sonicare is quite pricey, at least the replacement, definitely go look for cheaper replacement heads, those should work. or you can look into off-brand ones that are even cheaper.

I've had my sonicare for years but last I checked replacement heads were $30 for a pack of 3 on amazon.

So I are is amazing. However, like everything with a battery, it starts to deteriorate after a year and dies after 2 years. I love them though. If you go from a sonic are to an oral b, it feels like you’ve gone from the brush of the future, to using a broken lawnmower in your mouth.

I have used both and my wife too. The Sonicare is a fucking garbage toothbrush. The oral-b is superior in every way. Speaking with my dentist and prior dentists, they also agree. The little buzzing bullshit doesn't do a near good enough job in removing as mechanical motion of the oral-b

I use a special kind of wooden stick with some fibres which clean my teeth.

No battery, phone app, or massive landfill of small mechanical toothbrush parts.

Edit: although I could also try the whiskey option...

I wouldn't trust aftermarket china stuff that goes inside or outside my body.