A lightweight heart rate monitoring app for Android, built with Jetpack Compose and Material 3. Connect to BLE heart rate monitors and track your heart rate in real time. Features: - Bluetooth LE heart rate monitoring: scan and connect to any BLE heart rate device - Real-time heart rate display with animated heart icon - Floating window overlay for always-on heart rate display - Status bar heart rate indicator with auto color adaptation - Heart rate history with chart analysis (powered by Vico) - Heart rate alerts with posture detection (sitting/standing/exercising) - HTTP server and WebSocket server for real-time data streaming - Webhook support for pushing heart rate data to external services - Favorite devices with auto-connect - Fully customizable UI: colors, opacity, corner radius, size - Material 3 design with dynamic color support (Android 12+) - Fair memory management for Chinese OEM devices (vivo, Xiaomi, OPPO, Honor) - Privacy-friendly: no tracking, no ads, no analytics Open source under MIT License.