iTunes Restore Purchase statement:
Users restore transactions to maintain access to the content they've already purchased. For example, when they upgrade to a new phone, they don't lose all of the items they purchased on the old phone. Include some mechanism in your app to let the user restore their purchases, such as a Restore Purchases button.
You will not be double charged when you hit Restore Purchase.
On your Abide app go to Profile > Settings > Restore Purchase