willem.com

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?

Continue reading
"Goin' the extra mile": 8 hours on my bike to test battery usage (note: there is still 23% power left!)
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
My bike with Bluetooth sensors connected to my MacBook running Xcode
My bike with Bluetooth sensors connected to my MacBook running Xcode
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
Not your average debugging session: Fietselfstedentocht 2024
Not your average debugging session: Fietselfstedentocht 2024
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

Other stories

all blog posts

Tagged

AppleBikeCreatingDataDesignLifestyleHeartMinimalProgrammingSensorsSportWatch

Articles (162)