I have been using pushover for years https://pushover.net for our nagios and monit alerts.
Can you add direct pushover support to incontrol2 notifications so users can add there apptoken and usertoken and then select which notifications are send to a pushover account.
The pushover is an app that runs on mobile devices that a lot of sys admins use for instant/push alert notifications, it would be faster then sending e-mail notifications.
I know that there is a peplink app for apple only that supports push notifications, but for some reason there is still no android version available. Supporting pushover would be a great help.