Help me choose
A stronger Pool Express option
Aquabot X4 and Dolphin Premium 40 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.
Aquabot
Aquabot X4
Inground and above-ground pools up to 60 ft that need floor, wall and waterline cleaning.
Premium
Dolphin Premium 40
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling and a caddy.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumAquabot X4 or Dolphin Premium 40: our take
Aquabot X4 and Dolphin Premium 40 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
Aquabot X4 is intended for inground and above-ground pools, while Dolphin Premium 40 is intended for inground pools. Aquabot X4 is rated for pools up to 60 ft; Dolphin Premium 40 is rated up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Aquabot X4 lists 1 active brush and Intelligent navigation. Dolphin Premium 40 lists 2 active brushes and CleverClean navigation.
Filtration and debris
Aquabot X4 includes Basket; Dolphin Premium 40 includes Basket and UltraFilter. Dolphin Premium 40 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Aquabot X4 provides a weekly timer; Dolphin Premium 40 provides a weekly timer and smartphone control. Aquabot X4 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Premium 40 uses continuous corded power. Aquabot X4 is listed at 40 lb versus 18.6 lb for Dolphin Premium 40; that 21.4 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Aquabot X4 is listed at $747 and Dolphin Premium 40 at $1,629; Aquabot X4 is $882 less. Each lists a 2-year manufacturer warranty. Aquabot X4 and Dolphin Premium 40 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 Premium 40 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Not listed | Yes |
| Anti-tangle swivel | Yes | Yes |
| 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.
- Is rated for pools up to 60 ft
- Is listed $882 lower
Where Dolphin Premium 40 stands out
Dolphin Premium 40 is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling and a caddy.
- Includes filtration for sand, pollen and other fine debris
- Uses 2 active brushes instead of 1
- Has documented smartphone control
- Weighs 18.6 lb versus 40 lb
Aquabot X4 vs Dolphin Premium 40 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 | Aquabot X4 | Dolphin Premium 40 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 60 ft that need floor, wall and waterline cleaning. | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling and a caddy. |
| Starting price | $747 | $1,629 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Up to 60 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Basket | Basket, UltraFilter |
| Scheduling | Weekly schedule | Weekly schedule + app |
| App and remote | Not listed | App control |
| Cable | 60 ft with anti-tangle swivel | Not listed |
| Robot weight | 40 lb | 18.6 lb |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Aquabot X4 and Dolphin Premium 40 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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