For those running versions of Android higher than 5.0, please enable our Notification listener under Settings > Sound and notifications > Notification access.
For those running versions of Android LOWER than 4.3, this option requires that you enable Enhanced SMS & Caller ID's accessibility service from within the Settings > Accessibility > Services menu.
For those on Android 4.3 or higher (until Android 5), do not enable the Enhanced SMS & Caller ID Accessibility service.
Instead, you need to enable Notification access for Enhanced SMS & Caller ID in Settings > Security > Notifications access. See screen shots below.
From your device Settings menu, select Security ...
Then choose Notification access ...
Finally, add a checkbox to our apps entry.