Robotic pool cleaner comparison

Clear S vs Dolphin Oasis Z5i

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

Pool Express pick

Our pick: Clear S

Clear S is the Pool Express pick in this matchup. Clear S includes a 59 ft cable with anti-tangle swivel. Clear S's documented advantages include ultraFilter fine filtration.

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Pool Express pick

CLEAR

Clear S

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

Current price $1,749MSRP ~~$2,749~~ Save $1,000

Buy Clear S

Oasis

Dolphin Oasis Z5i

Inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.

Listed price See product

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Pool Express pick

Why Clear S is our pick

Pool Express pick

Clear S

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

$1,749

Buy Clear S

Buying guidance

Clear S or Dolphin Oasis Z5i: our take

Clear S 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. Clear S lists 2 active brushes, Intelligent navigation (C9 microprocessor), and Quad (2 pump + 2 drive) motors. Dolphin Oasis Z5i lists CleverClean navigation.

Filtration and debris

Clear S includes UltraFilter; Dolphin Oasis Z5i includes Basket and UltraFilter. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability. Dolphin Oasis Z5i has the better documented path for bulky leaves and larger debris.

Controls and day-to-day ownership

Clear S provides a weekly timer, smartphone control, and included remote control; Dolphin Oasis Z5i provides a weekly timer and smartphone control. Clear S uses a 59 ft corded cable with an anti-tangle swivel, while Dolphin Oasis Z5i uses continuous corded power. Clear S is listed at 27.6 lb versus 26.7 lb for Dolphin Oasis Z5i; that 0.9000000000000021 lb difference matters when lifting the robot from the pool.

Price, warranty and the decision

Each lists a 3-year manufacturer warranty. Pool Express pick: Clear S. Clear S includes a 59 ft cable with anti-tangle swivel. Clear S's documented advantages include ultraFilter fine filtration. Choose Dolphin Oasis Z5i when it is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.

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	Clear S	Dolphin Oasis Z5i
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	Yes	Yes
Scrubs the waterline	Yes	Yes
Fine-debris filter included	Yes	Yes
Large-debris filter	No	YesEdge
Automatic scheduling	Yes	Yes
Smartphone app	Yes	Yes
Anti-tangle swivel	Yes	Yes
3-year warranty	Yes	Yes
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 Clear S stands out

Clear S is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

59 ft cable with anti-tangle swivel
UltraFilter fine filtration

Where Dolphin Oasis Z5i stands out

Dolphin Oasis Z5i is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning with app scheduling.

Includes a large-debris bin or bag for leaves
Weighs 26.7 lb versus 27.6 lb