You can purchase hard currency (Flutterbucks) in Flutter by heading into the shop menu or pressing the cog by your Flutterbuck total.
Buying flutterbucks will require payment via the iTunes/Google Play store. You will be prompted when selecting the amount of flutterbucks you wish to purchase and then be asked to confirm your purchase.
Once the transaction has been processed your flutterbucks will show up in game. If there is trouble with processing or flutterbucks do not show up after purchase, please contact support via the 'Help' option in the game. This is the fastest and easiest way to contact us!