Help me choose
Residential and commercial pools need different robots
Dolphin Sigma and Dolphin Wave 90i serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Sigma for residential use. Choose Dolphin Wave 90i for commercial use.
ProLine
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Wave
Dolphin Wave 90i
Commercial pools up to 65 ft that need floor, wall and waterline cleaning.
Choose residential and commercial cleaners separately
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$2,399
Buy Dolphin Sigma
Dolphin Wave 90i
Commercial pools up to 65 ft that need floor, wall and waterline cleaning.
$2,399
Buy Dolphin Wave 90iDolphin Sigma or Dolphin Wave 90i: our take
Dolphin Sigma and Dolphin Wave 90i can be compared on specifications, but they are designed for different jobs. Start with residential versus commercial use, then use the details below to understand the tradeoffs.
Pool fit and cleaning reach
Dolphin Sigma is intended for inground pools, while Dolphin Wave 90i is intended for commercial pools. Dolphin Sigma is rated for pools up to 50 ft; Dolphin Wave 90i is rated up to 65 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Sigma lists 2 active brushes, SmartNav 3.0 with gyroscope navigation, and Triple commercial-grade DC motors. Dolphin Wave 90i lists Commercial-grade motors.
Filtration and debris
Dolphin Sigma has documented included filtration—Standard filter and NanoFilters—while the other model's included media is not fully published. That gives Dolphin Sigma the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Sigma provides a weekly timer, smartphone control, and included remote control; Dolphin Wave 90i provides smartphone control. Dolphin Sigma uses a 55 ft corded cable with an anti-tangle swivel, while Dolphin Wave 90i uses continuous corded power.
Price, warranty and the decision
Both are listed at $2,399. Dolphin Sigma lists a 3-year warranty compared with 2 years for Dolphin Wave 90i. These robots are built for different jobs, so pool type and facility capacity decide the comparison before individual features do. For a residential pool, the Pool Express pick is Dolphin Sigma. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. For a commercial facility, the Pool Express pick is Dolphin Wave 90i. Commercial pools up to 65 ft that need floor, wall and waterline 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 Sigma | Dolphin Wave 90i |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | No | No |
| Automatic scheduling | Yes | Not listed |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | YesEdge | 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 Sigma stands out
Dolphin Sigma is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
- Includes filtration for sand, pollen and other fine debris
- Uses a triple-motor cleaning system
- Carries a 3-year warranty instead of 2 years
Where Dolphin Wave 90i stands out
Dolphin Wave 90i is the better fit for pools up to 65 ft.
- Is rated for pools up to 65 ft
- Corded, plug-in power supply
Dolphin Sigma vs Dolphin Wave 90i 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 Sigma | Dolphin Wave 90i |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Commercial pools up to 65 ft that need floor, wall and waterline cleaning. |
| Starting price | $2,399 | $2,399 |
| Pool type | Inground | Commercial |
| Maximum pool length | Up to 50 ft | Up to 65 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Standard filter, NanoFilters | Not listed |
| Scheduling | Weekly schedule + app | Not listed |
| App and remote | App + included remote | App control |
| Cable | 55 ft with anti-tangle swivel | Not listed |
| Robot weight | 24.6 lb | Not listed |
| Warranty | 3 years | 2 years |
Choose for the pool you operate
Dolphin Sigma and Dolphin Wave 90i serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Sigma for residential use. Choose Dolphin Wave 90i for commercial use.
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