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Developing a Minimalist Fitness Tracker for iPhone Using Swift

Building a minimalist, data-friendly fitness app that respects user privacy

May 11, 2024 -

As a little side-project, squeezed between my normal work, I have been working on something of personal interest: a native workout tracking app for iOS. I wanted to make my smartwatch obsolete, instead using my phone to track workouts. How hard could it be to gather detailed sensor data using native Swift APIs?

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Different configurations of realtime data
Different configurations of realtime data
Apple Watch workout app shows large buttons to start a workout - no need for additional configuration
Apple Watch workout app shows large buttons to start a workout - no need for additional configuration
Testing the app on my bike using a QuadLock case and mount
Testing the app on my bike using a QuadLock case and mount
"Goin' the extra mile": 8 hours on my bike to test battery usage (note: there is still 23% power left!)
Early prototype of the app working with Bluetooth heartrate sensor and its early dataset shown in another app that makes some pretty graphs (HealthFit)
Early prototype of the app working with Bluetooth heartrate sensor and its early dataset shown in another app that makes some pretty graphs (HealthFit)
My bike with Bluetooth sensors connected to my MacBook running Xcode
My bike with Bluetooth sensors connected to my MacBook running Xcode

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