Help me choose
A stronger Pool Express option
Dolphin Nautilus EON 100 and Niya Tracker 25 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.
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 25
Above-ground 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 Nautilus EON 100 or Niya Tracker 25: our take
Dolphin Nautilus EON 100 and Niya Tracker 25 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
Dolphin Nautilus EON 100 is intended for inground and above-ground pools, while Niya Tracker 25 is intended for above-ground pools. Dolphin Nautilus EON 100 is rated for pools up to 50 ft; Niya Tracker 25 is rated up to 26 ft. Dolphin Nautilus EON 100 cleans floor, walls, and waterline; Niya Tracker 25 cleans floor. Dolphin Nautilus EON 100 lists 2 active brushes and SmartMap navigation. Niya Tracker 25 lists Sonar navigation and Brushless 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 25 provides one-touch starts and power-supply controls. Both use cordless battery power. Dolphin Nautilus EON 100 is listed at 22.1 lb versus 10 lb for Niya Tracker 25; that 12.100000000000001 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 25 at $379; Niya Tracker 25 is $520 less. Dolphin Nautilus EON 100 lists a 1-year warranty compared with 1.5 years for Niya Tracker 25. Dolphin Nautilus EON 100 and Niya Tracker 25 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 Nautilus EON 100 | Niya Tracker 25 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | YesEdge | No |
| Smartphone app | YesEdge | 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 Nautilus EON 100 stands out
Dolphin Nautilus EON 100 is the better fit for pools up to 50 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Can start on a weekly schedule without a manual launch before every cycle
- Adds smartphone control
- Is rated for pools up to 50 ft
Where Niya Tracker 25 stands out
Niya Tracker 25 is the better fit for shoppers prioritizing the lower $379 starting price.
- Carries a 1.5-year warranty instead of 1 years
- Is listed $520 lower
- Weighs 10 lb versus 22.1 lb
Dolphin Nautilus EON 100 vs Niya Tracker 25 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 25 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 50 ft with steps, benches or tanning ledges that need whole-pool cordless cleaning. | Above-ground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $899 | $379 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Up to 50 ft | Up to 26 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Cordless | Cordless |
| Filtration | Basket | Basket |
| Scheduling | Weekly schedule + app | One-touch start |
| App and remote | App control | Power-supply controls |
| Cable | Cordless | Cordless |
| Robot weight | 22.1 lb | 10 lb |
| Warranty | 1 years | 1.5 years |
Consider the stronger Pool Express option
Dolphin Nautilus EON 100 and Niya Tracker 25 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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