Help me choose
A stronger Pool Express option
Dolphin Nautilus Pool Up and Niya Sonar Ray 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.
Nautilus
Dolphin Nautilus Pool Up
Inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves.
Niya Sonar
Niya Sonar Ray
Flat-bottomed above-ground and small inground 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 Pool Up or Niya Sonar Ray: our take
Dolphin Nautilus Pool Up and Niya Sonar Ray 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 Pool Up is rated for pools up to 30 ft; Niya Sonar Ray is rated up to 26 ft. Dolphin Nautilus Pool Up cleans floor and walls; Niya Sonar Ray cleans floor. Dolphin Nautilus Pool Up lists 1 active brush. Niya Sonar Ray lists Sonar navigation.
Filtration and debris
Dolphin Nautilus Pool Up includes Oversized leaf bag; Niya Sonar Ray includes Basket.
Controls and day-to-day ownership
Both models provide one-touch starts and power-supply controls. Dolphin Nautilus Pool Up uses a 40 ft corded cable, while Niya Sonar Ray uses cordless battery power. Dolphin Nautilus Pool Up is listed at 18 lb versus 7.1 lb for Niya Sonar Ray; that 10.9 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Nautilus Pool Up is listed at $499 and Niya Sonar Ray at $199; Niya Sonar Ray is $300 less. Dolphin Nautilus Pool Up lists a 2-year warranty compared with 1 years for Niya Sonar Ray. Dolphin Nautilus Pool Up and Niya Sonar Ray 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 Pool Up | Niya Sonar Ray |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | YesEdge | No |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | No |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | No |
| Smartphone app | No | No |
| 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 Nautilus Pool Up stands out
Dolphin Nautilus Pool Up is the better fit for pools up to 30 ft.
- Adds wall climbing and scrubbing
- Includes an oversized leaf bag for bulky seasonal debris
- Carries a 2-year warranty instead of 1 years
- Is rated for pools up to 30 ft
Where Niya Sonar Ray stands out
Niya Sonar Ray is the better fit for shoppers prioritizing the lower $199 starting price.
- Is listed $300 lower
- Weighs 7.1 lb versus 18 lb
Dolphin Nautilus Pool Up vs Niya Sonar Ray 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 Pool Up | Niya Sonar Ray |
|---|---|---|
| Best fit | Inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves. | Flat-bottomed above-ground and small inground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $499 | $199 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 30 ft | Up to 26 ft |
| Cleaning coverage | Floor, Walls | Floor |
| Power | Corded | Cordless |
| Filtration | Oversized leaf bag | Basket |
| Scheduling | One-touch start | One-touch start |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 40 ft | Cordless |
| Robot weight | 18 lb | 7.1 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Dolphin Nautilus Pool Up and Niya Sonar Ray 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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