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
• Crop — Rectangular crop with aspect ratio presets (Free, 1:1, 4:3, 3:2, 16:9)
• Shape Crop — Crop to circle, triangle, star, heart, or hexagon shapes
• Brush Crop — Freehand paint the area to keep, everything else becomes transparent
• Rotate / Flip — Rotate by any angle, flip horizontal or vertical
• Resize — Custom dimensions with aspect ratio lock
• Compress — Reduce file size with adjustable quality
• Strip Metadata — Remove EXIF data (GPS, camera info, timestamps)
• Editor — Multi-tool editor: apply multiple operations in sequence with undo, then export as JPEG, PNG, or WebP
• Quality Control — Adjustable quality slider for lossy formats
• Conversion History — View past operations with thumbnails and stats
• Dark Mode — System, light, or dark theme
• Haptic Feedback — Configurable tactile feedback

Supported Conversions

Source	Targets	Platform
JPEG	PNG, WebP	iOS + Android
PNG	JPEG, WebP	iOS + Android
WebP	PNG, JPEG	iOS + Android
HEIC	JPEG, PNG	iOS + Android
BMP	PNG	iOS + Android
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 — format conversion, crop, rotate, flip, resize
• @shopify/react-native-skia — GPU-accelerated shape/brush crop with path clipping
• react-native-compressor — image compression

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

cd android && ./gradlew assembleRelease

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

Build for iOS

eas build --platform ios --profile production
eas submit --platform ios

Project Structure

app/                          # Screens (expo-router)
  (tabs)/                     # Tab navigation: Home, History, Settings
  convert/                    # Conversion flow: Pick, Processing, Result
  crop/                       # Crop flow (rectangular + shape + brush)
  rotate/                     # Rotate / Flip flow
  resize/                     # Resize flow
  compress/                   # Compress flow
  metadata/                   # Metadata view / strip flow
  editor/                     # Multi-tool editor
src/
  services/                   # Processors (crop, resize, compress, convert, metadata)
  utils/                      # Format detection, conversion matrix, save format, error handling
  hooks/                      # Image picker, tool processing orchestration
  stores/                     # Zustand stores (image, history, settings)
  components/                 # UI components (crop overlay, rotate config, format picker, etc.)
  constants/                  # Format definitions, tool definitions, shape definitions, theme
  types/                      # TypeScript types