The Cordaware bestinformed Mobile Client is a 64-bit application and can be downloaded from the official Google PlayStore - you need Android 6.0 or higher to install the appliation.
In order to install the Cordaware bestinformed Mobile Client, open the Google PlayStore and search for "bestinformed".
With a click on install the Mobile Client will be installed.
After the installation the Mobile Client is available to be used like any other app.
Further information regarding the registration can be found here.