I build and maintain Petrichor in my spare time. There is no paid tier, no ads, and nothing tracking you, so it runs on the goodwill of people who find it useful. If you would like to chip in toward the time and tools that go into it, a one-off coffee or a recurring sponsorship both help more than you would think.
Not able to contribute financially? Starring the repository, reporting bugs, and telling a friend help just as much.