Where can I create my IOS/Android Wedding App for free?

Hi. My fiancee and I have been trying to find a good tool to let us build an app for our wedding. I've already built our website and now we just want an app that will let our users take pictures within that app (then have those pictures automatically uploaded to our dropbox), manage our wedding twitter account, provide our guests with information about our event and location, and a few other functions that we think will really help our guests and help us chronicle our big day. I've been looking tirelessly and found one site called Appy Couple. The problem is that they charge a monthly subscription and you end up with a cookie cutter app. I want something unique to us though. One of my friends told me about a platform called Rheti saying that it was best app builder she had used. Apparently, they gave her all of the features she wanted (including camera, upload to dropbox, twitter, even augmented reality) and that it was easy and free to create and share her app (no subscriptions). I went to their site and found this blog post: http://blogs.rheti.com/?p=30. I also signed up for their Beta and got a notice that I was on their waitlist. I'm afraid that I won't get my invitation to build my app with enough time before our wedding. Does anyone else have any other suggestions I should look at? Any help would be greatly appreciated. Thanks