Before I discovered this app I was sharing my data with bad guys, or using hacks to get the data to my pc. So now I will never buy any gadget that is not supported, I love this app.
So I wanted to donate, but if I follow the link to librepay I receive an error as in the attached screenshot.

@leonardomaccari that's a problem several folks share with the Gadgetbridge team. The "bank" Liberapay worked with (MangoPay) just canceled their contract for very dubious reasons. So there are no "clean SEPA" transfers possible at the moment – the only options are Stripe and PayPal, which are not acceptable to most of us. So we need to wait for them to come up with something workable.
Ran into the same problem.
Is bitcoin an option?
Hi,
I love gadgetbridge. :)
Thank you very much for all your work!!
Issue still existing, can not give donation.

Can i support you in any way?
Robert
@ashimokawa do you accept Bitcoin?
Hi all,
the team has decided to proceed with Librepay again, see copy/paste of the announcement posted in Matrix:
After more than a year we bit the bullet and re-enbled donations on liberapay by complying with what had to be done to make that work. We were already almost dried up and were unable buy devices we wanted to support. To make Gadgetbridge even better please consider to donate.
Do not want to push anyone but it was requested over and over again. And supporting new devices without having them is very time consuming ;)
So thank you very much for proceeding if you still consider supporting the project financially!
Most helpful comment
Ran into the same problem.
Is bitcoin an option?