I was searching for a nice-looking Android app that can keep track of my expenses and I found Expense Manager. The app itself is free and it looks like it suits my needs, but it also has some premium features that I want. They can be unlocked through an in-app purchase. Before I pay money for them, I wanted to figure out how I can restore this purchase in case I ever have to reinstall the app after a factory reset.
Is there a standard procedure to restore this in-app purchase? Does it happen automatically? Do I have to do it manually through Google Play?