Target Zone Keeper vs 30

Want to improve your endurance and cardiovascular fitness? Boosting your VO2 max - the amount of oxygen your body uses during intense exercise - is the key.  Target Zone Keeper helps you achieve this by keeping your heart rate in the optimal zone. With a simple, intuitive interface (no complex setup!), it offers visual cues and haptic feedback to keep you focused without interrupting your flow, even when you’re wearing a gloves or simply can’t turn your wrist! Key features - Keeps you in the target heart rate zone with minimal to none wrist interaction - Simple, intuitive setup for easy use right out of the box - Non-disruptive, customizable alerts - Personalized heart rate zones focused on VO2 max improvement - Seamless integration with Apple Health for workout tracking Benefits - Get instant feedback without disrupting your workout flow - Optimize your training specifically for VO2 max improvement

30-20-10: Smarter Interval Training, Right on Your Wrist Transform your workouts with the scientifically-backed 30-20-10 interval method—also known as "Jog, Run, Sprint"—now tailored exclusively for Apple Watch. Whether you're a beginner or a seasoned runner, 30-20-10 helps you train more effectively by guiding you through dynamic intervals: 30 seconds jog 20 seconds run 10 seconds sprint ...repeated in sets that drive real improvements in speed, endurance, and cardiovascular health. The app takes care of everything: - Tracks each training phase automatically - Includes warm-up and recovery intervals - Offers clear haptic and visual cues for each phase - Provides an in-depth summary post-workout: - Max heart rate - Time in each phase - Distance covered - Calories burned - Custom breakdown for performance insights Why 30-20-10 Works: This method is validated by sports science (source) to improve fitness in less time, reduce injury risk, and increase training enjoyment. No iPhone needed during your workout — just you, your Apple Watch, and results that speak for themselves. Start training the smart way. Download 30-20-10 today.