Hi @geoeki and welcome to the forum!
We added it temporarily to the beta app for testing purposes. Before the full release we’ll change how we handle proprietary licenced geoids, but right now we needed to make sure that the system works.
2.) could you also add the official Austrian vertical ref. system, which is publicly available here (here’s also the documentation , which is held in German, but you can get the details from the table I think even without understanding German). In case you need the geoid undulation (for GRS80 and Bessel) too, it’s freely available here .
We should have that added in the upcoming release this Tuesday (it might become available slightly later due to the app store review process).
3.) Wouldn’t it be easier for you to just enable own geoid file import as s csv file, so users can bring in their own geoid files in case those are bound to a commercial license?
Even though we might have to do that eventually, the unfortunate answer is that it wouldn’t really be easier. That way we will have to make the app handle erroneus, incomplete or somehow broken grid file. We also won’t be able to make sure we provide accurate results.
Hope this answers your questions 