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Developing a Minimalist Fitness Tracker for iPhone Using Swift

Tracking workouts without a smartwatch using native smartphone features

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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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
Screenshots of the app's onboarding process: asking for permissions and guiding new users
Screenshots of the app's onboarding process: asking for permissions and guiding new users
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)
Design sketch describing the desired layout
Design sketch describing the desired layout
"Goin' the extra mile": 8 hours on my bike to test battery usage (note: there is still 23% power left!)
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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