Eh, it doesn't seem to me that "people in the San Francisco area with access to an iOS device" is much of a market restriction. Also, as you said, this is not

Eh, it doesn't seem to me that "people in the San Francisco area with access to an iOS device" is much of a market restriction. Also, as you said, this is not either/or. If the lead was most comfortable with iOS but could also make a web app with a little more doing, then why not launch on iOS and then make a web app once the extra doing is taken care of?