Help me choose
A stronger Pool Express option
Dolphin EON 120d 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.
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 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 EON 120d or Niya Tracker 55: our take
Dolphin EON 120d 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 EON 120d is rated for pools up to 50 ft; Niya Tracker 55 is rated up to 40 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin EON 120d lists SmartMap navigation. Niya Tracker 55 lists 2 active brushes, Sonar navigation, and Dual drive motors.
Filtration and debris
Dolphin EON 120d includes Basket and UltraFilter; Niya Tracker 55 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 Tracker 55 provides one-touch starts and smartphone control. Both use cordless battery power. Dolphin EON 120d is listed at 24.3 lb versus 19.8 lb for Niya Tracker 55; that 4.5 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 1.5 years for Niya Tracker 55. Dolphin EON 120d 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 EON 120d | Niya Tracker 55 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | Yes | Yes |
| 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.
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Carries a 3-year warranty instead of 1.5 years
- Is rated for pools up to 50 ft
Where Niya Tracker 55 stands out
Niya Tracker 55 is the better fit for inground and above-ground pools up to 40 ft that need floor, wall and waterline cleaning without a cord, with app-selected modes.
- Weighs 19.8 lb versus 24.3 lb
- Cleans floor, walls and waterline
Dolphin EON 120d 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 EON 120d | Niya Tracker 55 |
|---|---|---|
| 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. | 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 | See product | $779 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 40 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Cordless | Cordless |
| Filtration | Basket, UltraFilter | Basket |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | App control |
| Cable | Cordless | Cordless |
| Robot weight | 24.3 lb | 19.8 lb |
| Warranty | 3 years | 1.5 years |
Consider the stronger Pool Express option
Dolphin EON 120d 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.
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