willem.com

DIY Fitness Tracker

Building an smartphone App

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
Testing the app on my bike using a QuadLock case and mount
Testing the app on my bike using a QuadLock case and mount
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.
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
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
"Goin' the extra mile": 8 hours on my bike to test battery usage (note: there is still 23% power left!)

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