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Developing a privacy-respecting app to replace my smartwatch 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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My bike with Bluetooth sensors connected to my MacBook running Xcode
My bike with Bluetooth sensors connected to my MacBook running Xcode
Not your average debugging session: Fietselfstedentocht 2024
Not your average debugging session: Fietselfstedentocht 2024
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!
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)
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
I used my Garmin Edge data layout as an inspiration when designing my app's layout when used as mounted bike computer
I used my Garmin Edge data layout as an inspiration when designing my app's layout when used as mounted bike computer

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