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Creating a Privacy-First Fitness App

Creating a Native iOS App for Workouts

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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I got some magic in my pocket: The app tracking workouts from the background - during recordings it just shows a widget on the homescreen
I got some magic in my pocket: The app tracking workouts from the background - during recordings it just shows a widget on the homescreen
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
Nothing makes you feel alive like going outside for some physical action - I love working out!
Nothing makes you feel alive like going outside for some physical action - I love working out!
"Goin' the extra mile": 8 hours on my bike to test battery usage (note: there is still 23% power left!)
Different configurations of realtime data
Different configurations of realtime data
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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