Hey @Alexandra1,

Sorry for the differences you're seeing in your activities. These data discrepancies could either be a result of the way your file is formatted or the way your device/app is choosing to analyze the data.

To provide context, Garmin set the industry standard with FIT and TCX file formatting (read more here and here). We use Garmin's file formats in order to upload and analyze the data in your file. If your device/app isn't following these standards or if the company has made file formatting modifications to accommodate device or app specific features, then we may not be able to correctly parse the files. This could lead to differences in your activity stats when compared between platforms.

Another consideration is whether your device/platform is using a different method than Strava when calculating your stats. For example, consider the process of determining how much resting vs moving time is in an activity. What constitutes a rest? Is it when you're at rest for 1, 3, 10, or 20 seconds? And what does your speed have to fall below in order for you to be considered at rest? 1 second might capture too many false positives and 20 seconds may be too strict. One calculation isn't necessarily correct or incorrect, but we do feel we're using standards that most athletes would agree upon.

We understand our athletes use hundreds of different devices and apps and are doing our best to accurately analyze each file regardless of the differences in file formatting. We're always working to improve our athletes' experience and we will pass this feedback along to our engineering teams.

I hope this helps. If you have any other questions, please let me know.