Help me choose
A stronger Pool Express option
Dolphin Nautilus EON 100 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 Nautilus EON 100
Inground and above-ground pools up to 50 ft with steps, benches or tanning ledges that need whole-pool cordless cleaning.
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 Nautilus EON 100 or Niya Tracker 55: our take
Dolphin Nautilus EON 100 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 Nautilus EON 100 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 Nautilus EON 100 lists 2 active brushes and SmartMap navigation. 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
Dolphin Nautilus EON 100 provides a weekly timer and smartphone control; Niya Tracker 55 provides one-touch starts and smartphone control. Both use cordless battery power. Dolphin Nautilus EON 100 is listed at 22.1 lb versus 19.8 lb for Niya Tracker 55; that 2.3000000000000007 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Nautilus EON 100 is listed at $899 and Niya Tracker 55 at $779; Niya Tracker 55 is $120 less. Dolphin Nautilus EON 100 lists a 1-year warranty compared with 1.5 years for Niya Tracker 55. Dolphin Nautilus EON 100 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 Nautilus EON 100 | Niya Tracker 55 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | Yes | Yes |
| 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 Nautilus EON 100 stands out
Dolphin Nautilus EON 100 is the better fit for pools up to 50 ft.
- Can start on a weekly schedule without a manual launch before every cycle
- Is rated for pools up to 50 ft
Where Niya Tracker 55 stands out
Niya Tracker 55 is the better fit for shoppers prioritizing the lower $779 starting price.
- Carries a 1.5-year warranty instead of 1 years
- Is listed $120 lower
- Weighs 19.8 lb versus 22.1 lb
Dolphin Nautilus EON 100 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 Nautilus EON 100 | Niya Tracker 55 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft with steps, benches or tanning ledges that need whole-pool cordless cleaning. | 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 | $899 | $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 | Basket |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | App control |
| Cable | Cordless | Cordless |
| Robot weight | 22.1 lb | 19.8 lb |
| Warranty | 1 years | 1.5 years |
Consider the stronger Pool Express option
Dolphin Nautilus EON 100 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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