I don't see how you can trust any of these sorts of privacy apps without compiling and side-loading them yourself. Even then, it's risky on a device you really

I don't see how you can trust any of these sorts of privacy apps without compiling and side-loading them yourself. Even then, it's risky on a device you really don't control (f.e. Are we sure that the wi-fi radio that the FCC requires manufacturers to isolate from apps can't itself backdoor the device? Will we always be sure that the app developer won't ever update the software in a nefarious way?)