Help me choose
A stronger Pool Express option
Dolphin Nautilus Titan and Dolphin S100 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.
Nautilus
Dolphin Nautilus Titan
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control.
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 Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin Nautilus Titan or Dolphin S100: our take
Dolphin Nautilus Titan 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
Dolphin Nautilus Titan is intended for inground pools, while Dolphin S100 is intended for inground and above-ground pools. Dolphin Nautilus Titan is rated for pools up to 50 ft; Dolphin S100 is rated up to 33 ft. Dolphin Nautilus Titan cleans floor, walls, and waterline; Dolphin S100 cleans floor and walls. Dolphin Nautilus Titan lists 2 active brushes and CleverClean navigation. Dolphin S100 lists 1 active brush.
Filtration and debris
Both models include Basket and UltraFilter. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability.
Controls and day-to-day ownership
Dolphin Nautilus Titan provides a weekly timer and smartphone control; Dolphin S100 provides a weekly timer and power-supply controls. Dolphin Nautilus Titan uses continuous corded power, while Dolphin S100 uses a 50 ft corded cable. Dolphin Nautilus Titan is listed at 22.6 lb versus 14 lb for Dolphin S100; that 8.600000000000001 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Nautilus Titan is listed at $1,599 and Dolphin S100 at $849; Dolphin S100 is $750 less. Dolphin Nautilus Titan lists a 1-year warranty compared with 2 years for Dolphin S100. Dolphin Nautilus Titan and Dolphin S100 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 Titan | Dolphin S100 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | YesEdge | No |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | YesEdge | No |
| Anti-tangle swivel | Yes | 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 Titan stands out
Dolphin Nautilus Titan is the better fit for pools up to 50 ft.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Uses 2 active brushes instead of 1
- Adds smartphone control
- Is rated for pools up to 50 ft
Where Dolphin S100 stands out
Dolphin S100 is the better fit for shoppers prioritizing the lower $849 starting price.
- Carries a 2-year warranty instead of 1 years
- Is listed $750 lower
- Weighs 14 lb versus 22.6 lb
Dolphin Nautilus Titan 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 Titan | Dolphin S100 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app control. | Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris. |
| Starting price | $1,599 | $849 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Up to 33 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls |
| Power | Corded | Corded |
| Filtration | Basket, UltraFilter | Basket, UltraFilter |
| Scheduling | Weekly schedule + app | Weekly schedule |
| App and remote | App control | Power-supply controls |
| Cable | Not listed | 50 ft |
| Robot weight | 22.6 lb | 14 lb |
| Warranty | 1 years | 2 years |
Consider the stronger Pool Express option
Dolphin Nautilus Titan and Dolphin S100 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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