With
OBD11 They now support ELM327 Dongle and I think (you will need to double check) you can use the one click apps so no subscription just having to buy credits for the things you want to do.
VCDS currently (as far as i know) does not support SFD (Only impacts you if you have a newer car ) Edit so you have to pay extra for Tokens to unlock it.
Nobody in the hobby world supports SFD2 yet So again you need to double check what you want to do and see if its possible and tell us what motor / year