I have never seen a users manual for any app the Church has produced, so I do not expect to see one for this app. I do not know why anyone would expend "substantial effort" to stand up an interim substitute. There are already plenty of materials available for the program to function without using the app at all, including goal setting.
There has not been an app for any previous activity programs, and things have managed to work. When the app arrives, it may certainly be a help, but none of our deacons will have phones and be able to use it anyway, so we are moving ahead on that basis for all of the youth at the moment.
It will come when it comes, and be a cherry on top of the hot chocolate and whipped cream. Even the youth are able to relate to that metaphor.