Follow the instructions below on your phone's Google Chrome Browser to install this App on your Android device.

1. Click on the Menu icon (3 dots ) in the top right of your browser's header navigation bar
2. Select "Add to Home Screen" or "Install App" (which ever is displayed)
3. Click on the Add option in the popup message
4. Close down this browser window and click on the new Rollart Calc icon on your home screen