When comparing the Aiper Scuba S1 Pro vs Dolphin Liberty 400, we’re looking at two of the most capable cordless robotic pool cleaners on the market. Both models promise wall-climbing performance, smart navigation, and powerful debris removal in a fully wireless form factor. However, key differences in runtime, suction strength, filtration capacity, and smart features make one a more complete package than the other.
In this detailed side-by-side comparison, we break down everything pool owners need to know to choose the superior cleaner for their in-ground or above-ground pool.
Contents
Differences Between Aiper Scuba S1 Pro vs Dolphin Liberty 400
Design Comparison
The Aiper Scuba S1 Pro is designed as a premium heavy-duty cleaner for larger pools up to 2,150 sq ft, while the Dolphin Liberty 400 is optimized for pools up to 968 sq ft, making it better suited to small to mid-sized residential pools. The Scuba S1 Pro’s heavier frame supports a quad brushless motor system, resulting in more powerful propulsion and suction than the Liberty 400 can provide.
The Dolphin Liberty 400 is lighter at 17.9 lb, easier to handle, and features the Click-Up™ system for magnetic pole retrieval at the water’s edge. The Scuba S1 Pro lacks Click-Up™, but features auto-parking, surfacing near the wall when the cleaning cycle ends for manual removal.
In terms of material quality and waterproof sealing, both robots feature IPX8-rated enclosures, making them safe for full underwater operation. However, the Scuba S1 Pro’s larger dimensions and dual-layer basket system allow for more effective debris capture and extended use without interruption.
Winner: Aiper Scuba S1 Pro
With a sturdier build, larger pool compatibility, and more robust internal components, it offers more durability and range than the Liberty 400.
Cleaning Performance Comparison
Both models provide floor, wall, and waterline cleaning, but they differ significantly in runtime, suction power, and coverage efficiency. The Scuba S1 Pro can operate up to 180 minutes on a single charge, while the Liberty 400 is limited to 90 minutes. The longer runtime of the Scuba S1 Pro allows it to clean larger pools in one uninterrupted cycle, reducing the need for recharging mid-session.
In terms of suction strength, the Scuba S1 Pro delivers up to 4,200 GPH, with peak potential up to 6,600 GPH depending on water resistance and internal flow configuration. The Dolphin Liberty 400 doesn’t publish an official suction rate but is estimated around 3,000 GPH, which is adequate for light debris but less efficient for heavier contamination or larger debris volumes.
Filtration performance strongly favors the Scuba S1 Pro, which uses a 5-liter top-load basket with dual-layer filtration — a 180 μm coarse mesh pre-filter paired with a 3 μm fine mesh. This setup captures both large leaves and fine silt without clogging easily. In contrast, the Liberty 400 uses a single-layer fine cartridge filter, which fills faster and requires more frequent cleaning.
The Scuba S1 Pro features a PVC active roller brush powered by the quad-motor system, ensuring constant contact with surfaces for deep scrubbing. The Liberty 400 also has an active brush, but it lacks the power and traction delivered by Aiper’s caterpillar track design.
Winner: Aiper Scuba S1 Pro
Superior runtime, multi-surface cleaning, stronger suction, and more advanced filtration system make it the more capable cleaning robot overall.
Feature Comparison
Both robots support app connectivity, but only the Scuba S1 Pro offers full app control via Wi-Fi and Bluetooth through the Aiper App. This includes cleaning mode selection, scheduling, real-time battery monitoring, firmware updates (OTA), and status alerts. Modes available include Auto, Eco, Floor-only, Wall-only, and Waterline, allowing detailed customization depending on season, debris load, and surface focus.
The Dolphin Liberty 400 offers only limited Bluetooth pairing, and lacks real-time control or mode switching via app. It also does not support OTA updates or battery level monitoring. Cleaning modes are fixed and non-customizable.
Charging time further distinguishes the two. The Scuba S1 Pro charges in 3–4 hours, while the Liberty 400’s inductive charging system requires up to 6 hours. While inductive charging is safer and contact-free, the longer cycle limits same-day re-cleaning or back-to-back usage.
Additional features exclusive to the Scuba S1 Pro include LED battery indicator, auto-parking, quad brushless motors, IPX8 waterproof rating, and a sealed 5 L debris chamber for extended cleaning sessions without intervention.
Winner: Aiper Scuba S1 Pro
Full app control, cleaning mode flexibility, OTA upgrades, shorter charging time, and broader system intelligence make it the smarter, more user-friendly device.
Quick Rundown Of Aiper Scuba S1 Pro
Quick Rundown Of Dolphin Liberty 400
Conclusion
Choose Aiper Scuba S1 Pro if you want high-end cordless cleaning for larger pools, longer runtime, powerful suction, app-based control, and a large debris basket. It’s ideal for homeowners looking for a smart, high-efficiency solution that requires minimal intervention and delivers consistent performance every cycle.
Choose Dolphin Liberty 400 if you have a small to mid-size pool, prefer contactless inductive charging, and want an easy retrieval system. It’s a great fit for users who value convenience and simplicity over power and configurability.
Overall Winner: Aiper Scuba S1 Pro
With its superior runtime, smarter app integration, stronger suction, more advanced filtration, and high-capacity debris storage, the Aiper Scuba S1 Pro emerges as the most powerful and versatile cordless robotic pool cleaner for modern pools. It offers performance, control, and reliability that go far beyond the basics — making it the premium choice for serious pool maintenance.