Help me choose
A stronger Pool Express option
Dolphin Nautilus Pool Up and Dolphin S100 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.
S-Line
Dolphin S100
Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
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 Dolphin S100: our take
Dolphin Nautilus Pool Up and Dolphin S100 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; Dolphin S100 is rated up to 33 ft. Each cleans floor and walls, so coverage alone does not separate them. Dolphin Nautilus Pool Up's documented cleaning system includes 1 active brush.
Filtration and debris
Dolphin Nautilus Pool Up includes Oversized leaf bag; Dolphin S100 includes Basket and UltraFilter. Dolphin S100 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Nautilus Pool Up provides one-touch starts and power-supply controls; Dolphin S100 provides a weekly timer and power-supply controls. Dolphin Nautilus Pool Up uses a 40 ft corded cable, while Dolphin S100 uses a 50 ft corded cable. Dolphin Nautilus Pool Up is listed at 18 lb versus 14 lb for Dolphin S100; that 4 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Nautilus Pool Up is listed at $499 and Dolphin S100 at $849; Dolphin Nautilus Pool Up is $350 less. Each lists a 2-year manufacturer warranty. Dolphin Nautilus Pool Up and Dolphin S100 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 | Dolphin S100 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | YesEdge |
| Smartphone app | No | No |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | Yes | Yes |
| 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 shoppers prioritizing the lower $499 starting price.
- Includes an oversized leaf bag for bulky seasonal debris
- Is listed $350 lower
Where Dolphin S100 stands out
Dolphin S100 is the better fit for pools up to 33 ft.
- Includes filtration for sand, pollen and other fine debris
- Can start on a weekly schedule without a manual launch before every cycle
- Is rated for pools up to 33 ft
- Weighs 14 lb versus 18 lb
Dolphin Nautilus Pool Up vs Dolphin S100 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 | Dolphin S100 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 30 ft that need floor and wall cleaning, with heavy leaves. | Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris. |
| Starting price | $499 | $849 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 30 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls |
| Power | Corded | Corded |
| Filtration | Oversized leaf bag | Basket, UltraFilter |
| Scheduling | One-touch start | Weekly schedule |
| App and remote | Power-supply controls | Power-supply controls |
| Cable | 40 ft | 50 ft |
| Robot weight | 18 lb | 14 lb |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Nautilus Pool Up and Dolphin S100 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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