Niya Tracker Pool Cleaners

The Tracker 15 is the seven-pound starter: one button, a one-hour cycle, the floor of an above-ground pool up to 20 ft. The Tracker 25 is a ten-pound floor cleaner with sonar navigation and brushless motors for pools to 26 ft. The Tracker 35 and Tracker 55 share a 19 to 20 lb tracked body with two active brushes and dual drive motors that climb the walls and scrub the waterline in pools up to 40 ft, a bigger pool than any Sonar is rated for.

Between the 35 and the 55 the hardware is the same class; the 55 adds a Bluetooth app so you can pick a cleaning mode from your phone before you drop it in. Like every Niya, the Trackers use a single coarse top-load basket and have no timer, so they suit pools with leaves and everyday debris rather than algae or fine silt. If you need a weekly schedule or ultra-fine filtration, look at a Dolphin Liberty or Dolphin EON cordless robot.