Philips Sonicare DiamondClean 9000Rechargeable toothbrush

How do I enable or disable the pressure sensor on my Sonicare?

Can I sync the Sonicare app with the Apple Health app?

Which brush head fits my Sonicare toothbrush?

Which devices are compatible with the Sonicare App/Sonicare for Kids App?

How do I change the intensity settings on my Sonicare toothbrush?

My brush head is difficult to attach or remove.