First issues - then excellent service - now issues solved
Besides that the app has an excellent design there seemed to be a problem with app-breakdowns at first. So I deleted the app. But the designer of the app asked what he could do to solve the issue (!!). So I told him about the problem and he was extremely patient, helpful and really interested in the issue. At the end, the problem was solved (as far as I can say…). And the app works without any problems any more.