Question Privacy Filter

I want an app which filters out the private info on my phone.

I wanted a cheap taxi so I tried to download the Lyft app and the app wanted the contacts, photos, camera and about a dozen things in all. I have run into this before and it is inconvenient.

I am thinking of writing such an app, an app which will hide information you see no need to give out.

Before starting I want to know if the app has been written already or if it is even possible without physical modification.