IOU is described as 'Do you hate putting an entire tab on your card, taking a picture of the receipt, and then calculating what everyone owes you? Then IOU is for you! This app will scan a receipt for you and itemize it. Then, you can add the people in your party and go one by one choosing what they' and is an app. There are more than 50 alternatives to IOU for a variety of platforms, including iPhone, Web-based, Android, iPad and Android Tablet apps. The best IOU alternative is Spliit, which is both free and Open Source. Other great apps like IOU are HomeBank, Splitwise, Splitser and SplitBills.