The Aiper Scuba S3 and the Ecovacs Ultramarine P1 are evenly matched, rated 4.0 and 4.0. The Ecovacs Ultramarine P1 wins on value. The Ecovacs Ultramarine P1 costs $150 less ($499.99 vs $649.99).
A light, mid-priced robot for small-to-mid-size in-ground pools that need floor, wall and waterline cleaning. For a little more, the Scuba V3 adds AI debris detection and a wireless dock.
Amazon $699.99 Aiper $649.99A sensible first robot for mid-size pools whose owners want fine filtration and app scheduling for about $500. Ecovacs says it’s for daily upkeep, not heavy-duty cleaning.
Ecovacs $499.99Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every cordless robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Aiper Scuba S3 | Ecovacs Ultramarine P1 |
|---|---|---|
| Overall rating | 4.0/5 | 4.0/5 |
| Value 25% | 59 $650 | 70 $500 |
| Cleaning 25% | 85 Floor, walls and waterline | 85 Floor, walls and waterline |
| Navigation 15% | 50 Gyroscope + sensors | 50 Gyroscope |
| Warranty 15% | 50 2-year warranty | 50 warranty not published (neutral score used) |
| Pool size 10% | 100 pools up to 1,610 sq ft | 100 pools up to 1,940 sq ft |
| Features 10% | 100 2 of 2 | 67 2 of 3; no easy pickup |
| Aiper Scuba S3 | Ecovacs Ultramarine P1 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 1,614 sq ft (150 m²) | Up to 1,937 sq ft (180 m²) |
| Pool types | In-ground | In-ground and above-ground |
| Surfaces | Concrete, fiberglass, vinyl, tile | Fiberglass, pebble |
| Max depth | - | 9.8 ft |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor, walls and waterline |
| Surface skimming | No | No |
| Filter | Top-load 3.5 L dual-layer basket (180 µm + 3 µm) | Dual-layer filter (180 µm mesh + 3 µm ultra-fine) |
| Filter capacity | 3.5 L | - |
| Water flow | 4,800 gal/h | 4,800 gal/h |
| Power | ||
| Power | Cordless (battery) | Cordless (battery) |
| Battery | - | 4,600 mAh, 24 V |
| Run time | Up to 4 h | Up to 3 h |
| Charge time | 4 h | 4 h |
| Charging | - | Cable |
| Navigation & app | ||
| Navigation | Gyroscope + sensors | Gyroscope |
| App | - | Yes |
| Connectivity | - | Bluetooth |
| Scheduling | Yes | Yes |
| Retrieval | Parks at the waterline for pickup | Stops near the pool edge when done (hook included) |
| Build | ||
| Water resistance | - | IP68 |
| Weight | 18 lb (8.2 kg) | - |
| Warranty | 2 years | - |
| Released | - | 2026 |
