Smart Contact Manager allows users to transfer contacts from one Android phone to another without having to manually enter them. This is made possible by the app using a technique called "backup and restore".

This app allows users to take a backup of their contacts, which can be restored later on. It also allows users to use the same email and password to log in to the app, so they don't need to remember their credentials.

It's also possible to create a backup of your contacts that can be restored on a different device, even if that device no longer has the app installed.