Philips Sonicare FlexCare+Sonic electric toothbrush

How do electric and manual toothbrushes differ?

Can I use my Sonicare AirFloss charger to charge my toothbrush? 

How does the brushing guidance work in the Sonicare app?

In which countries is the Sonicare app available?

Why is there a gap between my brush head and handle?

My brush head is difficult to attach or remove.

I cannot connect my toothbrush to the Sonicare app

My Sonicare toothbrush is not vibrating

My Sonicare toothbrush is not charging

My brush head falls off my Sonicare toothbrush