thx Richard.
I see the problems for OSM and the Tile Server.
I am not a company, just an interested private person. Actually, i just wrote the app for me, and now think, maybe also others are interested.
On the other hand... What is the aim of OSM, if people are urged to NOT use it?

I sure will not get a paid Tile Server or anything like this, cause I myself get no money at all out of this...
Anyway, at now an interesting discussion. I will wait for making the app public until I get some "clear ok" or "no" for that...

danke für die freundliche Begrüssung.
amenity=doctors wird auf der Karte leider gar nicht dargestellt :-(
Ich lese jetzt mal Eure netten Links durch, man wird ja täglich schlauer und besser (hoff ich zumindest)