Note Book is a fully offline, private, and secure workspace designed to manage your thoughts, track your finances, and monitor your health without sending a single byte of data to external servers.

Built with Flutter (Dart 3) and backed by an encrypted SQLCipher database, Note Book combines security, modern aesthetics, and smart features into a single workspace.

• Fully Formatted Notes: Write and organize notes using headers, checklists, blockquotes, lists, and images (powered by flutter_quill).
• Visual Categorization: Associate tags with notes. Note backgrounds dynamically adapt to matching tag color schemes.
• Auto-Saving & previews: Note content debounces and autosaves. Home cards display clean previews with list checkbox symbols (☐/☑).
• Grid & List Layouts: Render notes in uniform grid, masonry grid, or simple list view with smooth Material transitions.

• Dual-Entry Ledger: Track income, expenses, and current balances locally.
• Smart SMS Auto-Import: Listens for transaction SMS messages (optimized for Sri Lankan bank alerts) and parses transaction types, amounts, and dates in the background.
• Automatic Reversals & Deduplication: Detects refund messages and auto-reverses logs within 7 days, filtering out duplicate bank application notifications.
• Graphs & Trends: High-performance line charts depicting monthly income vs expense trends.
• Inline Calculator: Built-in simple mathematical operator support when entering transaction amounts.

• Privacy-First Cycle Tracking: Offline cycle prediction based on your log history.
• Prediction Algorithm: Outlier-aware calculations that ignore cycle anomalies (such as < 15 or > 60 days) to prevent skewing future prediction dates.
• Ovulation Prediction: Computes fertile/ovulation windows using standard luteal phase offset models.
• Discreet Alerts: Notifies you of upcoming cycles with customizable private text (e.g., "Check the app").

• Summarization: Generate bulleted summaries of note content locally. If Tamil text is detected, the summary language adapts automatically.
• Tag Suggestions: Recommends tags in the note editor based on your existing collection.
• Selection Refine: Refine selected paragraphs into Casualty, Professional, Expand, or Shorten tones on-device.
• AI SMS Parsing: Fallback extractor that parses banking SMS formats using native local models.

• SQLCipher Storage: The local SQLite database is fully encrypted at rest using 256-bit AES.
• Keystore Integration: Encryption keys are randomly generated and secured inside the Android KeyStore or iOS Keychain.
• Automated Lock: Locks screens immediately or after a custom idle background timeout. Supports Fingerprint, FaceID, or system PIN pattern bypass.

• Dual-mode conversion: Compress video/images using lightweight native APIs (Lite Mode) or download local FFmpeg binaries (FFmpeg Mode) for advanced formatting and metadata removal.

Note Book is distributed independently of centralized app stores to ensure complete control over code signature.

1. Navigate to the GitHub Releases Page.
2. Download the latest .apk file (e.g. note-book-v1.34.0.apk).
3. Open the downloaded file on your Android device.
4. When prompted, allow your web browser or file manager permission to "Install unknown apps".
5. Follow the on-screen installer instructions to finish.

• Flutter SDK (Version 3.38.5 pinned)
• JDK 17
• Android SDK & Gradle

1. Clone the repository:

   git clone https://github.com/SaadhJawwadh/Note-taking.git
   cd Note-taking

2. Get Dependencies:

   flutter pub get

3. Run the App in Debug Mode:

   flutter run

4. Compile a Release APK:

   flutter build apk --release

   Note: If no android/key.properties file exists in the directory, local release builds will default to signing with the debug certificate (~/.android/debug.keystore).