Hello Michele,
Are you still working on the Family Gem app? For a long time I have seen no changes on the website or answers given on the googlegroup.
I have found a way to still use your app on my Galaxy A14 5G after it crashed so badly.
Now I regularly save a zip file and upload it again in the app afterwards. As the app still shuts down sometimes due to a error in the json (and then losing possibly the whole tree).
Will a new update come which might solve this problem?
With sincere gratitude, Caroline