Using Stamina Bar with the Apple Health app on iPhone empowers you to better manage your health. You will see a consolidated view of your health data in Stamina Bar, so you can track your progress in one convenient place.
Stamina Bar helps you track resting and workout calories burned daily, leading to smarter decision making based on your weight management goals.
Heart Rate Variability (HRV) is one of the most accurate indicators of how well your body is recovering from stress. Stamina Bar helps you track your HRV daily and increase its weekly average, leading to more balanced Vitality.
Cardio Fitness (V02 Max) is a key metric for long-term heart health and endurance. Stamina Bar tracks your V02 Max overtime with feedback on its trend. The score is recalibrated by completing a cardio-based workout.
High percentages mean you're recovered and lower levels show exertion—you decide to rest or give more effort.
I love tracking my daily recovery and knowing when to let my body rest
makes running more intuitive, learned how to interpret how my body feels.
My boyfriend and I both use it during our workouts and we love it!
very thoughtfully designed, very intuitive. It’s encouraging to see my numbers go up.
Demo
About Me
Bryce E. has been a passionate iOS Developer since 2017, starting as a self-taught freshman in computer science. His running journey began with a 5K in January 2019 and culminated in completing the Memphis Marathon that December. By October 2021, he became the youngest 50-mile ultramarathon finisher in Memphis. Along the way, he used his Apple Watch health data—combined with Python and data science skills—to realize his training aligned more with endurance than elite-speed racing. That insight led him to build Stamina Bar, an app that transforms complex health metrics into simple, actionable insights. It’s designed not to overwhelm or obsess, but to guide users toward sustainable growth. Bryce also volunteers with Girls on the Run (GOTR), where mentoring young athletes has fueled his passion to inspire the next generation through thoughtful technology and movement.