Minimongo data is persisted to IndexedDB which means it will work for any app that can use IndexedDB.
For mobile, this means if you’re using Cordova (which uses a web view) or it’s a PWA, it will persist the data as expected when the user closes the app. When they come back, it will first load the persisted data and then perform the server sync if needed.
For those interested in creating PWAs with Meteor, I published a starter kit here: