@valleyforge technically all you need is any watch that has the ability to export it's data. After that you just need to convert the file from one format to the other.
@swiley
I don't understand how that is a far fetched idea? If you can install apps onto a watch, why can't you create an app that exports data?
For example if you are looking for an open source option: https://www.pine64.org/pinetime/
@valleyforge
@barefootstache Consumer electronics with data export? What planet do you live on? @valleyforge