Image Smith

Privacy-friendly image tools for iOS and Android. All processing happens on your device — nothing is uploaded.

Features

• Format Conversion — Convert between JPEG, PNG, WebP, HEIC, BMP, TIFF, and AVIF
• Quality Control — Adjustable quality slider for lossy formats
• Metadata Preservation — Option to keep or strip EXIF data
• Conversion History — View past conversions with thumbnails and stats
• Dark Mode — System, light, or dark theme
• Haptic Feedback — Configurable tactile feedback

Supported Conversions

Source	Targets	Platform
JPEG	PNG	iOS + Android
PNG	JPEG	iOS + Android
WebP	PNG, JPEG	iOS + Android
HEIC	JPEG, PNG	iOS + Android
BMP	PNG	iOS + Android
JPEG, PNG	HEIC	iOS only
TIFF	JPEG, PNG	iOS only
AVIF	JPEG, PNG	iOS + Android

Tech Stack

• Expo SDK 54
• React Native 0.81 + React 19 + React Compiler
• expo-router — file-based navigation
• Zustand — state management with AsyncStorage persistence
• expo-image-manipulator — core format conversion
• react-native-heic-converter — HEIC decode
• react-native-compressor — HEIC encode (iOS)

Getting Started

Prerequisites

• Node.js 18+
• Android Studio (for Android) or Xcode (for iOS)

Install

npm install

Run (Development Build)

This app uses native modules and requires a development build (not Expo Go).

npx expo prebuild

npx expo run:android

npx expo run:ios

Build Standalone APK

The debug APK requires Metro bundler running. To build a standalone APK with the JS bundle embedded:

cd android && ./gradlew assembleRelease

Output: android/app/build/outputs/apk/release/app-release.apk

Transfer this to your phone and install, or use:

adb install android/app/build/outputs/apk/release/app-release.apk

Project Structure

app/                          # Screens (expo-router)
  (tabs)/                     # Tab navigation: Home, History, Settings
  convert/                    # Conversion flow: Pick, Processing, Result
src/
  services/                   # Image processor, file manager
  utils/                      # Format detection, conversion matrix, error handling
  hooks/                      # Image picker, conversion orchestration
  stores/                     # Zustand stores (image, history, settings)
  components/                 # UI components (button, chip, card, etc.)
  constants/                  # Format definitions, tool definitions
  types/                      # TypeScript types
constants/                    # Theme colors