I hate to give the author of this tool any despair: if you think managing your Wohnsitzanmeldung is hard, wait until you decide to move away from Germany (to another country) and attempt to sever/cancel your contracts. The cancellation process is nightmare mode.
The last time I had to visit a government office for something routine... well, I actually don't recall when that last was. Most things are done online, with only a small a few requiring me to mail something out as well.
I guess this is also location dependent; a small US town probably has less digitization than a large US city.