To access the Mobile App open the following link from a browser on your mobile or tablet:
You can save the mobile app to your home screen easily by following these steps:
iOS
When you have the web page open, click on the "..." (red box below) at the bottom of the screen, followed by 'Share'.

Now find the option 'Add to Home Screen' in the panel. In the last dialog 'Add to Home Screen' ensure 'Open as Web App' is enabled. Then just press 'Add'.
Android
Click the 3 small dots in the upper right corner. Find and click on the option ‘Install’ on Chrome, and the option ’add to homescreen’ on Firefox.

