[itafroma]

> It has fallback to SMS functionality, but SMS apps are rejected from the Apple App store.

Which guideline are you thinking of? My search for "SMS" only found two unrelated guidelines:

> 1.1.6 False information and features, including inaccurate device data or trick/joke functionality, such as fake location trackers. Stating that the app is “for entertainment purposes” won’t overcome this guideline. Apps that enable anonymous or prank phone calls or SMS/MMS messaging will be rejected.

> 3.2.2 (iv) Collecting funds within the app for charities and fundraisers. Apps that seek to raise money for such causes must be free on the App Store and may only collect funds outside of the app, such as via Safari or SMS.