This is the way I understand:
Collections are temporary and clear when you close the app.
SaveData saves data in encrypted private powerapps storage that can be acessed later by the same app with the LoadData function.
Export function saves encrypted data to a zip file (in the local file system) that can be opened with the Import function by the same app or another powerapp, but not anyway else. In PCs the zip file is available in the local file sytem. I dont know where the file would be in na Iphone.
Export and Import already work fine, but SaveData and LoadData don't.
Excel can be used as the cloud datasource but requires an internet connection to be updated. Offline scenarios require local data that can be updated locally, stored and used to sync to the datasource when a connection is available.
For that to work we need local storage within the app (save and load being easier to manage and less prone to erros than export import to local file system) and a sync function, that would compare local storage to online storage and do the inserts, updates and deletes required.
Question: Is save and load data already available? Will we be able the to sync the local storage to the online storage in the near future?
Marcelo