The Mevo app can be downloaded for free from the App Store.
Simply go to the App Store on your iPhone. Tap the search icon and type in 'Mevo.' The results should look like this:
Tap the 'Get' button next to the app to start the download. You may be prompted to enter your iCloud password.
When the download finishes, the Mevo app will be available on your home screen and is ready to use.