Inspired by the previous post, I made a version for the round Garmin watches. [0] I also tested and added support for a few ADS-B data providers. Unfortunately, the Opensky data in my area is quite poor and I couldn't display as much detail info compared to adsbexchange.

0: https://apps.garmin.com/en-US/apps/9e5f8f12-0369-46af-bd50-d...