Degrii Zima Lite · Dreame Z1 Pro

Dual-ultrasonic-radar 3D path planning across floor, walls and waterline is a real capability by manufacturer design, but Degrii’s own regional listings disagree on how large a pool that planning actually covers, and this research could not reconcile the two figures.

Auto-parking at the nearest wall reduces how far a robot has to be fished from open water, but it still requires manual lifting rather than a full self-exit, so the retrieval task is reduced, not eliminated.

The robot addresses all three core pool surfaces (floor, walls, waterline) in one cycle, but an independent review found first-run cleaning fell well short of that goal and only reached roughly 90 percent effectiveness after a firmware update.

Auto-parking at the waterline reduces the retrieval task compared to a fully submerged robot, but the same review found the five-minute window before it sinks back adds a different kind of attention requirement: promptness rather than physical retrieval.

Buyers who need a single, confirmed maximum-coverage figure before purchase

Degrii's own EU and US listings state different maximum pool sizes for the same product, and this research could not resolve which applies.

Pools with tall drains, ledges or fittings near 4 in or taller

The manufacturer's documented maximum obstacle-clearance height is 3.9 in.

Buyers who require independently verified cleaning performance before purchase

No independent, non-manufacturer test of the Zima Lite was located during this research.

Buyers wanting a mature, multi-generation product line

The Z1 Pro is Dreame's first robotic pool cleaner, with no prior generation's field record to draw on.

Owners who cannot check the app promptly after a cycle

An independent review documented the unit sinking back into the water roughly five minutes after parking at the waterline if it is not retrieved.

Saltwater pools above 5,000 ppm

The manufacturer's documented saltwater rating tops out at 5,000 ppm.