Homer lets you find out which apps your friends are using
If you do want to try an app that you see on your friend's list, tap on the icon and you will be taken to the listing on the App Store, so that you can load it immediately on your phone or tablet. It seems that Homer has the whole privacy issue taken care of as well. Apps that you don't want anyone to know that you are using, can be hidden from your friends. Your profile page shows your four favorite apps as guessed at by Homer. You can change those manually, if you so desire. And buttons on the bottom of the screen quickly get you back to your phone at anytime.
Homer was created by PayPal co-founder Max Levchin and the HVF team. Currently, the app is available only for iOS devices in the U.S. and there is no talk yet about a version for Android or Windows Phone.
source: Homer via PCMag