Hello, I’m investigating an appointment-reminder app for small businesses. The user would explicitly enable the feature and authorize specific clients to receive reminders.
At a scheduled time, the app would send an SMS using the iPhone owner’s cellular number and carrier plan, without requiring them to open MFMessageComposeViewController and tap Send.
I understand that MFMessageComposeViewController requires user confirmation. I also understand that TelephonyMessagingKit is intended for eligible default carrier-messaging apps.
Is there any supported API, entitlement, or approved architecture that permits this use case for a regular App Store app?
If not, would an appointment app potentially qualify for any TelephonyMessagingKit entitlement, or is using a server-side SMS provider the only supported way to send unattended reminders?
The intended messages would only be sent with the business user’s authorization and the recipient’s consent.