Cadence
Pedalling cadence from the .fit file as a time series on the workout.
FitAttach
Cadence, power, and speed in your cycling workouts.
FitAttach reads a .fit file from your bike computer and adds cadence, power, and speed to the matching Apple Watch cycling workout in Apple Health — or creates a new workout when none overlaps. Everything runs on your device.
Importing a .fit fileOn device
ride.fit
1,842 data points read
08:14 → 09:37Time range
Matched workout
Cadence, power, speed added
1Workout updated
Apple Health
Everything stays on the iPhone
0Accounts needed
How it works
Three steps from a .fit file to a complete cycling workout in Apple Health.
Pick a .fit file
Choose the recording from your bike computer or another app. FitAttach reads the file directly on your device.
Match the workout
FitAttach finds the Apple Watch cycling workout that overlaps with the recording’s time range.
Attach or create
Cadence, power, and speed are added to the matched workout — or a new workout is created if none overlaps.
What FitAttach adds
The values Apple Watch cycling workouts often miss.
Power
Wattage from a power meter, mapped cleanly onto the workout.
Speed
Speed over time from the bike computer’s recording.
Why FitAttach
Runs on device
Reading and matching happen locally on the iPhone. There is no server and no account.
Works with Apple Health
FitAttach writes into existing cycling workouts instead of creating a parallel history.
No matching workout? No problem
If no recording overlaps, FitAttach creates a new cycling workout from the .fit file.
Privacy-conscious by design
Only the permissions needed to read and write Apple Health — nothing more.
Try FitAttach
FitAttach is coming as a free app. Reach out to Halwick Labs if you would like early access or have questions.