downward pressure, per eufy — closer to hand-scrubbing than any drag pad.
- Real-time self-washing — clean water sprays the roller while a scraper strips dirty water into a separate tank as it mops, per eufy; disc-pad robots mop with dirtying pads until the next dock visit.
- 99.99% bacteria removal claim — the UniClean station’s ozone generator (a robot-vacuum first) sanitizes the mop water, per eufy.
- 8,000 Pa suction · 170 min runtime — 4,600 mAh battery covers about 1,976 sq ft per charge (up to 3.6 hours max), per eufy.
Specs at a glance
| Spec | eufy S1 Pro (Omni S1 Pro) |
|---|---|
| Mopping | HydroJet roller: 11.4 in (29 cm), up to 170 RPM, ~1 kg downforce, washes itself in real time |
| Suction | 8,000 Pa |
| Navigation | Internal LiDAR (turret-free body) + 3D MatrixEye binocular infrared obstacle avoidance |
| Dock | UniClean station: self-empty, real-time mop wash + dry, water refill, detergent dosing |
| Sanitization | Eco-Clean Ozone generator in clean-water tank — 99.99% bacteria removal claim, per eufy |
| Battery | 4,600 mAh · ~170 min standard vacuum+mop · up to 3.6 h max · ~1,976 sq ft |
| Launched | 2024 at $1,499.99 |
| Status | Discontinued April 2026 (support & consumables continue, per eufy) |
| 2026 street price | Clearance: seen at $699.99; typically ~$700–$900 while stock lasts |
| Rating | ★★★★½ (at clearance pricing) |
eufy S1 Pro
- HydroJet roller mop scrubs at 170 RPM with ~1 kg of pressure and rinses itself with clean water the entire run — dried-on stains that defeat drag pads don't survive it.
- UniClean station handles everything: self-empty, real-time mop washing, drying, water refill, detergent, and ozone-sanitized mop water.
- Discontinued April 2026 → clearance pricing. eufy confirms warranty support and consumables continue for owners.
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The HydroJet roller mop: still the reason to buy one
Every robot-mop design faces the same embarrassing question: what is the robot actually spreading around by minute forty? Spinning-disc flagships — the eufy X10 Pro Omni, Roborock’s Qrevo line — mop with two pads that get progressively dirtier between dock washes. The S1 Pro’s answer was structural: a full-width 11.4-inch microfiber roller spinning at up to 170 RPM with about 1 kg of downward pressure, continuously sprayed with clean water while a scraper wrings the dirty water into a separate onboard tank, per eufy. The mop is effectively clean for the entire run.
In practice that’s the difference between “smears dried coffee into a wider, thinner coffee stain” and actually removing it. Reviewers landed where you’d expect: Tech Advisor’s verdict was titled “it really does it all,” and Vacuum Wars praised the roller system’s scrubbing performance while noting the value question at the $1,499.99 launch price. That value question has since been answered by a 53% price cut.
The design was influential in a way few single models are. Narwal’s Flow, Dreame’s 2026 wet-dry hybrids, and eufy’s own Omni S2 all moved to self-cleaning roller systems. If you want to see where the roller-mop category went next, our best robot mop and best mopping robot vacuum guides rank the 2026 field — but the S1 Pro remains the cheapest way to get the real thing.
Vacuuming: 8,000 Pa is the honest weak spot
The S1 Pro is a mopping-first machine, and its vacuum spec shows its 2024 birthday. 8,000 Pa was flagship-tier then; 2026 flagships advertise 22,000–36,000 Pa (Roborock Saros line) and the Omni S2 hits 30,000 Pa, per eufy. Numbers aren’t everything — pickup on hard floors is strong, and the anti-tangle roller brush handles hair well — but on mid- and high-pile carpet the S1 Pro is a solid performer rather than a deep-cleaning monster. It also lifts its mop over carpet rather than the full roller-removal some newer rivals do, so thick rugs stay dry but get a lighter vacuum-only pass.
If your home is mostly carpet, spend your money on suction instead — our best robot vacuum for carpet picks are built for that job. The S1 Pro’s natural habitat is the hardwood-and-tile home, which is why it has long featured in our best robot vacuum for hardwood floors thinking: maximum scrub, mop that never spreads dirt, ozone-sanitized water.
