Help me choose
Our pick: Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman adds wall climbing and scrubbing. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle.
Max-Series
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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 S50: our take
Dolphin Cayman 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 Cayman is intended for inground and above-ground pools, while Dolphin S50 is intended for above-ground pools. Dolphin Cayman is rated for pools up to 40 ft; Dolphin S50 is rated up to 30 ft. Dolphin Cayman cleans floor and walls; Dolphin S50 cleans floor. Dolphin Cayman lists 1 active brush, SmartNav 2.0 navigation, and Dual 24-volt DC motors. Dolphin S50 lists 1 active brush.
Filtration and debris
Dolphin Cayman includes MaxBin; Dolphin S50 includes Basket.
Controls and day-to-day ownership
Dolphin Cayman provides a weekly timer and power-supply controls; Dolphin S50 provides one-touch starts and power-supply controls. Dolphin Cayman uses a 50 ft corded cable, while Dolphin S50 uses a 40 ft corded cable. Dolphin Cayman is listed at 14.6 lb versus 14 lb for Dolphin S50; that 0.5999999999999996 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Cayman is listed at $1,079 and Dolphin S50 at $649; Dolphin S50 is $430 less. Each lists a 2-year manufacturer warranty. Pool Express pick: Dolphin Cayman. Dolphin Cayman adds wall climbing and scrubbing. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle. Choose Dolphin S50 when it is the better fit for shoppers prioritizing the lower $649 starting price.
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 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 | YesEdge | No |
| Smartphone app | No | No |
| Anti-tangle swivel | No | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | Yes | Yes |
| 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 pools up to 40 ft.
- Adds wall climbing and scrubbing
- Can start on a weekly schedule without a manual launch before every cycle
- Is rated for pools up to 40 ft
Where Dolphin S50 stands out
Dolphin S50 is the better fit for shoppers prioritizing the lower $649 starting price.
- Is listed $430 lower
- Weighs 14 lb versus 14.6 lb
Dolphin Cayman 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 Cayman | Dolphin S50 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 40 ft that need floor and wall cleaning. | Above-ground pools up to 30 ft that need floor cleaning. |
| Starting price | $1,079 | $649 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Up to 40 ft | Up to 30 ft |
| Cleaning coverage | Floor, Walls | Floor |
| Power | Corded | Corded |
| Filtration | MaxBin | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 50 ft | 40 ft |
| Robot weight | 14.6 lb | 14 lb |
| Warranty | 2 years | 2 years |
Choose Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman adds wall climbing and scrubbing. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle.
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