This is the most expensive addon, and maybe the most important to share the calendar. Sometimes, users ask me why it is so expensive, so the best way to explain it, is to describe how it works.
How does it works?
After generating a unique ID, you can synchronize your calendar with my server. All shifts will be uploaded in anonymus mode (no email, no name and no personal data will be uploaded, only shifts info and calendar ID). I have to pay 200€ each year for my server, this is because this addon can`t be cheaper. I am not Mr. Google ;) Once the shifts are on the server, they can be used to create a PDF, used to be shared with other users, etc. This, thanks to your unique ID and a password.
I wrote 6 viewers: a PDF generator, an online webpage, a WP8 app, a Symbian app, a Windows 8 app and a widget for Android. They are all free, and you can give them to your friends to show your shifts:
Hope this will help you to understand, why I ask 5€ (I think it is more than honest!).