Help me choose
A stronger Pool Express option
Dolphin T25 and Niya Tracker 55 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
T-Line
Dolphin T25
Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
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 Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin T25 or Niya Tracker 55: our take
Dolphin T25 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
Both robots are intended for inground and above-ground pools. Dolphin T25 is rated for pools up to 33 ft; Niya Tracker 55 is rated up to 40 ft. Dolphin T25 cleans floor and walls; Niya Tracker 55 cleans floor, walls, and waterline. Dolphin T25 lists 1 active brush. Niya Tracker 55 lists 2 active brushes, Sonar navigation, and Dual drive motors.
Filtration and debris
Dolphin T25 includes Basket and UltraFilter; Niya Tracker 55 includes Basket. That gives Dolphin T25 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin T25 provides a weekly timer and power-supply controls; Niya Tracker 55 provides one-touch starts and smartphone control. Dolphin T25 uses a 50 ft corded cable, while Niya Tracker 55 uses cordless battery power. Dolphin T25 is listed at 15 lb versus 19.8 lb for Niya Tracker 55; that 4.800000000000001 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin T25 is listed at $849 and Niya Tracker 55 at $779; Niya Tracker 55 is $70 less. Dolphin T25 lists a 2-year warranty compared with 1.5 years for Niya Tracker 55. Dolphin T25 and Niya Tracker 55 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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 T25 | Niya Tracker 55 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | No | YesEdge |
| Anti-tangle swivel | Not listed | 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 T25 stands out
Dolphin T25 is the better fit for inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Carries a 2-year warranty instead of 1.5 years
- Runs from continuous plug-in power without a recharge between cycles
Where Niya Tracker 55 stands out
Niya Tracker 55 is the better fit for shoppers prioritizing the lower $779 starting price.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Uses 2 active brushes instead of 1
- Adds smartphone control
- Is rated for pools up to 40 ft
Dolphin T25 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 | Dolphin T25 | Niya Tracker 55 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris. | 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 | $849 | $779 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 33 ft | Up to 40 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Corded | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Power-supply controls | App control |
| Cable | 50 ft | Cordless |
| Robot weight | 15 lb | 19.8 lb |
| Warranty | 2 years | 1.5 years |
Consider the stronger Pool Express option
Dolphin T25 and Niya Tracker 55 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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