App Inventor came to the rescue when humanitarian aid workers in Haiti needed a way to track data in the field. Two apps, one to track rainfall and one to track commodities, were developed during the Humanitarian FOSS Project's Rhok (Random Hacks of Kindness) weekend. The Haiti Commodity App tracks commodity prices collected from various locations within the markets. The Haiti Rain Check app collects and records rainfall data from rain gauges scattered around Haiti. View this short video clip to get a sense of the power of App Inventor to help with real-world problems.