Simple IOU is a free iPhone app developed by Danny Shoffner, designed to help you keep track of your debts and balances. It falls under the category of Business & Productivity, specifically in the Finance subcategory.

With Simple IOU, you can easily manage your loans by recording how much you loaned, how much has been paid back, and how much you are still owed. The app also allows you to track when payments were made, providing you with a comprehensive payment history.

One of the key features of Simple IOU is its ability to email the payment history if needed. This makes it convenient to share the details with others involved in the loan. By using this app, you can say goodbye to the hassle of keeping track of IOUs on pieces of paper.

Overall, Simple IOU is a straightforward and user-friendly app that simplifies debt tracking. It provides a convenient way to manage your loans and stay organized with your finances.