Help me choose
A stronger Pool Express option
Blue Helix One and Dolphin Liberty 400 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Blue Helix
Blue Helix One
Inground pools that need floor, wall and waterline cleaning.
Liberty
Dolphin Liberty 400
Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumBlue Helix One or Dolphin Liberty 400: our take
Blue Helix One and Dolphin Liberty 400 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Blue Helix One is intended for inground pools, while Dolphin Liberty 400 is intended for inground and above-ground pools. Dolphin Liberty 400 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Each cleans floor, walls, and waterline, so coverage alone does not separate them.
Filtration and debris
Blue Helix One includes Basket; Dolphin Liberty 400 includes Basket and UltraFilter. Dolphin Liberty 400 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Both models provide a weekly timer and smartphone control. Blue Helix One uses continuous corded power, while Dolphin Liberty 400 uses cordless battery power.
Price, warranty and the decision
Blue Helix One is listed at $579 and Dolphin Liberty 400 at $1,429; Blue Helix One is $850 less. Blue Helix One lists a 2-year warranty compared with 3 years for Dolphin Liberty 400. Blue Helix One and Dolphin Liberty 400 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Blue Helix One | Dolphin Liberty 400 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | No | YesEdge |
| No recharging between cycles | YesEdge | No |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Blue Helix One stands out
Blue Helix One is the better fit for shoppers prioritizing the lower $579 starting price.
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $850 lower
Where Dolphin Liberty 400 stands out
Dolphin Liberty 400 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
- Includes filtration for sand, pollen and other fine debris
- Carries a 3-year warranty instead of 2 years
Blue Helix One vs Dolphin Liberty 400 specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Blue Helix One | Dolphin Liberty 400 |
|---|---|---|
| Best fit | Inground pools that need floor, wall and waterline cleaning. | Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord. |
| Starting price | $579 | $1,429 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Not listed | Up to 33 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Cordless |
| Filtration | Basket | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App control | App control |
| Cable | Not listed | Cordless |
| Robot weight | Not listed | 17.9 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Blue Helix One and Dolphin Liberty 400 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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