Building Offline-First React Native Apps with Turso and libSQL

The Problem with SaaS Field Apps

Legacy field service SaaS platforms (like ServiceTitan or Salesforce FSL) rely heavily on constant cloud connectivity. When a technician enters a remote area with zero cell service, these apps fail to load work orders, capture signatures, or update inventory.

The Custom Solution: Embedded libSQL

To solve this for a massive construction client, we abandoned cloud-dependent APIs and implemented an offline-first architecture using Turso and libSQL.

Architectural Flow

1. Embedded Replica: We bundle a local libSQL database directly inside the React Native application.
2. Local Reads/Writes: When the technician updates a work order, it writes instantaneously to the local SQLite file. Zero latency. Zero loading spinners.
3. Background Sync: The app uses Turso's native sync protocol to push changes to the edge database the moment connectivity is restored.

Code Implementation

Setting up the local sync client is shockingly simple:

import { createClient } from "@libsql/client/web";

const localClient = createClient({
  url: "file:local.db",
  syncUrl: process.env.TURSO_SYNC_URL,
  authToken: process.env.TURSO_AUTH_TOKEN,
});

// Write locally, instantly.
await localClient.execute({
  sql: "UPDATE work_orders SET status = 'completed' WHERE id = ?",
  args: [orderId]
});

// Sync to cloud in background
await localClient.sync();

The Result

By owning the architecture, we eliminated $400k/yr in SaaS licensing fees while providing field workers with an app that loads instantly, regardless of cell service.