Robotic pool cleaner comparison

Blue Helix One vs Dolphin Active 15

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

Blue Helix One and Dolphin Active 15 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.

Buy Dolphin Quantum Compare every robot

Blue Helix

Blue Helix One

Inground pools that need floor, wall and waterline cleaning.

Listed price $579

View better alternatives

Active

Dolphin Active 15

Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.

Listed price $849

View better alternatives

A better alternative

What we recommend instead

Pool Express pick

Dolphin Quantum

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

$1,649

Buy Dolphin Quantum

Buying guidance

Blue Helix One or Dolphin Active 15: our take

Blue Helix One and Dolphin Active 15 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

Blue Helix One is intended for inground pools, while Dolphin Active 15 is intended for inground and above-ground pools. Dolphin Active 15 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Blue Helix One cleans floor, walls, and waterline; Dolphin Active 15 cleans floor and walls. Dolphin Active 15's documented cleaning system includes 1 active brush.

Filtration and debris

Blue Helix One includes Basket; Dolphin Active 15 includes Basket and UltraFilter. Dolphin Active 15 has the clearer documented edge for fine silt, pollen and sand.

Controls and day-to-day ownership

Blue Helix One provides a weekly timer and smartphone control; Dolphin Active 15 provides a weekly timer and power-supply controls. Blue Helix One uses continuous corded power, while Dolphin Active 15 uses a 40 ft corded cable.

Price, warranty and the decision

Blue Helix One is listed at $579 and Dolphin Active 15 at $849; Blue Helix One is $270 less. Each lists a 2-year manufacturer warranty. Blue Helix One and Dolphin Active 15 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	Blue Helix One	Dolphin Active 15
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	Yes	Yes
Scrubs the waterline	YesEdge	No
Fine-debris filter included	No	YesEdge
Large-debris filter	Yes	Yes
Automatic scheduling	Yes	Yes
Smartphone app	YesEdge	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 Blue Helix One stands out

Blue Helix One is the better fit for shoppers prioritizing the lower $579 starting price.

Cleans the floor, walls and waterline instead of stopping below the tile line
Adds smartphone control
Is listed $270 lower

Where Dolphin Active 15 stands out

Dolphin Active 15 is the better fit for inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.

Includes filtration for sand, pollen and other fine debris
Cleans floor and walls