You can create an iOS Calendar item directly from our app, and set the invitees in it, which sends out emails. You do not have to open the iOS Calendar app for it – the item will show on your Agenda/Calendar views in our app. We have chosen not to replicate the email invitation behavior since we have integrated it seamlessly into our app from the iOS and Mac Calendar apps.
When you add invitees to an event or appointment created in our app, we do not automatically send out emails – our app is for your own use in that way. However, you can tap on the email icon in the invitees list to send them an email (assuming the contacts added have email addresses). If they have the app, you can also email the event to someone so that they can accept and create it on their side.
We plan to enhance the sharing and collaboration aspects more in the future.