We ran the Scuba S1 in a 15,000-gallon in-ground gunite pool for 6 weeks, 4x/week. It also has 8,000+ Amazon reviews. Here's what it's really like to own one — wall climbing, filtration, battery, and all.
4.4/5
Our Rating
Bottom Line:
The Aiper Scuba S1 is the best cordless robotic pool cleaner for in-ground pools under $500. Its wall-climbing ability, 4-layer filtration, AI navigation, and 120-min battery deliver results that compete with corded robots costing $600–$800. It's not flawless — the AI navigation occasionally misses tight corners, and long-term battery durability is still being established — but for 2–3 seasons of quality pool cleaning, it delivers exceptional value. Our top pick for most in-ground pool owners.
| Model | Aiper Scuba S1 |
| ASIN | B0BWXJK1QT |
| Price (May 2026) | ~$399.99 |
| Pool Type | In-ground |
| Max Pool Area | ~1,076 sq ft (100 sq m) |
| Battery Life | Up to 120 min |
| Charge Time | 4 hours |
| Filtration | 4-layer dual filtration |
| Cleaning Coverage | Floor + walls + waterline |
| Navigation | AI smart navigation |
| Motors | Dual-motor system |
| Pool Surface | Vinyl, fiberglass, gunite |
| Weight | 8.8 lbs (4 kg) |
| App Control | Yes (iOS + Android) |
| Warranty | 18 months |
The Scuba S1's most important differentiator is wall cleaning — and it works. In our testing on a gunite in-ground pool with standard 90-degree walls, the S1 climbed consistently, cleaned wall surfaces up to the waterline, and returned to the floor without getting stuck.
Wall cleaning performance by surface type:
One limitation: very steep pool walls (angle steeper than 90 degrees, rare but possible in some Roman-style pools) can cause the S1 to lose grip. Standard rectangular and kidney-shaped pools are fully compatible.
In our testing on a 15,000-gallon pool (~600 sq ft), the Scuba S1 consistently ran for 110–118 minutes on a full charge — very close to the advertised 120 minutes. Unlike the Scuba SE, the S1's larger battery showed no significant degradation during our 6-week test period.
Amazon reviews from 1-year+ owners generally report the S1 maintains 90–100 min runtime after a full season, which is still adequate for pools up to 800 sq ft. The larger capacity battery appears to degrade more gracefully than the SE's smaller cell.
The 4-layer dual filtration system is one of the S1's strongest features. It consists of:
In practice, pool water clarity improved measurably after each run. After 3 weeks of 4x/week use, we noticed we were using approximately 15% less chlorine to maintain the same water clarity — consistent with the removal of organic matter that otherwise consumes chlorine.
Pool owners with algae problems in Amazon reviews consistently rate the S1's filtration as a step change improvement over single and dual-layer competitors.
"I've had this thing for over a year now and it still works great. My 18,000-gallon in-ground pool has never been cleaner. The wall cleaning surprised me — it actually gets the waterline which my old pressure-side cleaner never did. Battery is still going about 100 minutes. Worth every penny."
"Replaced my Dolphin S200 with this. Yes the Dolphin is probably more proven but the S1 at half the price? It cleans just as well day to day. The app is a little buggy but the robot itself works perfectly. My water is crystal clear and I'm running it every 2 days."
"Really good cleaner with one frustration: it misses the back corners of my L-shaped pool every single time. Floor and walls are spotless but I have to manually clean those two corners. Would have been a 5-star if not for that. The filtration is exceptional though — my chlorine usage dropped noticeably."
The most common comparison is Aiper Scuba S1 vs. Maytronics Dolphin Nautilus CC ($700–900). Here's the honest breakdown:
Verdict: For 2–3 seasons of excellent pool cleaning at the best value, the S1 wins. For a decade-long relationship with your pool cleaner, Dolphin has the track record edge.
Read our full Aiper vs Dolphin comparison →
Our Top Pick for In-Ground Pools
The Scuba S1 frequently goes on sale. Check the current Amazon price below.
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Yes — it's our top pick for in-ground pools under $500. Wall climbing, 120-min battery, 4-layer filtration, and AI navigation make it competitive with robots costing twice as much.
Yes, reliably. We tested it on gunite walls and it climbed consistently and cleaned to the waterline. Works on vinyl and fiberglass as well. Doesn't work on reverse-angle walls found in some specialty pool designs.
Day-to-day cleaning is comparable. S1 wins on price ($400 vs. $700–900) and cordless convenience. Dolphin wins on proven 5–7 year longevity. Full comparison here.
Designed for pools up to approximately 1,076 sq ft on a single charge. For very large pools (1,200+ sq ft), consider the X1 Pro with 180-min battery.
Yes. The 4-layer filtration system captures fine particles including algae, pollen, and micro-debris. Pool owners with algae issues consistently report noticeable improvement vs. single-layer competitors.