For Android coders out there, issues and PRs are very welcome on GitHub https://github.com/vitorpamplona/amethyst
Amethyst is MIT License (fully open)
Discussion
Fun Fact: Amethyst is the gem stone the represents the Tribe of Gad in the House of Israel. The name Gad means "Good fortune". Shortly before Israel's death, he blessed Gad, saying: "A troop shall overcome him: but he shall overcome at the last."
Through Nostr (and Bitcoin), we're overcoming at last. Maybe it's a sign. 😏