Missing Calendar Sync - too early to release

Ive been looking forward to this app for some time. It works well and does what it should with one exception.
The developers have not integrated with the native calendar on iOS. This means that your shifts to not move to your iOS calendar. They stay "trapped" in the app.

"Sharing" your calendar, as they describe, is a screen capture image of Shifts that you can message to people.
"Sharing" would be so much easier if it just integrated into the native calendar app, where I already have iCloud sharing already set up.

Bothinator about Shifts – Shift Worker Calendar, v1.0