Download Periodic Calendar
Many types of calendar tools are available in market today each with different abilities and purpose to suit the needs of different people. Periodic Calendar is one of those calendar applications designed for specific use. It is developed as an open source tool that can be helpful to female users for tracking their menstrual cycle and exact predictions about fertility periods. The tool uses methods like sympto-thermal and BBT which are known as the most reliable methods for predicting fertility periods. One can use the software tool and its calculations for planning contraception. It is surely one of the most reliable calendars you would find!