Dolphin M400 Robotic Pool Cleaner vs Maytronics Dolphin Premier

Both clean floor, walls and waterline in pools up to 50 feet, but they suit different owners. The M400 adds three brushes, app control and fine cartridge filtration, so it handles fine dirt and algae better and lets you schedule or spot clean from your phone. The Premier is lighter, has a longer 3-hour cycle, a leaf bag for twigs and heavy debris, and a 3-year warranty, but no app. Owners of the M400 report 5 to 10+ years of use and praise its scrubbing, though some find it heavy and note it gets stuck on steps and ledges. The Premier has far fewer owner ratings, so its track record is thinner.

• Choose the Dolphin M400 if you want app scheduling, three brushes for scrubbing walls and waterline, and fine filtration that catches small particles.
• Choose the Dolphin Premier if you want a lighter cleaner, a leaf bag for twigs and heavy debris, a longer cycle and a 3-year warranty, and you don't need app control.