Help me choose
A stronger Pool Express option
Aquabot X4 and Dolphin Nautilus AG 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.
Aquabot
Aquabot X4
Inground and above-ground pools up to 60 ft that need floor, wall and waterline cleaning.
Nautilus
Dolphin Nautilus AG
Above-ground and small inground pools up to 30 ft that need the floor vacuumed.
What we recommend instead
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
$1,079
Buy Dolphin CaymanAquabot X4 or Dolphin Nautilus AG: our take
Aquabot X4 and Dolphin Nautilus AG 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 Nautilus AG is intended for above-ground pools. Aquabot X4 is rated for pools up to 60 ft; Dolphin Nautilus AG is rated up to 30 ft. Aquabot X4 cleans floor, walls, and waterline; Dolphin Nautilus AG cleans floor. Aquabot X4 lists 1 active brush and Intelligent navigation. Dolphin Nautilus AG lists 1 active brush and CleverClean navigation.
Filtration and debris
Both models include Basket.
Controls and day-to-day ownership
Aquabot X4 provides a weekly timer; Dolphin Nautilus AG provides one-touch starts and power-supply controls. Aquabot X4 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Nautilus AG uses continuous corded power. Aquabot X4 is listed at 40 lb versus 14.6 lb for Dolphin Nautilus AG; that 25.4 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Aquabot X4 is listed at $747 and Dolphin Nautilus AG at $568; Dolphin Nautilus AG is $179 less. Aquabot X4 lists a 2-year warranty compared with 1 years for Dolphin Nautilus AG. Aquabot X4 and Dolphin Nautilus AG 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 | Aquabot X4 | Dolphin Nautilus AG |
|---|---|---|
| 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 | Not listed | No |
| Anti-tangle swivel | YesEdge | No |
| 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 pools up to 60 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
- Uses an anti-tangle swivel cable
- Carries a 2-year warranty instead of 1 years
Where Dolphin Nautilus AG stands out
Dolphin Nautilus AG is the better fit for shoppers prioritizing the lower $568 starting price.
- Is listed $179 lower
- Weighs 14.6 lb versus 40 lb
Aquabot X4 vs Dolphin Nautilus AG 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 Nautilus AG |
|---|---|---|
| Best fit | Inground and above-ground pools up to 60 ft that need floor, wall and waterline cleaning. | Above-ground and small inground pools up to 30 ft that need the floor vacuumed. |
| Starting price | $747 | $568 |
| Pool type | Inground, Above-ground | Above-ground |
| Maximum pool length | Up to 60 ft | Up to 30 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor |
| Power | Corded | Corded |
| Filtration | Basket | Basket |
| Scheduling | Weekly schedule | One-touch start |
| App and remote | Not listed | Power-supply controls |
| Cable | 60 ft with anti-tangle swivel | Not listed |
| Robot weight | 40 lb | 14.6 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Aquabot X4 and Dolphin Nautilus AG 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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