This is the progress tracker I made for our local community in Magdeburg, Germany. It shows which gyms are eligible for EX raids (according to OSM tags) and lets individual trainers keep track of their golden/silver/bronze badges.
It uses a static list of gyms so there is no TOS violation.
You can see the Magdeburg instance running at https://freudenbergs.de/bert/gymprogress/.
Click the badges to change level.
Badges are stored only in the browser's localStorage, not on the server.
Badges can be transfered/saved, you can use mine for testing.
You can also clear them again.
Clone this repo, replace the gymdata.js file, host it on some website, and share that URL in your community.
I used the method outlined by u/Tntnnbltn to generate the list of gyms eligible for EX raids.
You can use either my English or German html files, or add your own translation.
If you have any fixes or additions, or e.g. you translate the gymtracker.html file to another language,
please send a pull request.
I have learned a lot about Pokémon GO in the incredible SilphRoad community. Thank you, travelers!