A macOS app that blurs your screen when you slouch

brew tap tldev/tap
brew install --cask posturr

Posturr A macOS app that blurs your screen when you slouch. Posturr uses your Mac's camera and Apple's Vision framework to monitor your posture in real-time. When it detects that you're slouching, it progressively blurs your screen to remind you to sit up straight. Maintain good posture, and the blur clears instantly. Features Real-time posture detection - Uses Apple's Vision framework for body pose and face tracking Progressive screen blur - Gentle visual reminder that intensifies with worse posture Menu bar controls - Easy access to settings, calibration, and status from the menu bar Multi-display support - Works across all connected monitors Privacy-focused - All processing happens locally on your Mac Lightweight - Runs as a background app with minimal resource usage No account required - No signup, no cloud, no tracking Installation Homebrew (Recommended) brew tap tldev/tap brew install --cask posturr Manual Download Download the latest Posturr-vX.X.X.dmg or .zip from the Releases page Open the DMG and drag Posturr.app to your Applications folder Launch normally - no Gatekeeper warnings (app is signed and notarized) Camera Permission Posturr requires camera access to monitor your posture. When you first launch the app, macOS will ask for permission. Click "OK" to grant access. If you accidentally denied permission, you can grant it later: Open System Settings > Privacy & Security > Camera Find Posturr and enable the toggle Usage Once launched, Posturr appears in your menu bar with a person icon. The app continuously monitors your posture and applies screen blur when slouching is detected. Menu Bar Controls Click the menu bar icon to access: Status - Shows current state (Monitoring, Slouching, Good Posture, etc.) Enabled - Toggle posture monitoring on/off Recalibrate - Reset your baseline posture (sit up straight, then click) Sensitivity - Adjust how sensitive the slouch detection is (Low, Medium, High, Very High) Dead Zone - Set the tolerance before blur kicks in (None, Small, Medium, Large) Compatibility Mode - Use public macOS APIs for blur (try this if blur doesn't appear) Quit - Exit the application (or press Escape anywhere) Tips for Best Results Position your camera at eye level when possible Ensure adequate lighting on your face Sit at a consistent distance from your screen The app works best when your shoulders are visible How It Works Posturr uses Apple's Vision framework to detect body pose landmarks: Body Pose Detection: Tracks nose, shoulders, and their relative positions Face Detection Fallback: When full body isn't visible, tracks face position Posture Analysis: Measures the vertical distance between nose and shoulders Blur Response: Applies screen blur proportional to posture deviation The screen blur uses macOS's private CoreGraphics API by default for efficient, system-level blur. If the blur doesn't appear on your system, enable Compatibility Mode from the menu to use NSVisualEffectView instead. Building from Source Requirements macOS 13.0 (Ventura) or later Xcode Command Line Tools (xcode-select --install) Build git clone https://github.com/yourusername/posturr.git cd posturr ./build.sh The built app will be in build/Posturr.app. Build Options # Standard build ./build.sh # Build with release archive (.zip) ./build.sh --release Manual Build swiftc -O \ -framework AppKit \ -framework AVFoundation \ -framework Vision \ -framework CoreImage \ -o Posturr \ main.swift Known Limitations Camera dependency: Requires a working camera with adequate lighting Detection accuracy: Works best with clear view of upper body/face Command Interface Posturr exposes a file-based command interface for external control: Command Description capture Take a photo and analyze pose blur <0-64> Set blur level manually quit Exit the application Write commands to /tmp/posturr-command. Responses appear in /tmp/posturr-response. System Requirements macOS 13.0 (Ventura) or later Camera (built-in or external) Approximately 10MB disk space Privacy Posturr processes all video data locally on your Mac. No images or data are ever sent to external servers. The camera feed is used solely for posture detection and is never stored or transmitted. License MIT License - see LICENSE for details. Contributing Contributions are welcome! Please feel free to submit issues and pull requests. Acknowledgments Built with Apple's Vision framework for body pose detection Uses private CoreGraphics API for blur, with NSVisualEffectView fallback Inspired by the need for better posture during long coding sessions Contributors @wklm - Compatibility mode implementation @cam-br0wn - Architecture-agnostic build improvements @einsteinx2 - SwiftPM/Xcode support