Very old IT professional, (I started on punch tape and UI was a teletype). Now semi retired and trying my hand at writing a mobile app. Have got one on IOS and google app stores “LymEx”. Simple app for people with lymphoedema secondary to Cancer metastasis. (includes me). I tried various platforms that develop for IOS and Android. Thunkable has impressed me, but X has some interesting foibles. But I will continue if only to stop dementia setting in.