XP — Experience Points
Points earned for defeating enemies and completing adventures; enough of them lets a character grow more powerful.
Experience Points (XP) reward the party for overcoming challenges. In many games a character who collects enough rises a level. Monsters often list how many they are worth, which is also a hint of how dangerous they are.
In Fantasy RPG
In Fantasy RPG every monster lists an XP value. Encounters add up their monsters' XP to estimate difficulty. The app does not yet track XP on characters; levels are set on the character.