OvulationCalculator helps you determine fertile days of the month, so you can either achieve or avoid pregnancy. The calendar is based on the date of your last period and the average period length. You can use this app to track your periods, fertility days, temperature, pills, weight, and also due date if conceived. Extremely simple to use interface, simply tap on any date in the calendar to add or update information.

Features:
Auto adjusting cycle and period length based for accurate predictions
Easily track periods, fertility days, temperature, weight, pills and any other information you need in the notes
Option to backup your data to your local drive
Charts and statistics
Journal view to quickly take a look at your notes
Integrated help system
Choose themes to match your mood
Modern and sleek user interface with minimum clicks needed
Prediction algorithm accurately predicts future periods and fertile days
Support for multiple languages
Sync support, notifications, and many other features coming soon