To start using the d!nk app for Android you will need to install the app first.
Go to the Google Playstore, search for 'SalesMatik' and click on the 'Install'-button.
When the installation has completed, you will find the SalesMatik app on the home screen of your device.
After you installed the app, you can now login.
As a note:
Please note the d!nk app is compatible with Android 4.1 and above.