Help me choose
Our pick: Clear UV
Clear UV is the Pool Express pick in this matchup. Clear UV adds built-in UV-C water treatment while the robot cleans. Clear UV is listed $400 lower.
CLEAR
Clear UV
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
ProLine
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Why Clear UV is our pick
Clear UV
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,999
Buy Clear UVClear UV or Dolphin Sigma: our take
Clear UV and Dolphin Sigma 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 pools. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Clear UV lists 2 active brushes, Intelligent navigation (C9 microprocessor), and Quad (2 pump + 2 drive) motors. Dolphin Sigma lists 2 active brushes, SmartNav 3.0 with gyroscope navigation, and Triple commercial-grade DC motors.
Filtration and debris
Clear UV includes UltraFilter; Dolphin Sigma includes Standard filter and NanoFilters. 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
Both models provide a weekly timer, smartphone control, and included remote control. Clear UV uses a 59 ft corded cable with an anti-tangle swivel, while Dolphin Sigma uses a 55 ft corded cable with an anti-tangle swivel. Clear UV is listed at 27.6 lb versus 24.6 lb for Dolphin Sigma; that 3 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Clear UV is listed at $1,999 and Dolphin Sigma at $2,399; Clear UV is $400 less. Each lists a 3-year manufacturer warranty. Pool Express pick: Clear UV. Clear UV adds built-in UV-C water treatment while the robot cleans. Clear UV is listed $400 lower. Choose Dolphin Sigma when it is the better fit for 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 | Clear UV | Dolphin Sigma |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | No | No |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Yes | Yes |
| 3-year warranty | Yes | Yes |
| No recharging between cycles | Yes | Yes |
| Built-in UV-C water treatment | YesEdge | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Clear UV stands out
Clear UV is the better fit for shoppers prioritizing the lower $1,999 starting price.
- Adds built-in UV-C water treatment while the robot cleans
- Is listed $400 lower
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.
- Uses a triple-motor cleaning system
- Adds gyroscope-assisted navigation
- Weighs 24.6 lb versus 27.6 lb
Clear UV vs Dolphin Sigma 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 | Clear UV | Dolphin Sigma |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. |
| Starting price | $1,999 | $2,399 |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | UltraFilter | Standard filter, NanoFilters |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App + included remote | App + included remote |
| Cable | 59 ft with anti-tangle swivel | 55 ft with anti-tangle swivel |
| Robot weight | 27.6 lb | 24.6 lb |
| Warranty | 3 years | 3 years |
Choose Clear UV
Clear UV is the Pool Express pick in this matchup. Clear UV adds built-in UV-C water treatment while the robot cleans. Clear UV is listed $400 lower.
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