Thanks Mia. I read the reviews for that & it looks like it's better for phone than tablet. Saw this in one of the reviews:

"This is a great calender app for phones and but not so good if you need to use it on a tablet while away from an internet connection. That's because it stores your calendar on the Amazon cloud and if you aren't connected and logged into the app store it won't run. I understand the reason, they do it so that you can share calendars between devices but it's a poor choice. The right way to do it would be to store the calendar locally and sync it with a cloud based calendar when connected. That's the right way to do it and if they start doing that I'll start using it again"

Cheers.