Help me choose
Our pick: Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman runs from continuous plug-in power without a recharge between cycles. Dolphin Cayman is listed $20 lower.
Max-Series
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
Liberty
Dolphin Liberty 300
Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.
Why Dolphin Cayman is our pick
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
$1,079
Buy Dolphin CaymanDolphin Cayman or Dolphin Liberty 300: our take
Dolphin Cayman and Dolphin Liberty 300 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
Both robots are intended for inground and above-ground pools. Dolphin Cayman has a published maximum pool length of 40 ft; the other model does not have a verified length in our source material. Each cleans floor and walls, so coverage alone does not separate them. Dolphin Cayman lists 1 active brush, SmartNav 2.0 navigation, and Dual 24-volt DC motors. Dolphin Liberty 300 lists Dual DC motors.
Filtration and debris
Dolphin Cayman includes MaxBin; Dolphin Liberty 300 includes Basket and UltraFilter. Dolphin Liberty 300 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Cayman provides a weekly timer and power-supply controls; Dolphin Liberty 300 provides no fully published timer, app or remote specification. Dolphin Cayman uses a 50 ft corded cable, while Dolphin Liberty 300 uses cordless battery power.
Price, warranty and the decision
Dolphin Cayman is listed at $1,079 and Dolphin Liberty 300 at $1,099; Dolphin Cayman is $20 less. Each lists a 2-year manufacturer warranty. Pool Express pick: Dolphin Cayman. Dolphin Cayman runs from continuous plug-in power without a recharge between cycles. Dolphin Cayman is listed $20 lower. Choose Dolphin Liberty 300 when it is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
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 Cayman | Dolphin Liberty 300 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Not listed |
| Smartphone app | No | Not listed |
| Anti-tangle swivel | No | Not listed |
| 3-year warranty | No | No |
| 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 Cayman stands out
Dolphin Cayman is the better fit for shoppers prioritizing the lower $1,079 starting price.
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $20 lower
Where Dolphin Liberty 300 stands out
Dolphin Liberty 300 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
- Cordless, battery powered
Dolphin Cayman vs Dolphin Liberty 300 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 Cayman | Dolphin Liberty 300 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 40 ft that need floor and wall cleaning. | Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord. |
| Starting price | $1,079 | $1,099 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 40 ft | Not listed |
| Cleaning coverage | Floor, Walls | Floor, Walls |
| Power | Corded | Cordless |
| Filtration | MaxBin | Basket, UltraFilter |
| Scheduling | Weekly schedule | Not listed |
| App and remote | Power-supply controls | Not listed |
| Cable | 50 ft | Cordless |
| Robot weight | 14.6 lb | Not listed |
| Warranty | 2 years | 2 years |
Choose Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman runs from continuous plug-in power without a recharge between cycles. Dolphin Cayman is listed $20 lower.
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