Zanshin Fitness

The privacy-first Tabata timer. Track heart rate zones, calories, and points with Bluetooth HR monitors. 100% offline. No accounts. Your data stays yours.

Zanshin: The Privacy-First Tabata & HIIT Workout Timer

Train with focus. Own your data.

Zanshin is a professional-grade Tabata and HIIT workout timer designed for athletes who value both performance and privacy. Track your heart rate zones, calories, and training points—all while keeping your data 100% on your device.

KEY FEATURES

• Tabata & HIIT Timer

• Classic Tabata (20s work, 10s rest, 8 rounds)
• Customizable HIIT intervals
• Free-form open timer
• Create and save custom workouts
• Voice countdown announcements
• Visual and audio phase transitions

• Real-Time Heart Rate Tracking

• Connect Bluetooth heart rate monitors
• Monitor 5 heart rate zones in real-time
• Track average, max, and min heart rate
• Zone distribution analysis
• Training points system

• Performance Metrics

• Calorie burn estimation
• Heart rate zone points
• Workout duration tracking
• Energy level ratings
• Workout notes

• Privacy by Design

• 100% offline—no internet required
• All data stored locally on your device
• Export workout data to CSV
• Optional HealthKit integration

• Minimal Mode

• Distraction-free timer mode
• Hide metrics for maximum focus
• Perfect for pure Tabata sessions
• Toggle on/off anytime

• Workout History

• Complete workout history
• Heart rate graphs and zone analysis
• Export individual or all workouts
• Energy level tracking over time

• Health App Integration

• Optional HealthKit sync
• Workouts appear in Activity rings
• Full control over data sharing

PERFECT FOR

• Tabata enthusiasts • HIIT training athletes • Privacy-conscious fitness users • Athletes who want detailed heart rate insights • Anyone who values data sovereignty

PRIVACY FIRST

Your workout data, heart rate information, and personal metrics are stored exclusively on your device.

Your workouts. Your data. Your control.

TECHNICAL REQUIREMENTS

• iOS 18.6 or later • Bluetooth heart rate monitor (for full features) • Optional: HealthKit for workout sync

DISCLAIMER

Zanshin is a fitness tracking tool for informational purposes only. It is not a medical device and should not be used to diagnose or treat any health condition. Always consult with a healthcare professional before starting a new high-intensity training program.

Built for the focused. Handcrafted by https://nashubyte.com/