Hey there and welcome to pretixdroid!
If you like to contribute to this project, you are very welcome to do so. If you have any questions in the process, please do not hesitate to ask us.
Please note that we have a Code of Conduct in place that applies to all project contributions, including issues, pull requests, etc.
This project has git submodules, so make sure to get them before you build it:
git submodule update --init