You don’t need a dashboard. Think of it as just a database. And then other apps interact with it. On my android phone I have davx5 which does all the syncing of things like calendar and contacts. Setting up and syncing with davx5 is the easy bit. The hard bit is getting authentication working and creating the databases. Mine works perfectly but I couldn’t tell you how I set it up. If I want to add another calendar or contacts list to it Id have to go and figure it all out again.