Hats off to #[0], the updated Amethyst is great. Let's you change zap amount, and longclick let's you set preset sat amount buttons. Also right next to amount of likes is the amount of sats they got, which I love!

**Note, if you download Amethyst through the Google Play Store, and then download the new version through. .apk, you have to uninstall the old version first or the new version won't install.