UpTo makes calendar sharing easy, even between iPhone and Android, or between Google Calendar and Outlook.
Shared calendars appear on the back layer of your UpTo calendar, giving you quick access to the shared calendar events without adding clutter.
UpTo will send you push notifications when new events are added to a calendar being shared with you. It's the easiest way to stay connected.
Download UpTo (free for iPhone and Android)
Tap 'Calendar Sharing' from the main menu
Select the calendar you want to share and the person you want to share with
The person you're sharing with will receive your calendar sharing invite via email. Once they open the UpTo app, they'll be able to accept your request from their inbox.
"UpTo app for calendar sharing is great for busy families. My wife and I work opposite shifts and the app is a huge help."