After some testing we can affirm that SimpleCalendar is compatible with the newest Joomla release, 3.6.0. Our latest version, 3.1.4 just hit the download section (although you need to make sure to read our post about a breaking change that might affect your event list layouts) was already tested on 3.6 beta and further testing on J3.6 final showed no particular problems. If you incur in a bug, be sure to let us know.
Meanwhile work is in progress to adapt the frontend event entry form to the latest design standards. We will drop the previously used twofold form definition (one for the front-, one for the backend) to a single form definition file, a change that might give some headaches to the translation team - sorry in advance for that! The main advantage will be that the layout can be streamlined between front- and backend, and translations made on one side might be preserved also for the other side. All while cleaning up as much code as necessary, for a more professional look-and-feel.
We also found a bug in our newly introduced Export function, which has already been patched and will be available with the next version. SimpleCalendar 3.1.5 is expected to be released early next week.