How can I check my coin usage history?
Click on the "more" button on the bottom menu of the home screen and it will display the number of coins you have. Click on the area displaying your coin number and you will move to the coin history page.
The "+" tab shows your coin purchase history and a record of coins you've received through other means. The "-" tab shows a record of instances you used coins to purchase episodes and limited time offer coins that have expired.
To learn more about the types of coins, please refer to the following: About the types of coin