Peri is described as 'Is period tracker application. The application has the necessary features that help you track your cycle. The app shows:' and is a Period Tracker in the sport & health category. There are more than 25 alternatives to Peri for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Apple Watch apps. The best Peri alternative is drip., which is both free and Open Source. Other great apps like Peri are Mensinator, Menstrudel, Flo Period & Ovulation Tracker and Glow: Ovulation & Period Tracker.