Period Tracker is the easiest way to track your periods!
Extremely reliable. Very helpful. Easy to use.
The Woman Log app offers great features to track your cycle and period.
This application calculates the fertile days according to Knaus-Ogino and can track menstrual symptoms.
Extremely reliable. Very helpful. Easy to use.
The WomanLog app offers great features to track your cycle and period.
WARNING: It is not recommended to use this calendar to avoid pregnancy! There are more accurate methods, like measuring the basal body temperature.
The data can be backed up on a memory card or "internal" memory, if present.