Here two Screenshots of the Pro-Version.
In the first Screenshot you see the optional fixed Color Key for everyone how always forget the Color meaning 
In the second Screenshot the new Preferences Menue. I had to do, because now there are so many options that I can not put them all on the Mainscreen as Icon.
New Feature are:
- Send your History “Show as List” as email (for example to your Doc)
- Password Protection for each User
- Change Month View just by sliding on the touchscreen
- Get a Color Code on the Calendar all the Time
- Backup your Data on the Sd-Card
- Set Time for an Alarm
- Alarm for “Take Pill”
- Alarm for Period (one Time x Days before or as Countdown)
- Alarm for Ovulation (one Time x Days before or as Countdown)
The Notification also tells you if you are fertil on that day. - Long Press on Days (optional as some people said its to sensitive)
- Now fixed Cycle setable up to 99 Days.