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The changes I did in Openstreetmap are not visible on ÖPNVKarte. What can I do?

In general the updates of Openstreetmap data are copied within minutes. If changes do not appear immediately on the map, it might be that the server is under high load or there is a full update running. You should be patient for a while and try again the next day. Sometimes a page reload solves the issue, because cached data will be refreshed. Very few change types (for instance deletion of stop positions) are not applied automatically. In these cases a manual reimport is needed, so that there might be a delay of a few months.