The Recent Activity Log allows you to track your recent rewards and items gained or used in the game. 

Tap your Menu Icon -> Options (gear icon) -> Support -> Recent Activity

Please note - the Recent Activity Log displays only entries containing 3-star or higher rarity Items, Heroes and Weapons. Gained Gold is also shown. The consuming of Gold, Combat Items or Crafting Materials is not shown. Food, Metal or Recruits are also not shown. There might be a few minutes delay until your most recent activities will appear on the list.