Mobile Offline Support

This handles the fundamentals of building mobile apps that work without internet: local storage with AsyncStorage, Realm, or SQLite, sync queues for when connectivity returns, and conflict resolution strategies. You'll want this if you're building anything where users might lose signal or work in areas with spotty coverage. It covers React Native, iOS Core Data, and Android Room implementations. The best practices are solid reminders about things people forget, like monitoring storage limits and not syncing in tight loops. Honestly, offline support is one of those features that seems optional until your users start complaining, so it's worth getting right the first time.