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Creating a Privacy-First Fitness App

Tracking workouts without a smartwatch using native iOS 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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Not your average debugging session: Fietselfstedentocht 2024
Not your average debugging session: Fietselfstedentocht 2024
My bike with Bluetooth sensors connected to my MacBook running Xcode
My bike with Bluetooth sensors connected to my MacBook running Xcode
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
Designing a paywall for my app: not my favourite ask from users, but it is a very important one nonetheless.
Designing a paywall for my app: not my favourite ask from users, but it is a very important one nonetheless.
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!)

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