Building Offline-First Mobile Apps for Field Teams

Field teams often work in areas with poor connectivity. Here's how to build apps that work anywhere.

Why Offline-First Matters

• 60% of Indonesia lacks reliable 4G coverage
• Field workers need to capture data regardless of connectivity
• Sync when connected, work when not

Key Strategies

1. Local Database

Use SQLite or Realm to store data locally first.

2. Background Sync

Queue changes and sync automatically when connectivity returns.

3. Conflict Resolution

Design for conflicts when multiple users edit the same record.

4. UI Feedback

Always show sync status so users know if they're working online or offline.

Implementation with React Native

We typically use:

• WatermelonDB for local storage
• Redux Persist for state management
• NetInfo for connectivity detection

Real-World Example

Our logistics tracking app for a national courier company works seamlessly offline, syncing 10,000+ deliveries daily.