The Apple Watch Stryd app allows Stryders to set a calibration factor. Stryd is accurate out of the box and should not require calibration.
The Stryd team recommends that you follow these instructions to estimate a calibration factor:
Once you perform the Distance and Calibration test, you can calculate the calibration factor for the Apple Watch Stryd App:
(Actual Distance/Stryd Distance)
You can set the calibration factor on the watch by opening the Stryd Apple Watch App > scrolling down and selecting ‘Settings’ -> scroll down and selecting ‘Calibration’.
Note: The offline sync data will not reflect the calibration factor entered above. This calibration factor is only for data collected with the Apple Watch.