I\'m developing a app that uses Firebase\'s Firestore to send data to the web. One of the functions of the app is being able to save data in the device while being offline a
I think the currrent answer is outdated. According to the firebase documentation, offline persistentence is enabled by default for Android and iOS. For the web, it is not.
In flutter, the firestore implementation is based on the underlying OS. So you're safe on mobile apps, but not with flutter for web.