Building apps that work without internet connection
Implementing seamless sync when connectivity returns
Handling data conflicts between device and server
Reducing server load with intelligent caching
Improving app responsiveness with local storage

Quick Start

Minimal working example:

import AsyncStorage from '@react-native-async-storage/async-storage';
import NetInfo from '@react-native-community/netinfo';

class StorageManager {
  static async saveItems(items) {
    try {
      await AsyncStorage.setItem(
        'items_cache',
        JSON.stringify({ data: items, timestamp: Date.now() })
      );
    } catch (error) {
      console.error('Failed to save items:', error);
    }
  }

  static async getItems() {
    try {
      const data = await AsyncStorage.getItem('items_cache');
      return data ? JSON.parse(data) : null;
    } catch (error) {
      console.error('Failed to retrieve items:', error);
      return null;
    }
  }

// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
React Native Offline Storage	React Native Offline Storage
iOS Core Data Implementation	iOS Core Data Implementation
Android Room Database	Android Room Database

Best Practices

✅ DO

Implement robust local storage
Use automatic sync when online
Provide visual feedback for offline status
Queue actions for later sync
Handle conflicts gracefully
Cache frequently accessed data
Implement proper error recovery
Test offline scenarios thoroughly
Use compression for large data
Monitor storage usage

❌ DON'T

Assume constant connectivity
Sync large files frequently
Ignore storage limitations
Force unnecessary syncing
Lose data on offline mode
Store sensitive data unencrypted
Accumulate infinite queue items
Ignore sync failures silently
Sync in tight loops
Deploy without offline testing

mobile-offline-support

Mobile Offline Support

Table of Contents

Overview

When to Use