Cant see the functionality advertised in app download page!

On my iPhone 6s, I cant add more guests from the app. The phone number field is empty but it wont let me add my phone # from the app. Near the edit link it says "web only"!

I have been forced to use the desktop application on my computer browser to do even the simplest things like adding more guests.

Kind of surprised by this, disappointed for sure!

KiranKB about Evite: Party Invitation Maker, v2.4.2