I have a fairphone with e/os which I’m very happy with. I’m currently looking for some earbuds and would love to get the fairbuds. However, I don’t want to have to put a closed source app on my phone to make them work, and I dislike closed source software in general. Fairphone has an excellent history of respecting user privacy and the app appears to be tracker free at present Report for com.fairphone.android.fairbudsapp 2.1 - εxodus but being closed source still means that fairphone has exclusive control over the software and, as they themselves say in their page on open source, " If you can’t open it, you don’t own it." Open Source and Fairphone, what we believe in - Fairphone .
Given this please consider open sourcing the fairbuds app. you will have at least one happy customer.