Not sure if this was mentioned but this app is free today. Normally $6.99. It's a great calendar app.
https://itunes.apple.com/us/app/calendars+-by-readdle/id371434886?mt=8&at=10l3Vy
https://itunes.apple.com/us/app/calendars+-by-readdle/id371434886?mt=8&at=10l3Vy