See eufy S1 Pro stock on Amazon →
Discontinued in April 2026: what that actually means for buyers
eufy’s own notice is unusually clear: the Omni S1 Pro left the US lineup in April 2026, the standard S1 followed in June, and — direct quote in spirit — existing owners keep full support. Firmware updates continue, warranty service continues, and consumables (roller mops, filters, brushes, cleaning solution) remain available. This is a lineup consolidation around the Omni S2, not a company exiting a category.
For a used-or-clearance buyer, the practical checklist:
- Warranty starts at purchase — a new-in-box clearance unit from Amazon carries the standard eufy warranty; buy from listings sold/shipped by Amazon or eufy’s official store.
- Consumables are commodity-adjacent — the roller and filters are eufy parts, but supply is confirmed ongoing per eufy’s discontinuation notice; a spare roller with the purchase is cheap insurance.
- No future hardware revisions — what it does today is what it will do in 2028, minus whatever firmware polish arrives. For a floor-washing robot, that’s less of a problem than it sounds; the mechanism is the product.
The price story: $1,499.99 → $699.99
| Date | Price | Source |
|---|---|---|
| 2024 (launch) | $1,499.99 | eufy MSRP |
| 2025 | ~$1,100–$1,300 typical deals | Repeated $200–$400-off promos |
| February 2026 | $699.99 (53% off) | Amazon, per Android Headlines |
| April 2026 | Discontinued — clearance begins | eufy official notice |
| July 2026 | ~$700–$900 while stock lasts | Amazon clearance listings |
The comparison that matters: the Omni S2 costs $1,599.99. Same core idea — self-washing roller mop, all-in-one station — with 30,000 Pa suction, HydroJet 2.0, and a 12-in-1 dock that stores dust for 68 days, per eufy. If the S2’s upgrades are worth roughly $800 extra to you, buy the future. If they’re not, the S1 Pro at clearance is the single best price-to-scrub ratio in the 2026 market. That’s also the honest framing for our best robot vacuum and mop tier list: the S1 Pro is the value entry to true roller mopping.
eufy S1 Pro vs Omni S2 vs X10 Pro Omni
| S1 Pro | Omni S2 | X10 Pro Omni | |
|---|---|---|---|
| Mop | HydroJet roller, real-time self-wash | HydroJet 2.0 roller | Dual spinning pads (dock-washed) |
| Suction | 8,000 Pa | 30,000 Pa AeroTurbo 2.0 | 8,000 Pa |
| Obstacle avoidance | 3D MatrixEye binocular IR | 3D MatrixEye 2.0 | AI camera |
| Dock | UniClean + ozone water | 12-in-1 UniClean, 68-day dust, fragrance | Omni station (wash + dry + empty) |
| Status | Discontinued 4/2026 | Current flagship (launched 1/2026) | Current |
| Price | ~$700–$900 clearance | $1,599.99 | ~$600–$800 |
| Best for | Max scrub per dollar | Money-no-object eufy | Balanced vacuum+mop value |
The X10 Pro Omni remains the sensible middle: similar money to a clearance S1 Pro, better all-round vacuum-and-mop balance, still in the lineup. The S1 Pro beats it in one dimension — scrubbing — by a wide margin. For the whole brand ladder, see our best eufy robot vacuum guide, or cross-shop the brand in eufy vs Roborock and eufy vs Roomba.
Who should buy the eufy S1 Pro in 2026
- Buy it if your home is mostly hardwood, tile, or LVP and mopping quality is the point — nothing near $700–$900 scrubs like a 170 RPM self-washing roller.
- Buy it if you want the Omni S2’s core idea without the $1,599.99 price; the S1 Pro is the same concept, one generation earlier, at roughly half the cost.
- Buy it if the ozone-sanitized mop water matters to you — households with crawling babies and pets are exactly who eufy built it for.
- Skip it if your home is carpet-heavy: 8,000 Pa was 2024’s flagship number, and a modern high-suction pick from our best robot vacuum guide cleans carpet better.
- Skip it if buying a discontinued model bothers you on principle — the Omni S2 is the supported successor, and its 30,000 Pa motor is a real upgrade, not spec-sheet noise.
The bottom line
The eufy S1 Pro invented the self-washing roller mop, watched the entire industry copy it, and then got retired by its own $1,599.99 successor eighteen months later. None of that makes it clean floors any worse. At its $1,499.99 launch price it was a bold buy; at the $699.99–$900 clearance prices it has sold for since eufy discontinued it in April 2026, it’s the best pure-mopping value of the year — with confirmed ongoing support and consumables straight from eufy’s own notice. Buy it for the roller, accept the 2024-era suction, and let someone else pay $800 more for the sequel.