Initial platform choice aside, I think this was the right course of action. For three of you (all technical?), launching on two high-quality platforms simultaneously would be asking for trouble. For those of us that don't have our iPad in front of us at the moment, could you explain the Bento IAP is and what we get for that $15?
The app is free and ships with 5 professionally-designed "themes" that can be applied to customize the presentation with different fonts and image filter options. We included an additional 10 themes that can be purchased for $1.99 each, or you can buy the "Bento Box" pack that includes all 10 themes for $15.