If you have an iPhone, visit the App Store.
If you have an Android, visit Google Play.
Search for LoopPay.
Note for Android users: If you already have the app and for some reason you can't see the App in Google Play, there is a good chance your phone is not running the OS (Operating System) version required for the App to run successfully on your phone. Check out the LoopPay Compatibility page for more information.
Once you download the App, the stores will let you know when an update is available.