Help me choose
A stronger Pool Express option
Dolphin EON 120d and Niya Sonar 20 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.
EON
Dolphin EON 120d
Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty.
Niya Sonar
Niya Sonar 20
Above-ground pools up to 26 ft that need the floor cleaned without a 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 EON 120d or Niya Sonar 20: our take
Dolphin EON 120d and Niya Sonar 20 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 EON 120d is intended for inground and above-ground pools, while Niya Sonar 20 is intended for above-ground pools. Dolphin EON 120d is rated for pools up to 50 ft; Niya Sonar 20 is rated up to 26 ft. Dolphin EON 120d cleans floor, walls, and waterline; Niya Sonar 20 cleans floor. Dolphin EON 120d lists SmartMap navigation. Niya Sonar 20 lists Sonar navigation and Dual drive motors.
Filtration and debris
Dolphin EON 120d includes Basket and UltraFilter; Niya Sonar 20 includes Basket. That gives Dolphin EON 120d the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin EON 120d provides a weekly timer and smartphone control; Niya Sonar 20 provides one-touch starts and power-supply controls. Both use cordless battery power. Dolphin EON 120d is listed at 24.3 lb versus 10 lb for Niya Sonar 20; that 14.3 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin EON 120d lists a 3-year warranty compared with 1 years for Niya Sonar 20. Dolphin EON 120d and Niya Sonar 20 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 EON 120d | Niya Sonar 20 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | YesEdge | No |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | No | 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 EON 120d stands out
Dolphin EON 120d is the better fit for pools up to 50 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Adds smartphone control
Where Niya Sonar 20 stands out
Niya Sonar 20 is the better fit for above-ground pools up to 26 ft that need the floor cleaned without a cord.
- Weighs 10 lb versus 24.3 lb
- Cleans the pool floor
Dolphin EON 120d vs Niya Sonar 20 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 EON 120d | Niya Sonar 20 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with minimal filter maintenance and a three-year warranty. | Above-ground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | See product | $199 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Up to 50 ft | Up to 26 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Cordless | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | Power-supply controls |
| Cable | Cordless | Cordless |
| Robot weight | 24.3 lb | 10 lb |
| Warranty | 3 years | 1 years |
Consider the stronger Pool Express option
Dolphin EON 120d and Niya Sonar 20 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.
More robotic pool cleaner comparisons
Keep comparing without rebuilding the same specification table yourself.
Clear UV vs Clear S
Pool Express pick: Clear UV
Dolphin Quantum vs Clear S
Pool Express pick: Dolphin Quantum
Dolphin Premier vs Dolphin Sigma
Pool Express pick: Dolphin Premier
Dolphin Premier vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Sigma vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Cayman vs Dolphin Escape
Pool Express pick: Dolphin Cayman