Help me choose
A stronger Pool Express option
Niya Sonar 20 and Niya Tracker 55 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.
Niya Sonar
Niya Sonar 20
Above-ground pools up to 26 ft that need the floor cleaned without a cord.
Niya Tracker
Niya Tracker 55
Inground and above-ground pools up to 40 ft that need floor, wall and waterline cleaning without a cord, with app-selected modes.
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 CaymanNiya Sonar 20 or Niya Tracker 55: our take
Niya Sonar 20 and Niya Tracker 55 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
Niya Sonar 20 is intended for above-ground pools, while Niya Tracker 55 is intended for inground and above-ground pools. Niya Sonar 20 is rated for pools up to 26 ft; Niya Tracker 55 is rated up to 40 ft. Niya Sonar 20 cleans floor; Niya Tracker 55 cleans floor, walls, and waterline. Niya Sonar 20 lists Sonar navigation and Dual drive motors. Niya Tracker 55 lists 2 active brushes, Sonar navigation, and Dual drive motors.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Niya Sonar 20 provides one-touch starts and power-supply controls; Niya Tracker 55 provides one-touch starts and smartphone control. Both use cordless battery power. Niya Sonar 20 is listed at 10 lb versus 19.8 lb for Niya Tracker 55; that 9.8 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Niya Sonar 20 is listed at $199 and Niya Tracker 55 at $779; Niya Sonar 20 is $580 less. Niya Sonar 20 lists a 1-year warranty compared with 1.5 years for Niya Tracker 55. Niya Sonar 20 and Niya Tracker 55 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 | Niya Sonar 20 | Niya Tracker 55 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | No | YesEdge |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | No |
| Smartphone app | No | YesEdge |
| 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 Niya Sonar 20 stands out
Niya Sonar 20 is the better fit for shoppers prioritizing the lower $199 starting price.
- Is listed $580 lower
- Weighs 10 lb versus 19.8 lb
Where Niya Tracker 55 stands out
Niya Tracker 55 is the better fit for pools up to 40 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Adds smartphone control
- Carries a 1.5-year warranty instead of 1 years
- Is rated for pools up to 40 ft
Niya Sonar 20 vs Niya Tracker 55 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 | Niya Sonar 20 | Niya Tracker 55 |
|---|---|---|
| Best fit | Above-ground pools up to 26 ft that need the floor cleaned without a cord. | Inground and above-ground pools up to 40 ft that need floor, wall and waterline cleaning without a cord, with app-selected modes. |
| Starting price | $199 | $779 |
| Pool type | Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 26 ft | Up to 40 ft |
| Cleaning coverage | Floor | Floor, Walls, Waterline |
| Power | Cordless | Cordless |
| Filtration | Basket | Basket |
| Scheduling | One-touch start | One-touch start |
| App and remote | Power-supply controls | App control |
| Cable | Cordless | Cordless |
| Robot weight | 10 lb | 19.8 lb |
| Warranty | 1 years | 1.5 years |
Consider the stronger Pool Express option
Niya Sonar 20 and Niya Tracker 55 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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