Heart Rate Trainer

Heart Rate Trainer is an Android app for real-time heart-rate monitoring and structured heart-rate-based training. It connects to a Bluetooth Low Energy (BLE) heart rate monitor (e.g., chest strap) and displays live BPM in a beautiful dark UI designed for high readability during workouts. Core concepts and purpose: - The app is built for interval training, zone-based pacing, and post-workout analysis. - User defined heart-rate zones are derived as percentages of Max HR and used throughout the UI for color coding, charts, and summaries. Key features: - Live monitor screen: real-time heart rate display with gauge visualization, zone alerts, recording controls and workout integration. - Bluetooth device scanning and connection: dedicated BLE scanner. - Workouts: Workout tab with pre-defined workouts and highly customization user-defined workouts including low intensity steady state (LISS), high intensity interval training (HIIT) and Tabata. - Data recording and management: heart rate samples recorded into local database with customizable retention policy. Ability to export data to CSV for analysis. - Analysis (Post-workout / sessions analytics): date-based browsing, visualization chart, zone distribution, summary of metrics and long-term trends. - Settings: max heart rate configuration, alert preferences, data management and devices management. Target users: - Athletes and fitness enthusiasts doing zone-based training. - Runners, cyclists, and HIIT trainees who want structured intervals, real-time zone feedback, and meaningful post-workout analytics. - Users who want all data stored locally with export/backup options.