Reviewed in Android App Report
Clearly the Play Store has a "my account" section that lists all your paid apps. What I like about this app is that you can convert the currency to your local dollar. You can also sort the apps by in-app purchases or bought upfront. If you're like me and have a set of apps dedicated to finding other apps you'll need something to help organise it all. This helps to keep the spending in check as it gives the total and average amt spent to date. This app was recommended by Playboard.