Help me choose
Our pick: Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman is rated for pools up to 40 ft. Dolphin Cayman's documented advantages include maxBin.
Max-Series
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
S-Line
Dolphin S100
Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
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 S100: our take
Dolphin Cayman and Dolphin S100 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 is rated for pools up to 40 ft; Dolphin S100 is rated up to 33 ft. 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 S100 lists 1 active brush.
Filtration and debris
Dolphin Cayman includes MaxBin; Dolphin S100 includes Basket and UltraFilter. Dolphin S100 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Both models provide a weekly timer and power-supply controls. Both use a 50 ft corded cable. Dolphin Cayman is listed at 14.6 lb versus 14 lb for Dolphin S100; 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 S100 at $849; Dolphin S100 is $230 less. Each lists a 2-year manufacturer warranty. Pool Express pick: Dolphin Cayman. Dolphin Cayman is rated for pools up to 40 ft. Dolphin Cayman's documented advantages include maxBin. Choose Dolphin S100 when it is the better fit for shoppers prioritizing the lower $849 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 S100 |
|---|---|---|
| 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 | Yes |
| 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.
- Is rated for pools up to 40 ft
- MaxBin
Where Dolphin S100 stands out
Dolphin S100 is the better fit for shoppers prioritizing the lower $849 starting price.
- Includes filtration for sand, pollen and other fine debris
- Is listed $230 lower
- Weighs 14 lb versus 14.6 lb
Dolphin Cayman vs Dolphin S100 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 S100 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 40 ft that need floor and wall cleaning. | Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris. |
| Starting price | $1,079 | $849 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 40 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls |
| Power | Corded | Corded |
| Filtration | MaxBin | Basket, UltraFilter |
| Scheduling | Weekly schedule | Weekly schedule |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 50 ft | 50 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 is rated for pools up to 40 ft. Dolphin Cayman's documented advantages include maxBin.
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