Help me choose
A stronger Pool Express option
Dolphin Advantage Ultra and Dolphin Oasis Z5i 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.
Advantage
Dolphin Advantage Ultra
Inground pools up to 50 ft that need floor, wall and waterline cleaning.
Oasis
Dolphin Oasis Z5i
Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.
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 Advantage Ultra or Dolphin Oasis Z5i: our take
Dolphin Advantage Ultra and Dolphin Oasis Z5i 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 pools. Both are rated for pools up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Oasis Z5i's documented cleaning system includes CleverClean navigation.
Filtration and debris
Dolphin Advantage Ultra includes Basket; Dolphin Oasis Z5i includes Basket and UltraFilter. Dolphin Oasis Z5i has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Advantage Ultra provides a weekly timer and power-supply controls; Dolphin Oasis Z5i provides a weekly timer and smartphone control. Dolphin Advantage Ultra uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin Oasis Z5i uses continuous corded power.
Price, warranty and the decision
Dolphin Advantage Ultra lists a 2-year warranty compared with 3 years for Dolphin Oasis Z5i. Dolphin Advantage Ultra and Dolphin Oasis Z5i 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 Advantage Ultra | Dolphin Oasis Z5i |
|---|---|---|
| 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 | No | YesEdge |
| Anti-tangle swivel | Yes | Yes |
| 3-year warranty | No | YesEdge |
| 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 Dolphin Advantage Ultra stands out
Dolphin Advantage Ultra is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning.
- 60 ft cable with anti-tangle swivel
- Top-load filter basket
Where Dolphin Oasis Z5i stands out
Dolphin Oasis Z5i is the better fit for owners who put smartphone control first.
- Includes filtration for sand, pollen and other fine debris
- Adds smartphone control
- Carries a 3-year warranty instead of 2 years
Dolphin Advantage Ultra vs Dolphin Oasis Z5i 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 Advantage Ultra | Dolphin Oasis Z5i |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning. | Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling. |
| Starting price | $1,099 | See product |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 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 | Power-supply controls | App control |
| Cable | 60 ft with anti-tangle swivel | Not listed |
| Robot weight | Not listed | 26.7 lb |
| Warranty | 2 years | 3 years |
Consider the stronger Pool Express option
Dolphin Advantage Ultra and Dolphin Oasis Z5i 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.
More robotic pool cleaner comparisons
Keep comparing without rebuilding the same specification table yourself.
Clear UV vs Clear S
Pool Express pick: Clear UV
Dolphin Quantum vs Clear S
Pool Express pick: Dolphin Quantum
Dolphin Premier vs Dolphin Sigma
Pool Express pick: Dolphin Premier
Dolphin Premier vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Sigma vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Cayman vs Dolphin Escape
Pool Express pick: Dolphin Cayman