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.

skills.sh installs: 545
GitHub stars: 379
last updated: Aug 21, 2026

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Install

$ npx -y skills add aj-geddes/useful-ai-prompts --skill mobile-offline-support --agent claude-code

Installs into .claude/skills of the current project.

Files

Overview

Design offline-first mobile applications that provide seamless user experience regardless of connectivity.

When to Use

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);
    }
  }

SKILL.md on GitHub