Learn how to play Four Against Darkness using the Adventure Deck cards. Four Against Darkness: www.drivethrurpg.com/product/... Four Against Darkness Cards: www.drivethrucards.com/browse... Music by 17406877 from Pixabay
Depends on your phone, and what features you want to be honest. Cardwarden for iOS is the most popular that I know of, however you can also use flash card apps too!