Best ODB2 adapter (ELM327) for Android pairing?

Hello,

I was looking into picking up a dongle for general diagnostic information. I have a cheap scanner but would like to be able to see more information.

I would like to use AndrOBD since it's open source and on F-Droid; it is compatible will all ELM327 bluetooth adapters.

I was also wondering if there is some type of security feature/password to avoid having other people possible connect to it. I know it is probably a non-issue, but I was just curious.

Having it available on Amazon is also a plus due to Prime.


Thanks

If you have an android just get OBDEleven. Its does pretty much everything VCDS can do now. But otherwise I have an BAFX adapter which has worked pretty well for use on other cars and ive used torque pro on it for my car but it still cant compare to VCDS or OBDeleven since they cant read VAG modules or read any of that diagnostic info.