Help me choose
A stronger Pool Express option
Dolphin Advantage Ultra 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.
Advantage
Dolphin Advantage Ultra
Inground pools up to 50 ft 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 QuantumDolphin Advantage Ultra or Dolphin Liberty 400: our take
Dolphin Advantage Ultra 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
Dolphin Advantage Ultra is intended for inground pools, while Dolphin Liberty 400 is intended for inground and above-ground pools. Dolphin Advantage Ultra is rated for pools up to 50 ft; Dolphin Liberty 400 is rated up to 33 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them.
Filtration and debris
Dolphin Advantage Ultra 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
Dolphin Advantage Ultra provides a weekly timer and power-supply controls; Dolphin Liberty 400 provides a weekly timer and smartphone control. Dolphin Advantage Ultra uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Liberty 400 uses cordless battery power.
Price, warranty and the decision
Dolphin Advantage Ultra is listed at $1,099 and Dolphin Liberty 400 at $1,429; Dolphin Advantage Ultra is $330 less. Dolphin Advantage Ultra lists a 2-year warranty compared with 3 years for Dolphin Liberty 400. Dolphin Advantage Ultra 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 | Dolphin Advantage Ultra | 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 | No | YesEdge |
| Anti-tangle swivel | Yes | 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 Dolphin Advantage Ultra stands out
Dolphin Advantage Ultra is the better fit for shoppers prioritizing the lower $1,099 starting price.
- Is rated for pools up to 50 ft
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $330 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
- Adds smartphone control
- Carries a 3-year warranty instead of 2 years
Dolphin Advantage Ultra 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 | Dolphin Advantage Ultra | Dolphin Liberty 400 |
|---|---|---|
| Best fit | Inground pools up to 50 ft 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 | $1,099 | $1,429 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Cordless |
| Filtration | Basket | Basket, UltraFilter |
| Scheduling | Weekly schedule | Weekly schedule + app |
| App and remote | Power-supply controls | App control |
| Cable | 60 ft with anti-tangle swivel | Cordless |
| Robot weight | Not listed | 17.9 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Dolphin Advantage Ultra 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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