Help me choose
A stronger Pool Express option
Dolphin Liberty 200 and Dolphin Nautilus EON 120d 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.
Liberty
Dolphin Liberty 200
Inground and above-ground pools that need floor and wall cleaning, without a power cord.
EON
Dolphin Nautilus EON 120d
Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance.
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 QuantumDolphin Liberty 200 or Dolphin Nautilus EON 120d: our take
Dolphin Liberty 200 and Dolphin Nautilus EON 120d 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. Dolphin Nautilus EON 120d has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin Liberty 200 cleans floor and walls; Dolphin Nautilus EON 120d cleans floor, walls, and waterline. Dolphin Liberty 200 lists Dual DC motors. Dolphin Nautilus EON 120d lists 2 active brushes and SmartMap navigation.
Filtration and debris
Dolphin Liberty 200 includes Basket; Dolphin Nautilus EON 120d includes Basket and UltraFilter. Dolphin Nautilus EON 120d has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Liberty 200 provides no fully published timer, app or remote specification; Dolphin Nautilus EON 120d provides a weekly timer and smartphone control. Both use cordless battery power.
Price, warranty and the decision
Dolphin Liberty 200 is listed at $999 and Dolphin Nautilus EON 120d at $1,199; Dolphin Liberty 200 is $200 less. Dolphin Liberty 200 lists a 2-year warranty compared with 1 years for Dolphin Nautilus EON 120d. Dolphin Liberty 200 and Dolphin Nautilus EON 120d 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 | Dolphin Liberty 200 | Dolphin Nautilus EON 120d |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Not listed | Yes |
| Smartphone app | Not listed | Yes |
| 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 Liberty 200 stands out
Dolphin Liberty 200 is the better fit for shoppers prioritizing the lower $999 starting price.
- Carries a 2-year warranty instead of 1 years
- Is listed $200 lower
Where Dolphin Nautilus EON 120d stands out
Dolphin Nautilus EON 120d is the better fit for inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes filtration for sand, pollen and other fine debris
- Has documented smartphone control
Dolphin Liberty 200 vs Dolphin Nautilus EON 120d 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 | Dolphin Liberty 200 | Dolphin Nautilus EON 120d |
|---|---|---|
| Best fit | Inground and above-ground pools that need floor and wall cleaning, without a power cord. | Inground and above-ground pools up to 50 ft that need whole-pool cordless cleaning with the least filter maintenance. |
| Starting price | $999 | $1,199 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Not listed | Up to 50 ft |
| Cleaning coverage | Floor, Walls | Floor, Walls, Waterline |
| Power | Cordless | Cordless |
| Filtration | Basket | Basket, UltraFilter |
| Scheduling | Not listed | Weekly schedule + app |
| App and remote | Not listed | App control |
| Cable | Cordless | Cordless |
| Robot weight | Not listed | 24.3 lb |
| Warranty | 2 years | 1 years |
Consider the stronger Pool Express option
Dolphin Liberty 200 and Dolphin Nautilus EON 120d 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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