what radio do I have?

I have a 2014 Tacoma and was wondering how to tell what radio I have in it? And also is there a way to download apps such as the maintance app or even navi system?

 

If you have the touch screen but you don't have navigation, you probably have the Entune Audio Plus version.

Nope, you're locked in with whatever version of the in-dash system you have. The only way to get navigation would be to buy a new unit and replace the one you currently have (which is actually pretty easy to do).