diff --git a/README.md b/README.md
index c17d0f4..72a4a6a 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,13 @@
 
 # Nowser
 
-A nostr signing app for IOS and Android.
+A secure nostr key management and signing app for iOS and Android that supports multiple authentication methods:
+
+- **NIP-07**: Acts as a browser extension replacement for mobile, allowing you to securely sign into nostr web apps
+- **NIP-46**: Functions as a remote signer (like a "bunker"), letting you keep your private keys on your phone while signing requests from your desktop
+- **NIP-55**: Supports Android's native key management system for secure key storage (similar to Apple Keychain)
+
+This app helps you manage your nostr identity securely across devices while maintaining control of your private keys. It's designed to be a mobile-first solution for the growing nostr ecosystem.
 
 </div>
 
@@ -21,3 +27,88 @@ Android: Downlaod From [Release](https://github.com/haorendashu/nowser/releases)
 
 IOS: Download from [TestFlight](https://testflight.apple.com/join/b4zVVxaM) https://testflight.apple.com/join/b4zVVxaM
 
+## Building from Source
+
+### Prerequisites
+- Flutter SDK
+- Android Studio (for Android builds)
+- Xcode (for iOS builds)
+- Git
+
+### Platform-Specific Notes
+
+#### iOS/macOS Prerequisites
+1. Install CocoaPods if you haven't already:
+```bash
+sudo gem install cocoapods
+```
+
+2. Install project CocoaPods:
+```bash
+cd ios  # or 'cd macos' for macOS builds
+pod install
+```
+
+3. Open the workspace in Xcode:
+```bash
+open ios/Runner.xcworkspace  # or 'open macos/Runner.xcworkspace' for macOS
+```
+
+4. In Xcode:
+   - Select the Runner project in the navigator
+   - Select the Runner target
+   - Under Signing & Capabilities:
+     - Select your Team
+     - Update Bundle Identifier if needed
+   - If building for macOS, ensure the following capabilities are enabled:
+     - Outgoing Connections (Client)
+     - Incoming Connections (Server)
+
+#### Web
+```bash
+flutter build web
+```
+- The web build will be available in `build/web` directory
+- You can serve it using any web server
+- For local testing, you can use Python's built-in server:
+```bash
+cd build/web
+python -m http.server 8000
+```
+
+#### Desktop Builds
+- For Windows, you need Visual Studio with "Desktop development with C++" workload
+- For Linux, you need the following dependencies:
+```bash
+sudo apt-get install clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev
+```
+
+### Build Instructions
+
+1. Clone the repository with submodules:
+```bash
+git clone --recursive https://github.com/haorendashu/nowser.git
+cd nowser
+```
+
+2. If you already cloned without submodules, initialize and update them:
+```bash
+git submodule init
+git submodule update
+```
+
+3. Install Flutter dependencies:
+```bash
+flutter pub get
+```
+
+4. Build the app:
+- For Android:
+```bash
+flutter build apk
+```
+- For iOS:
+```bash
+flutter build ios
+```
+