Robotic pool cleaner comparison

Dolphin EON 100 vs Niya Sonar 20

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

Dolphin EON 100 and Niya Sonar 20 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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EON

Dolphin EON 100

Inground and above-ground pools up to 50 ft with steps, benches or tanning ledges that need whole-pool cordless cleaning, with a two-year warranty.

Listed price See product

View better alternatives

Niya Sonar

Niya Sonar 20

Above-ground pools up to 26 ft that need the floor cleaned without a cord.

Listed price $199

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A better alternative

What we recommend instead

Pool Express pick

Dolphin Cayman

Inground and above-ground pools up to 40 ft that need floor and wall cleaning.

$1,079

Buy Dolphin Cayman

Buying guidance

Dolphin EON 100 or Niya Sonar 20: our take

Dolphin EON 100 and Niya Sonar 20 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 EON 100 is intended for inground and above-ground pools, while Niya Sonar 20 is intended for above-ground pools. Dolphin EON 100 is rated for pools up to 50 ft; Niya Sonar 20 is rated up to 26 ft. Dolphin EON 100 cleans floor, walls, and waterline; Niya Sonar 20 cleans floor. Dolphin EON 100 lists SmartMap navigation. Niya Sonar 20 lists Sonar navigation and Dual drive motors.

Filtration and debris

Both models include Basket.

Controls and day-to-day ownership

Dolphin EON 100 provides a weekly timer and smartphone control; Niya Sonar 20 provides one-touch starts and power-supply controls. Both use cordless battery power. Dolphin EON 100 is listed at 22.1 lb versus 10 lb for Niya Sonar 20; that 12.100000000000001 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Dolphin EON 100 lists a 2-year warranty compared with 1 years for Niya Sonar 20. Dolphin EON 100 and Niya Sonar 20 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 EON 100	Niya Sonar 20
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	YesEdge	No
Scrubs the waterline	YesEdge	No
Fine-debris filter included	No	No
Large-debris filter	Yes	Yes
Automatic scheduling	YesEdge	No
Smartphone app	YesEdge	No
Anti-tangle swivel	Not listed	Not listed
3-year warranty	No	No
No recharging between cycles	No	No
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 EON 100 stands out

Dolphin EON 100 is the better fit for pools up to 50 ft.

Cleans the floor, walls and waterline instead of stopping below the tile line
Can start on a weekly schedule without a manual launch before every cycle
Adds smartphone control
Carries a 2-year warranty instead of 1 years

Where Niya Sonar 20 stands out

Niya Sonar 20 is the better fit for above-ground pools up to 26 ft that need the floor cleaned without a cord.

Weighs 10 lb versus 22.1 lb
Cleans the pool floor