Helium: Endurance Trainer is a comprehensive app designed to help runners of all levels improve their endurance and achieve their fitness goals. Whether you're a beginner starting with Couch-5K or an advanced marathoner, this app has all the tools you need to train smarter and get fit faster.

One of the standout features of Helium is its ability to automatically learn each runner's individual Effort Zones and match them to a training plan that is appropriate for their fitness level. With plans available for couch to 3k, 10k, half-marathon, and more, you can easily find a plan that suits your goals directly within the app.

What sets Helium apart from other run trackers is its Ambient Pacing Assistant on the Apple Watch. This feature makes it easy to execute even the most complex interval workouts without losing focus. The Assistant provides customizable visual, haptic, and audio feedback to help you stay in the appropriate Effort Zones prescribed by your training plan.

After each workout, Helium's metrics dashboard allows you to track your fitness progress with Cardio Efficiency and Strain measurements. This helps you see how your cardiovascular endurance improves over time, thanks to the proven effectiveness of zone-based interval training.

Helium also integrates with the Health app, allowing you to analyze your past workouts and save new ones.

Overall, Helium: Endurance Trainer takes the guesswork and pain out of endurance training and makes running fun again. Whether you're a beginner or an experienced runner, this app will help you reach your fitness goals and become a better runner. Download Helium from the App Store and start your 14-day free trial today.