
fit2apple
Map any workout to Apple HealthKit workout activity type
3 followers
Map any workout to Apple HealthKit workout activity type
3 followers
Fit2Apple is an API that auto-detects the correct HKWorkoutActivityType for any workout using a smart classification pipeline. It helps Apple Watch apps activate the right sensors, improve tracking accuracy, and simplify HealthKit integration.


I built Fit2Apple because I kept seeing fitness apps struggle to pick the right `HKWorkoutActivityType`. Many just guess or assign a random type and that means the Apple Watch doesn't activate the right sensors, so users get poor tracking and often feel frustrated. I wanted to fix that with a tool that just works no guesswork, no manual mapping.
Fit2Apple is built on a research-backed 4-stage pipeline that looks at each exercise’s name, sets, duration, rest, and intensity to figure out the most accurate workout type. Unlike rule-based or hardcoded systems, it adapts to complex formats like HIIT, cross training, and custom routines whether the workout is fully structured or free-form.
I am excited about the real impact it has for users. Their Apple Watch now knows exactly what workout they’re doing, activates the right sensors, and logs better data: calories, heart rate zones, workout rings, and more. No more "Other" workouts. Just accurate, meaningful results that reflect the effort they actually put in. I am providing here a demo UI ( not the product ) that consumes the service just for illustration and demo purposes.