How to Choose a Robotic Pool Cleaner

Match the robot to your pool type and length first, then decide between a corded robot on a weekly timer and a cordless robot you charge and lift out yourself. After that, compare which surfaces it cleans, how fine its filter is, real runtime, and the total cost including filters and safety history.

Researched by the robotsforthat team · updated Oct 14, 2026 · How we research

Start with your pool type and size

Check whether the robot supports your pool. Several popular models are in-ground only, including the Dolphin Sigma, Dolphin Premier, Polaris VRX iQ+ and Polaris Freedom Plus, while the Dolphin Cayman, Dolphin Nautilus EON 120d and Beatbot Sora models also list above-ground pools.

Corded makers rate size by pool length, for example up to 40 ft for the Cayman and 50 ft for the Premier and Sigma. Cordless makers usually quote floor area per charge, such as 1,614 sq ft for the Aiper Scuba V3 or 3,229 sq ft for the Beatbot Sora 10. Pick a robot rated comfortably above your pool rather than right at the limit.

Corded or cordless

A corded robot runs off a power supply at the pool edge, keeps full suction for the whole cycle, never needs charging, and can run on a weekly timer, so it can stay in the pool. The trade off is a long floating cable to manage; PCWorld notes the Polaris VRX iQ+ must plug into a GFCI outlet and cannot use an extension cord.

A cordless robot has no cable to tangle, but you lift it out and charge it after every run. The Pool Nerd, which prefers corded robots, says most cordless units run 60 to 90 minutes in real conditions, take several hours to charge, and lose runtime as the battery ages. Choose cordless if you have no convenient outlet or a small, low debris pool.

Floor, walls, waterline and surface

Almost every robot here cleans the floor and walls; check the spec sheet for waterline scrubbing. Maytronics, for example, does not list waterline scrubbing for the Cayman.

Steps, sun shelves and the water surface are where models differ most. The Beatbot Sora 70 and Dolphin Nautilus EON 120d are rated for ledges as shallow as 8 inches, while the Beatbot Sora 10 needs 12 inches and PCWorld found it missed debris on steps. Only some models skim the surface, such as the Beatbot AquaSense 2 Ultra and Sora 70.

Filters and what they catch

Filter rating decides whether a robot traps fine sand and algae or just leaves and bugs. Many cordless robots ship with a 150 micron basket, which The Smart Home Hookup says will not trap algae or fine silt; Beatbot and others sell finer 3 micron baskets as extras.

Also look at how easy the filter is to empty. PCWorld found the fine backwash filter on the Dolphin EON 120d trapped debris very well but was a huge pain to clean, and leafy pools benefit from a large top load basket or bag.

Runtime, charging and retrieval

Treat cordless runtime claims as best case. EFTM measured the WYBOT C2 Vision running roughly 100 to 185 minutes depending on mode, and PCWorld got a little over 2.5 hours from the Polaris Freedom Plus on its most thorough setting. Charge times listed by makers run from about 3 to 5 hours.

Retrieval matters every day with a cordless robot. Look for waterline parking, a remote or app recall, and a sane weight: the Beatbot AquaSense 2 Ultra weighs about 29 lb dry, and Reviewed found the Sora 70 sinks and cannot be recalled if its battery dies in the water. App connections generally drop once the robot is underwater.

Total cost and safety history

Add filters and accessories to the sticker price. Maytronics lists ultra fine panels for the Premier at $79.99 and Leslie's lists an optional sand and silt canister for the Polaris VRX iQ+ at $99.99. Running cost for a corded robot is small: Bob Vila estimated about 5 cents per hour for the Dolphin Premier.

Warranty length varies from 1 to 3 years across the models here. Check the CPSC recall list before you buy: Aiper recalled the Elite Pro in 2023 and the Seagull Pro in 2025, and Wybotics recalled the Osprey 700 Max and S1 in 2026, all for battery overheating or fire hazards. Charge any cordless robot on a hard surface away from the house and follow the maker's charging instructions.

What to skip

Skip robots that do not list your pool type, a robot rated right at your pool's size limit, and cordless models if you will not lift and charge one after every run.

Be wary of star ratings alone. The Pool Nerd cites Fakespot grades of F for some Aiper, Beatbot and Winny listings, which flags review inconsistency rather than product quality, so lean on independent tests.