Robotic pool cleaner comparison

Aquabot X4 vs Dolphin T25

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

Aquabot X4 and Dolphin T25 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.

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Aquabot

Aquabot X4

Inground and above-ground pools up to 60 ft that need floor, wall and waterline cleaning.

Listed price $747

View better alternatives

T-Line

Dolphin T25

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

Aquabot X4 or Dolphin T25: our take

Aquabot X4 and Dolphin T25 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 and above-ground pools. Aquabot X4 is rated for pools up to 60 ft; Dolphin T25 is rated up to 33 ft. Aquabot X4 cleans floor, walls, and waterline; Dolphin T25 cleans floor and walls. Aquabot X4 lists 1 active brush and Intelligent navigation. Dolphin T25 lists 1 active brush.

Filtration and debris

Aquabot X4 includes Basket; Dolphin T25 includes Basket and UltraFilter. Dolphin T25 has the clearer documented edge for fine silt, pollen and sand.

Controls and day-to-day ownership

Aquabot X4 provides a weekly timer; Dolphin T25 provides a weekly timer and power-supply controls. Aquabot X4 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin T25 uses a 50 ft corded cable. Aquabot X4 is listed at 40 lb versus 15 lb for Dolphin T25; that 25 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Aquabot X4 is listed at $747 and Dolphin T25 at $849; Aquabot X4 is $102 less. Each lists a 2-year manufacturer warranty. Aquabot X4 and Dolphin T25 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	Aquabot X4	Dolphin T25
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	Not listed	No
Anti-tangle swivel	Yes	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 Aquabot X4 stands out

Aquabot X4 is the better fit for shoppers prioritizing the lower $747 starting price.

Cleans the floor, walls and waterline instead of stopping below the tile line
Is rated for pools up to 60 ft
Is listed $102 lower

Where Dolphin T25 stands out

Dolphin T25 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
Weighs 15 lb versus 40 lb