No, but the app does additional features that are paid add-ons. These include adding more calendars and removing ads.
You can use Palu on iPad, iPad mini, iPhone, iPod Touch. The device must be running iOS9.0 or later. In addition, Android5.0 or later. (It may not be usable depending on the model.)
You do not have to register your email address or give any other personal information.
By holding down on the tab of a calendar that you want to see you can overlap two calendars on the screen.
You can create three calendars including shared calendars. If you purchase the Add More Calendars add-on, you will be able to increase the maximum number of calendars to seven on the iPad, and five on the iPhone.
You can make an in-app purchase to remove advertisements.
Please follow these steps:
Send a calendar share invitation to yourself (from your main device) and follow the share instructions on your secondary device.
Please set “Share This Calendar” to OFF in Share Settings. Your data will be deleted from the server and sharing stopped immediately.
It is possible for all users who received an invitation mail from Palu to access your calendar data. If recipients forward the share invitation then these additional recipients will also gain access to the calendar. You should explain this to your friends and colleagues before giving them access to any sensitive information.