Help me choose
A stronger Pool Express option
Dolphin Liberty 200 and Dolphin S50 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
Liberty
Dolphin Liberty 200
Inground and above-ground pools that need floor and wall cleaning, without a power cord.
What we recommend instead
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
$1,079
Buy Dolphin CaymanDolphin Liberty 200 or Dolphin S50: our take
Dolphin Liberty 200 and Dolphin S50 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 Liberty 200 is intended for inground and above-ground pools, while Dolphin S50 is intended for above-ground pools. Dolphin S50 has a published maximum pool length of 30 ft; the other model does not have a verified length in our source material. Dolphin Liberty 200 cleans floor and walls; Dolphin S50 cleans floor. Dolphin Liberty 200 lists Dual DC motors. Dolphin S50 lists 1 active brush.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Dolphin Liberty 200 provides no fully published timer, app or remote specification; Dolphin S50 provides one-touch starts and power-supply controls. Dolphin Liberty 200 uses cordless battery power, while Dolphin S50 uses a 40 ft corded cable.
Price, warranty and the decision
Dolphin Liberty 200 is listed at $999 and Dolphin S50 at $649; Dolphin S50 is $350 less. Each lists a 2-year manufacturer warranty. Dolphin Liberty 200 and Dolphin S50 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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 Liberty 200 | Dolphin S50 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Not listed | No |
| Smartphone app | Not listed | No |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | No | YesEdge |
| 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 Liberty 200 stands out
Dolphin Liberty 200 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
- Adds wall climbing and scrubbing
- Cleans floor and walls
Where Dolphin S50 stands out
Dolphin S50 is the better fit for shoppers prioritizing the lower $649 starting price.
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $350 lower
Dolphin Liberty 200 vs Dolphin S50 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 Liberty 200 | Dolphin S50 |
|---|---|---|
| Best fit | Inground and above-ground pools that need floor and wall cleaning, without a power cord. | Above-ground pools up to 30 ft that need floor cleaning. |
| Starting price | $999 | $649 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Not listed | Up to 30 ft |
| Cleaning coverage | Floor, Walls | Floor |
| Power | Cordless | Corded |
| Filtration | Basket | Basket |
| Scheduling | Not listed | One-touch start |
| App and remote | Not listed | Power-supply controls |
| Cable | Cordless | 40 ft |
| Robot weight | Not listed | 14 lb |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Liberty 200 and Dolphin S50 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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