If you want to import .gpx and .tcx files follow the steps below:
- Go to www.Runtastic.com
- Login to your account
- Go to "Home"
- In your settings click on "Import activity"
- Select "Choose file"
- Select the file you want to import, and the activity will be uploaded after you click on "Upload". If the import has been successful, there will be a message confirming the upload and you will be able to view the activity in your account.
Note: The file must not be bigger than 7 MB.