Zone Trainer - Free Download

Train smarter with ZoneTrainer — the heart rate zone training app built for runners, cyclists, and endurance athletes.
🎯 REAL-TIME ZONE TRACKING
Connect any Bluetooth LE heart rate monitor (Garmin, Polar, chest strap, armband) and see your current zone (1-5) instantly. The app's theme changes color based on your status: teal when you're in your
target zone, amber when you're out.

📊 3 CALCULATION METHODS
Choose the method that fits your training:
• Simple — percentage of max heart rate
• Karvonen — based on heart rate reserve (HRR)
• Lactate Threshold (Friel) — percentage of LTHR

🏃 STRUCTURED TRAINING PROGRAMS
Built-in progressive programs with warm-up/cool-down intervals:
• Base Building
• 5K Training
• Marathon Prep

🔊 AUDIO CUES
Clear voice announcements for zone transitions and periodic alerts if your HR is too high or low. Train with your screen off and stay informed.

📈 SESSION HISTORY
Track your progress with saved sessions showing:
• Duration and average BPM
• Zone time distribution
• Optional distance tracking
• Weekly summary and volume charts

⚙️ CUSTOMIZABLE
• Edit all 5 heart rate zones
• Adjust alert intervals
• Retake onboarding anytime
• Auto-reconnects to your last monitor

📱 MODERN FEATURES
• Picture-in-Picture mode
• Light and dark themes
• Landscape support
• Background operation with foreground service

💎 PRICING
14-day free trial included. Unlock full access (History & Programs) with a one-time $3.99 purchase. No subscriptions, no recurring fees.

🔒 PRIVACY
All data stays on your device. Nothing is sent to external servers.

📲 REQUIREMENTS
• Android 8.0 or newer
• Bluetooth LE heart rate monitor

Get started today and train in the right zone, every time.