Thanks for the review @crokkon.
I tried to follow your previous remarks and widen the analysis by querying the blockchain. It is still on a basic level, but some interesting information are gathered. I have @paulag to thanks for the queries, although I used only a part of that data.

On your remark about the changed information about the app when another interface is used I must say that I haven't thought about that. But this is an issue and at the moment, I can't tell a way to solve it. Probably the numbers of those is not that big and don't influence the overall results.
But still something to think about.