Robotic pool cleaner comparison

Dolphin T35 vs Niya Tracker 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

Dolphin T35 and Niya Tracker 15 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.

Buy Dolphin Cayman Compare every robot

T-Line

Dolphin T35

Inground pools that need floor, wall and waterline cleaning, with fine debris.

Listed price $1,199

View better alternatives

Niya Tracker

Niya Tracker 15

Above-ground pools up to 20 ft that need the floor vacuumed without a cord.

Listed price $199

View better alternatives

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 T35 or Niya Tracker 15: our take

Dolphin T35 and Niya Tracker 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

Dolphin T35 is intended for inground pools, while Niya Tracker 15 is intended for above-ground pools. Niya Tracker 15 has a published maximum pool length of 20 ft; the other model does not have a verified length in our source material. Dolphin T35 cleans floor, walls, and waterline; Niya Tracker 15 cleans floor. Dolphin T35's documented cleaning system includes 2 active brushes and CleverClean navigation.

Filtration and debris

Dolphin T35 includes Basket and UltraFilter; Niya Tracker 15 includes Basket. That gives Dolphin T35 the clearer documented edge for fine silt, pollen and sand.

Controls and day-to-day ownership

Dolphin T35 provides a weekly timer and smartphone control; Niya Tracker 15 provides one-touch starts and power-supply controls. Dolphin T35 uses a 60 ft corded cable with an anti-tangle swivel, while Niya Tracker 15 uses cordless battery power.

Price, warranty and the decision

Dolphin T35 is listed at $1,199 and Niya Tracker 15 at $199; Niya Tracker 15 is $1,000 less. Dolphin T35 lists a 2-year warranty compared with 1 years for Niya Tracker 15. Dolphin T35 and Niya Tracker 15 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 T35	Niya Tracker 15
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	YesEdge	No
Scrubs the waterline	YesEdge	No
Fine-debris filter included	YesEdge	No
Large-debris filter	Yes	Yes
Automatic scheduling	YesEdge	No
Smartphone app	YesEdge	No
Anti-tangle swivel	Yes	Not listed
3-year warranty	No	No
No recharging between cycles	YesEdge	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 T35 stands out

Dolphin T35 is the better fit for owners who put smartphone control first.

Cleans the floor, walls and waterline instead of stopping below the tile line
Includes filtration for sand, pollen and other fine debris
Can start on a weekly schedule without a manual launch before every cycle
Adds smartphone control

Where Niya Tracker 15 stands out

Niya Tracker 15 is the better fit for shoppers prioritizing the lower $199 starting price.

Is listed $1,000 lower
Cleans the pool floor