In a post in 2016 I wrote I will try to keep DIN Time running on Pebble watches for as long as possible. I’ve gotten questions about making DIN Time work with Gadgetbridge and/or Rebble. To be honest I have mentally moved on from the Pebble platform and my focus is now on developing DIN Time for Fitbit devices. I don’t want to say Gadgetbridge/Rebble will never happen, I just don’t find it very likely at the moment. Perhaps when Gadgetbridge/Rebble has matured a bit I will look into it.
And to save everyone from asking the question again: No, I am not prepared to open-source DIN Time.