IOOM: in+out-O-mator is described as 'In+out-O-mator is your personal diary for everything that matters — what you eat, how you feel, which medications you take, what you notice. Or whatever you want to keep track of. You define the parameters' and is a nutrition tracker in the sport & health category. There are five alternatives to IOOM: in+out-O-mator for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Web-based apps. The best IOOM: in+out-O-mator alternative is OpenNutriTracker, which is both free and Open Source. Other great apps like IOOM: in+out-O-mator are MyFitnessPal, Cronometer, YAZIO and Nutrivio.