Hi Willy,
according to your interest in tests of Kurviger Tourer perhaps you should consider to invest the incredible high amount of 2,49€ 
for a one month subscription.
And if you really think that this is too much money, you can cancel it within 7 days without any costs …
Or you are really wasteful and give a small fortune (9,99€) for one year and improve the Kurviger development with this generous support.
More details you can find in
And from my point of view: It was my exception that the Pro app can navigate with the .Kurviger generated by Kurviger Tourer, because that is the native format and the app can follow the turn instructions in it without doing a new routing.
And its really quite simple to share a file via mail, Google drive, Bluetooth, WiFi, USB cable, USB Stick, SD card, …
Additionally Wolfgang @zaphod_42 seems to have done a test - I see no reason to doubt this.
And due to the distributed development of web and app it is inavoidable that new features are not implemented in parallel - the alternative would be to retain new options - I can not imagine that anyone prefers that option. By the chosen way improvement (and perhaps bugfixing) can be done already with web variant, this might also save loops and effort in app development.
Regards Markus