Home

Welcome to the Secure Dialer Wiki 📚

Welcome to the official technical documentation and wiki for Secure Dialer—a modern, zero-internet, privacy-first open-source Android calling application built with Jetpack Compose, Kotlin 2.0, and Room Database with SQLCipher encryption.

---

⚡ Wiki Quick Navigation

Documentation Section	Description & Highlights
🏆 **[[Wall of Honor	Wall of Honor (Sponsors)]]**
📦 **[[Installation and Obtainium Guide	Installation & Obtainium Guide]]**
❓ **[[FAQ and Troubleshooting	FAQ & Troubleshooting]]**
🔑 **[[Permissions and Privacy Explained	Permissions & Privacy Breakdown]]**
🛡️ **[[Security and Encryption Architecture	Security & Encryption Architecture]]**

---

🌟 Core Features & Highlights

• 🔒 Zero-Internet Security: Compiled without the android.permission.INTERNET permission. Your call history, contacts database, and dialing activity physically cannot leave your device.
• ⚡ Lightning-Fast T9 Search: Dialpad search algorithm supports instant contact lookups by name, phone number, or initials.
• 🛡️ Local Encrypted Contacts Vault: Choose to store sensitive contacts in an isolated, SQLCipher-encrypted vault hidden from other apps.
• 🚫 Offline Call Screening & Spam Rejection: Block nuisance calls and unwanted numbers using Android's native CallScreeningService without cloud tracking.
• 📶 Dual-SIM Smart Selector: Full support for multi-SIM Android devices with automatic carrier preference memory and manual toggles.
• 🎨 Material You Dynamic Theming: Fluid Jetpack Compose Material Design 3 interface with true AMOLED dark theme support.

---

🛠️ Technology Stack Overview

Layer	Component / Framework
Language	Kotlin 2.0+ with Coroutines & StateFlow
UI Engine	Jetpack Compose (Material Design 3)
Database	Room Persistence Library + SQLCipher (AES-256 GCM)
Key Management	Android KeyStore System Provider (Hardware-backed TEE / StrongBox)
Telephony Integration	Android TelecomManager, InCallService, CallScreeningService
Target Platforms	Android 7.0+ (API 24 to 35+), GrapheneOS, CalyxOS, LineageOS

---

💬 Community & Support

• 🐙 GitHub Repository: Secure-Phone-apps/Secure-Dialer
• 💬 Community Discussions: GitHub Discussions
• 🐛 Report Issues: GitHub Issue Tracker
• 💖 Sponsor Project: GitHub Sponsors

---

📍 Quick Links: Wall of Honor | Installation and Obtainium Guide | FAQ and Troubleshooting | Permissions and Privacy Explained | Security and Encryption Architecture