I believe the SkyDemon provider announced they will stop this service in less than a year. SkyDemon is looking for another provider to replace them.
To be confirmed.
That said, in France we only need to call the BRIA in Bordeaux to file a flight plan. So I haven’t used the feature in SkyDemon so far… It’s simpler to make a phone call, but of course the flight must either start in France or end in France. For example, you can call before departing England to activate customs services in France. You must do this at least 1 hour before departure.
I personally use the really well-made DFS portal, among other things for filing flight plans.
I created a hierarchy/organization in the portal for how I store flight plans. With one click I can then adjust a plan for the planned flight and, if needed, save it. That works absolutely great. Also the notification function via SMS or email, or both…
→ so for me, of course, also nice to have… and yes, a feature another app can do… But not a priority. Hermann would need a lot of time to implement it, time that is missing elsewhere. → my opinion!