Oral-B iO Series 9

Brand: Oral-B Water Flosser Advanced

The flagship of Oral-B's iO line, built around a magnetic drive that replaces the noisy gear motor of the older Pro models. The round head still oscillates and rotates, but the vibration is quieter and gentler, and the handle carries a colour OLED display with seven modes: daily clean, sensitive, gum care, whitening, intense, super sensitive and tongue cleaning. A light ring glows green at correct pressure and red when the brushing hand pushes too hard. The kit ships with a travel case that charges the handle.

Worth the money for anyone who already brushes twice a day and wants coaching on the spots they keep missing, since the app maps coverage in 3D. Less sensible as a first electric brush: the heads cost noticeably more than standard Oral-B refills, and the display and Bluetooth add little for a person who simply wants clean teeth.