New to BMW after decades on VAG.

I just got a 2016 (US) M235i convertible. NO NAVIGATION, 6.5" screen. I'd like to add CarPlay but the terminology is confounding. I can't afford BimmerTech so I need to go with an off-brand option.

I have been told I have ENTRYNAV (which is confusing because my system does not have Navigation at all.

Is ENTRYNAV an alternative to NBT, or a type of NBT? So when picking a CarPlay adapter, am I OK to say I have NBT?

Any help would be appreciated!

Dave