If I build a Meteor App. for mobile use, will the app be able to retain data that the user has entered, i.e. if they enter something, then restart their phone it will still be locally held on the phone and retrievable by the app? If so, what is the mechanism - is it mini-Mongo?
I think you will need to take a look at ground:db. Minimongo will tolerate loss of connection, but not loss of app.