Why is there a discrepancy between my sent and delivered push messages?

You can check your sent vs. delivered push notifications in Campaign performance: Automation campaigns by filtering on the KPI columns:

• Push sent
• Push delivered

You might notice a difference between your numbers for sent and your numbers for delivered. 

There are several reasons this can happen:

Contact uninstalled the app

Ometria can't track when a contact uninstalls your app from their device, so a contact might uninstall the app from their phone but remain 'opted-in' or 'unknown' in Ometria. 

This means some push sends don't arrive (sent but not delivered).

Contact opted-out without opening the app

Ometria can't track when a contact opts-out until they open the app on their device.

This means some push sends don't arrive (sent but not delivered).

Contact disabled notifications on iOS without opening the app

Some iOS users have privacy settings on their devices which prevent Ometria from receiving their opt-out information, so Ometria sends push campaigns to devices which have disabled notifications.  

Ometria checks the notification status for iOS whenever a contact opens their app, which can cause delays between sending and receiving confirmation of delivery. 

See also: Opting in to push notifications

Dismissed notifications in iOS

If an iOS user receives a notification but dismisses it (e.g. by swiping it away) before opening the app, Ometria won't receive confirmation of delivery until the contact next opens the app.

Missing token

If a contact manually clears their app's storage the push token can get lost or invalidated, which means that Ometria would attempt to send the notification, but delivery would fail.