100% Offline-First, Private PDF Studio built with Compose Multiplatform & Apple-style Liquid Glass UI
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- 🛡️ 100% Offline & Private: Zero network permissions requested. Your documents never leave your device.
- 🪞 Signature Liquid Glass UI: Built with real-time GPU shaders (Kyant Backdrop) featuring optical lens refraction, chromatic aberration (RGB channel splitting), and touch-following glow.
- 🧭 Floating Liquid Glass Dock: iOS-inspired bottom navigation dock with spring-animated sliding selection indicator.
- 📑 End-to-End PDF Merge: Combine multi-page PDFs with custom drag-and-drop reordering and memory-efficient streaming.
- 📲 System Intent Filters: Open or share PDFs directly from WhatsApp, Telegram, Files, or Downloads into Roxy PDF Toolkit.
- ⚡ 3 Hardware Tiers:
- Tier 3 (Android 13+): Full AGSL RuntimeShader lens curvature and chromatic aberration.
- Tier 2 (Android 12): RenderEffect hardware blur + vibrancy boost.
- Tier 1 (Android 11-): 60fps translucent fallback for budget hardware.
Roxy PDF Toolkit follows a clean, modular architecture separating common UI from platform PDF engines:
roxy-pdf-toolkit/
├── androidApp/ # Android Application entry point
│ ├── src/main/AndroidManifest.xml # Intent filters, zero internet permission
│ └── src/main/kotlin/com/roxy/pdftoolkit/
│ ├── RoxyApplication.kt # PDFBox & Koin initialization
│ └── RoxyMainActivity.kt # Edge-to-edge Compose host & SAF handlers
│
└── composeApp/ # Shared Multiplatform module
├── commonMain/ # 100% Platform-Agnostic UI & Engine Interface
│ └── kotlin/com/roxy/pdftoolkit/
│ ├── ui/
│ │ ├── theme/ # RoxyTheme, RoxyColor, RoxyType, RoxyMeshBackground
│ │ ├── glass/ # RoxyLiquidGlass, RoxyTier, RoxyGlassInteraction, RoxyGlassCard
│ │ ├── navigation/ # RoxyGlassNavBar, RoxyNavDestination
│ │ ├── scaffold/ # RoxyToolScaffold, RoxyToolHeader
│ │ ├── home/ # RoxyHomeScreen, RoxyToolCard
│ │ └── tools/merge/ # RoxyMergeToolScreen, RoxyMergeViewModel, RoxyMergeState
│ ├── engine/ # RoxyPdfEngine interface, RoxyPdfDocument, RoxyOperationResult
│ └── di/ # RoxyCommonModule (Koin)
│
└── androidMain/ # Android Platform Implementations
└── kotlin/com/roxy/pdftoolkit/
├── engine/ # RoxyAndroidPdfEngine, RoxyPdfRendererWrapper
├── saf/ # RoxySafFilePicker, RoxySafFileSaver
├── tier/ # RoxyDeviceTierDetector
└── di/ # RoxyAndroidModule (Koin)
- Open project in Android Studio Meerkat / Ladybug (or IntelliJ IDEA).
- Sync Gradle dependencies.
- Run
:androidAppon an Android device or emulator (Android 8.0+ / API 26+).
Licensed under the Apache License 2.0.