Robotic pool cleaners look simple gliding around the pool, but several systems work together to deliver a deep clean.
Suction and Scrubbing
At its core, a robot pairs motor-driven suction with active scrubbing brushes. The brushes dislodge stuck-on grime, algae, and biofilm from the floor, walls, and waterline, while the internal pump vacuums the loosened debris into the machine. This scrub-and-suction combo is what makes robots outperform suction- and pressure-side cleaners, which only vacuum loose debris.
Onboard Filtration
Unlike other cleaners, a robot is self-contained: it filters debris into its own onboard cartridge or bag and returns clean water to the pool, so it does not rely on your pool's pump or plumbing (which is why it cannot vacuum to waste). Fine media like NanoFilters let it capture microscopic silt and algae, not just leaves.
Smart Navigation and Efficiency
Premium models use gyroscopic sensors and mapping to scan the pool and plan efficient routes, plus weekly timers and app control. They run on stepped-down low voltage and sip electricity. For a deeper technical dive, read our full guide on how a pool robot works. To see it all in action, check out a top model like the Dolphin Sigma or browse our best robotic pool cleaners.
