# Aiper Scuba S1 vs Chasing Hydro 4 SE

As of Nov 4, 2026, the Aiper Scuba S1 costs $498 and the Chasing Hydro 4 SE costs $449, so the Chasing Hydro 4 SE is $49 cheaper. Pick the Aiper Scuba S1 for cordless cleaning on a tight budget. Pick the Chasing Hydro 4 SE for medium pools where a cord is not a problem.

Prices checked Nov 4, 2026. HTML version: https://robotsforthat.com/vs/aiper-scuba-s1-vs-chasing-hydro-4-se/

## Side by side

| | Aiper Scuba S1 | Chasing Hydro 4 SE |
|---|---|---|
| Price | $498 | $449 |
| 3 year cost | $498 | $449 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #21 | #20 |
| Status | on sale | on sale |
| Warranty | 2 years | 2 years |
| Pool types | In-ground | In ground and above ground, 1.6 to 9.8 ft deep; salt up to 5,000 ppm (Chasing and RobotShop) |
| Cleans | Floor, walls and waterline; no surface skimming | Floor, walls and waterline (Chasing says) |
| Power | Cordless (battery capacity not published) | Corded AC, 150 W peak, 39.4 ft (12 m) cable per the spec table; box contents say 40 ft (Chasing) |
| Runtime | Up to 150 min | Auto cycles of 1, 2 or 3 h; wall only 2 h; floor only 2 h; Ultra Clean 3 h (Chasing says) |
| Charge time | 3 to 4 h per Reviewed | None needed, corded |
| Filter | 3.5 L filter basket per Reviewed | 180 micron dual zone basket, 4.1 L; optional 50 micron basket (Chasing says) |
| Max pool size | Up to 1,600 sq ft per Reviewed | Up to 1,614 sq ft (Chasing says) |
| App | None; button selects floor, wall, auto and eco modes | Chasing app with scheduled start; no underwater control (Chasing comparison table); Happy TechFam found Bluetooth drops once submerged |
| Warranty | 2 years | 2 years (Chasing store) |
| Weight | n/a | 14.3 lb, 6.5 kg robot plus 2.9 lb control box (Chasing says) |
| Best for | cordless cleaning on a tight budget | medium pools where a cord is not a problem |
| Skip if | your pool gets heavy leaf fall | you want app control while it is underwater |

## What reviewers found

### Aiper Scuba S1

- Reviewed: In a roughly 1,200 sq ft pool it climbed walls well and covered most of the pool, but left leaves behind and needed four cycles for a spotless pool; drying the charging port was a chore. [Source](https://reviewed.com/home-outdoors/content/aiper-scuba-s1-robotic-pool-cleaner-review)
- The Smart Home Hookup: Ran 3 h 56 min against 150 min listed with about 95% wall and floor coverage, the best in the group, but its rear suction stirred up leaves. [Source](https://www.thesmarthomehookup.com/?p=5626)

### Chasing Hydro 4 SE

- Happy TechFam (blog): Hands on long term use. Picked up large leaves, twigs, sand and silt, and walls and waterline looked clean. Path did not always follow the S pattern, some areas got covered twice, auto docking was not always reliable, and corners and steps needed occasional brushing. Bluetooth dropped underwater. Site earns Amazon affiliate fees. [Source](https://happytechfam.online/review-the-chasing-poolmate-hydro-4-se-pool-robot-cleaner-for-effortless-pool-maintenance/)
- Greattips3s (blog): Claims two weeks of daily use in an 18 by 36 ft gunite pool with about 1 h 45 min cycles and under 3 kWh total power use. No byline, several unsourced and conflicting figures, and affiliate links, so treat it as weak evidence. [Source](https://www.greattips3s.com/2026/04/chasing-hydro-4-se-review-corded-pool.html)

## Questions buyers ask

### Which is better, the Aiper Scuba S1 or the Chasing Hydro 4 SE?

Pick the Aiper Scuba S1 for cordless cleaning on a tight budget. Pick the Chasing Hydro 4 SE for medium pools where a cord is not a problem.

### Which is cheaper?

The Chasing Hydro 4 SE at $449, versus $498 for the Aiper Scuba S1, checked Nov 4, 2026.

### What is the difference between the Scuba S1 and the Hydro 4 SE?

Pool types: In-ground on the Scuba S1, In ground and above ground, 1.6 to 9.8 ft deep; salt up to 5,000 ppm (Chasing and… on the Hydro 4 SE. Cleans: Floor, walls and waterline; no surface skimming on the Scuba S1, Floor, walls and waterline (Chasing says) on the Hydro 4 SE. Power: Cordless (battery capacity not published) on the Scuba S1, Corded AC, 150 W peak, 39.4 ft (12 m) cable per the spec table; box contents say 40 ft… on the Hydro 4 SE.

Full reviews: [Aiper Scuba S1](https://robotsforthat.com/robot/aiper-scuba-s1/index.md), [Chasing Hydro 4 SE](https://robotsforthat.com/robot/chasing-hydro-4-se/index.md)