App Caller is an android application that helps you get an immediate response from other users to launch an app, share links and photos.
When you start the app for the first time you can choose your photo and display name that will show to others.
Express Setup - chooses all your phone accounts as your main point of contact, like a phone number, and all your contacts will be uploaded and you will automatically add all your contacts once they join.
Advance Setup - choose which account you can be reached at (need at least 1) and choose whether to upload your contacts.
All of these settings can be changed later and you can also delete all your data under settings by clicking permanently delete account.