In Mini City Tycoon , “friend boost” usually means a bonus you get for having friends added or active in the game, often to increase income, XP, or another progress-related reward. The exact effect can vary by game update, but it is generally a multiplayer bonus tied to your friends list rather than a separate item.

What it likely does

  • Gives extra money, XP, or speed-related progress.
  • May scale with how many friends you have.
  • Can sometimes cap after a certain number of friends.

Simple example

If the game shows a 10% friend boost, that usually means you earn 10% more of whatever stat the boost applies to, such as cash or experience.

Best way to think about it

It is basically a social bonus for playing with friends, meant to help you progress faster and encourage adding or joining friends in the game.

If you want, I can also help interpret the exact friend boost text shown in your game screenshot or menu.