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Mobile App (Native iOS & Android)Sismotur

Inventrip

Native iOS (Swift) and Android (Kotlin) travel platform with smart tourist sign integration, geofencing, offline maps, and memory preservation — we built the complete dual-platform experience with location-based features and seamless destination connectivity

Inventrip app — A smart travel companion app connecting tourists with destinations through NFC/QR-enabled smart signs, geofencing, and personalized journey planning.

Project Overview

Inventrip transforms travel into an effortless and personalized adventure. The app integrates with smart tourist signs via NFC/QR codes, allowing travelers to connect and store insights from each destination. Enhanced connectivity ensures you're never more than a tap away from relevant travel information, with geofencing that automatically provides context-aware content as you explore.

Our Role

  • Native iOS app development (Swift + UIKit)
  • Native Android app development (Kotlin + Jetpack Compose)
  • Mapbox Maps integration for offline navigation
  • NFC & QR code scanning for smart sign connectivity
  • Geofencing system with background location tracking
  • Firebase backend for real-time data sync
  • Realm/Room local database for offline support
  • ML Kit text recognition for smart features

Tech Stack

iOS
SwiftUIKitSnapKitRealmSwift
Android
KotlinJetpack ComposeRoomHiltNavigation
Maps & Location
MapboxMaps 11.xGeofencingBackground Location
Connectivity
NFCQR CodesBluetoothDeep Links
Backend & Sync
FirebaseFirestoreCrashlyticsMixpanel
Networking
Alamofire (iOS)Retrofit (Android)Protobuf
ML & Recognition
ML Kit Text RecognitionGoogle Play Integrity
UI/Charts
ChartsSkeletonViewSwiftSoup

Challenge

Creating a unified travel experience across iOS and Android that works seamlessly with physical smart tourist signs, handles complex geofencing scenarios, and provides reliable offline functionality in areas with poor connectivity.

Solution

We built fully native apps for both platforms using Swift (iOS) and Kotlin (Android) to leverage platform-specific capabilities. NFC/QR integration connects users to smart signs instantly. Geofencing with background location services ensures context-aware content delivery. Offline-first architecture with Realm/Room databases and cached Mapbox maps guarantees functionality anywhere. Firebase provides cross-platform sync when online.

Results & Impact

Seamless connection with smart tourist infrastructure
Reliable offline navigation and content access
Context-aware travel information delivery
Multi-year platform maintenance and evolution (2023-2025)

Engineering Highlights

Dual native platform architecture (Swift + Kotlin)
Geofencing with foreground service and background location
NFC/QR smart sign integration for seamless connection
Offline-first with Realm (iOS) and Room (Android)
MapboxMaps with offline tile caching
ML Kit for camera-based text recognition
Deep linking with domain verification
Protobuf for efficient data serialization

Key Features

Smart Sign Integration

  • NFC tap-to-connect with tourist signs
  • QR code scanning for instant information
  • Automatic content retrieval and storage
  • Offline access to scanned destinations

Location Intelligence

  • Geofencing with automatic notifications
  • Background location tracking
  • Context-aware content delivery
  • Proximity-based recommendations

Journey Planning

  • Curated routes and itineraries
  • Events and POI discovery
  • Offline map navigation with Mapbox
  • Multi-day trip planning

Memory Preservation

  • Save and organize travel memories
  • Photo and note attachments
  • Timeline view of past journeys
  • Share experiences with community
NFC & QR Integration

Smart Tourist Sign Connectivity

Why it matters
Instant connection with physical infrastructure eliminates the need to manually search for information — tap or scan to instantly access curated local content
NFC tap-to-connect with smart tourist signs
QR code scanner for quick information access
Automatic content download and offline storage
Seamless integration with destination networks
Inventrip — Smart Tourist Sign Connectivity
Location-Based Content Delivery

Intelligent Geofencing

Why it matters
Automatic notifications when entering points of interest ensure you never miss relevant information — the app works proactively in the background
Background geofencing with foreground service
Automatic notifications at POIs
Context-aware content recommendations
Battery-efficient location monitoring
Inventrip — Intelligent Geofencing
Maps & Routes

Offline-First Navigation

Why it matters
Reliable offline maps and cached content ensure the app works everywhere — no data connection required for core functionality
Mapbox offline tile caching
Turn-by-turn navigation without connectivity
Curated routes and walking tours
Local database for destinations and memories
Inventrip — Offline-First Navigation

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