You can get Fireball Beta both on iOS and Android.
Open the Testflight app, find Fireball RPG, and tap the Update button.
Find Fireball RPG on Google Play and update. If you have trouble finding Fireball RPG in Google Play, go to https://fireballrpg.com/androidbeta – this link will work only for people who already received access to Alpha.
Didn’t get the Alpha version?
In case you hadn’t received the Early Access yet, please go here and tap the button “Get Early Access.”
Make sure you’re signed in with a Google Play account or Apple ID connected to your Fireball access. If you are still having trouble finding the app, please contact us at email@example.com, and we’ll help you as soon as possible.