Help me choose
Our pick: Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle. Dolphin Cayman carries a 2-year warranty instead of 1 years.
Max-Series
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
Niya Sonar
Niya Sonar 30
Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a 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 Niya Sonar 30: our take
Dolphin Cayman and Niya Sonar 30 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; Niya Sonar 30 is rated up to 33 ft. Dolphin Cayman cleans floor and walls; Niya Sonar 30 cleans floor, walls, and waterline. Dolphin Cayman lists 1 active brush, SmartNav 2.0 navigation, and Dual 24-volt DC motors. Niya Sonar 30 lists 2 active brushes, Sonar navigation, and Three brushless motors.
Filtration and debris
Dolphin Cayman includes MaxBin; Niya Sonar 30 includes Basket.
Controls and day-to-day ownership
Dolphin Cayman provides a weekly timer and power-supply controls; Niya Sonar 30 provides one-touch starts and power-supply controls. Dolphin Cayman uses a 50 ft corded cable, while Niya Sonar 30 uses cordless battery power. Dolphin Cayman is listed at 14.6 lb versus 19.2 lb for Niya Sonar 30; that 4.6 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Cayman is listed at $1,079 and Niya Sonar 30 at $379; Niya Sonar 30 is $700 less. Dolphin Cayman lists a 2-year warranty compared with 1 years for Niya Sonar 30. Pool Express pick: Dolphin Cayman. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle. Dolphin Cayman carries a 2-year warranty instead of 1 years. Choose Niya Sonar 30 when it is the better fit for shoppers prioritizing the lower $379 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 | Niya Sonar 30 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| 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 | 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 pools up to 40 ft.
- Can start on a weekly schedule without a manual launch before every cycle
- Carries a 2-year warranty instead of 1 years
- Is rated for pools up to 40 ft
- Runs from continuous plug-in power without a recharge between cycles
Where Niya Sonar 30 stands out
Niya Sonar 30 is the better fit for shoppers prioritizing the lower $379 starting price.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Uses 2 active brushes instead of 1
- Is listed $700 lower
Dolphin Cayman vs Niya Sonar 30 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 | Niya Sonar 30 |
|---|---|---|
| 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, wall and waterline cleaning without a cord. |
| Starting price | $1,079 | $379 |
| 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, Waterline |
| Power | Corded | Cordless |
| Filtration | MaxBin | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 50 ft | Cordless |
| Robot weight | 14.6 lb | 19.2 lb |
| Warranty | 2 years | 1 years |
Choose Dolphin Cayman
Dolphin Cayman is the Pool Express pick in this matchup. Dolphin Cayman can start on a weekly schedule without a manual launch before every cycle. Dolphin Cayman carries a 2-year warranty instead of 1 years.
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