Oral-B Genius 8900
Oscillating toothbrush
Question about Oral-B Genius 8900
Is the app meant for two people?
Helpful answer
I am not quite clear what you actually want to ask.
The app can be installed on a smartphone - how many people then use this smartphone does not really matter to the app.
As far as I have seen, one handset can be connected to one app and vice versa.