Bump.
I got an idea for an app yesterday and out of curiosity I want to see if its possible. I've been searching for awhile now and I found some good info but I'm also finding mixed answers so hopefully you guys can help me out with this one.
Example: Could you make an app that the user installs, the app can see all of the other apps the person has on their phone, and recommend other apps to the person based on which ones it finds?
Could this app not just recognize the other apps, but can it automatically pull data from them? Could it pull data from someone's foursquare app and be able to tell what restaurant they had been to that day?
Some of the articles I found show how a certain apps are able to interact with each other, but I'm not sure how much data they can actually pass to each other and also whether you need to create some type of "permission" between app A and app B to do this or if you can just grab data from any app installed on the user's phone.
PS. Can the above be accomplished with an android as well?