Signing in to the Diarize Me App is a very similar process to that of the web console.
First, make sure you have downloaded the latest version of the app:
Apple App Store: https://itunes.apple.com/za/app/diarize-me/id1062681991?ls=1&mt=8
Google Play Store: https://play.google.com/store/apps/details?id=com.diarizeme.diarizeme
When you first open the Diarize Me App, you will be prompted for your email address and password. These are the details you would have received when you signed up for your free trial account or set once you had logged in from the web console.
Once you have entered your email address and password, tap on the 'Login' button.