Solution blueprintMobileLogistics & supply chain

Offline-First Fleet & Logistics App

Android and iOS app for drivers with live tracking, routing and proof-of-delivery scanning that keeps working without signal.

Start a similar project All work
Focus
Mobile
Industry
Logistics & supply chain
Primary stack
Flutter
Architecture
4 components

From problem to production

  1. Problem

    Drivers on rural routes regularly lose mobile coverage, so dispatch updates are dropped and tracking goes dark.

  2. Requirements

    • Keep working with no mobile signal
    • Never lose a delivery event
    • Scan barcodes and documents as proof of delivery
    • Alert drivers to urgent re-dispatch

  3. Architecture

    A Flutter app that queues every event in local SQLite and syncs automatically when the connection returns, with maps-based routing and camera scanning built in.

    1. 01Flutter Client
    2. 02SQLite Sync Queue
    3. 03REST / WebSocket API
    4. 04Fleet Database

  4. UX

    Large touch targets for use in a vehicle, a clear sync status, and a scan flow that works one-handed.

  5. Development

    A Flutter app with a local SQLite event queue, a sync engine that retries safely, and REST/WebSocket APIs to the fleet backend.

  6. Testing

    Offline and flaky-network scenarios on real devices, sync-conflict tests, and scanner tests in poor lighting.

  7. Deployment

    Staged rollouts through the App Store and Play Store, with backend changes kept compatible with older app versions.

Key capabilities

  • Offline event queue with automatic sync
  • Route guidance with Google Maps
  • Camera barcode and document scanning
  • Push alerts for urgent re-dispatch

Technology

  • Flutter
  • Dart
  • Google Maps API
  • SQLite
  • Firebase Cloud Messaging

This is a solution blueprint: a representative architecture showing how we approach this kind of problem. Every real build is shaped around the client’s existing systems, constraints and budget.

More blueprints

Start here

Build something similar.

Tell us about it — we’ll help you shape it, starting with a free discovery call.

Start a Project