Help me choose
A stronger Pool Express option
Dolphin Liberty 300 and Niya Sonar Ray 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.
Liberty
Dolphin Liberty 300
Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.
Niya Sonar
Niya Sonar Ray
Flat-bottomed above-ground and small inground 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 Liberty 300 or Niya Sonar Ray: our take
Dolphin Liberty 300 and Niya Sonar Ray 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. Niya Sonar Ray has a published maximum pool length of 26 ft; the other model does not have a verified length in our source material. Dolphin Liberty 300 cleans floor and walls; Niya Sonar Ray cleans floor. Dolphin Liberty 300 lists Dual DC motors. Niya Sonar Ray lists Sonar navigation.
Filtration and debris
Dolphin Liberty 300 includes Basket and UltraFilter; Niya Sonar Ray includes Basket. That gives Dolphin Liberty 300 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Liberty 300 provides no fully published timer, app or remote specification; Niya Sonar Ray provides one-touch starts and power-supply controls. Both use cordless battery power.
Price, warranty and the decision
Dolphin Liberty 300 is listed at $1,099 and Niya Sonar Ray at $199; Niya Sonar Ray is $900 less. Dolphin Liberty 300 lists a 2-year warranty compared with 1 years for Niya Sonar Ray. Dolphin Liberty 300 and Niya Sonar Ray 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 Liberty 300 | Niya Sonar Ray |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | No | No |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Not listed | No |
| Smartphone app | Not listed | No |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | No | 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 Liberty 300 stands out
Dolphin Liberty 300 is the better fit for inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.
- Adds wall climbing and scrubbing
- Includes filtration for sand, pollen and other fine debris
- Carries a 2-year warranty instead of 1 years
Where Niya Sonar Ray stands out
Niya Sonar Ray is the better fit for shoppers prioritizing the lower $199 starting price.
- Is listed $900 lower
- Cleans the pool floor
Dolphin Liberty 300 vs Niya Sonar Ray 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 Liberty 300 | Niya Sonar Ray |
|---|---|---|
| Best fit | Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord. | Flat-bottomed above-ground and small inground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $1,099 | $199 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Not listed | Up to 26 ft |
| Cleaning coverage | Floor, Walls | Floor |
| Power | Cordless | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Not listed | One-touch start |
| App and remote | Not listed | Power-supply controls |
| Cable | Cordless | Cordless |
| Robot weight | Not listed | 7.1 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Dolphin Liberty 300 and Niya Sonar Ray 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.
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