My feedback isn't so great, so I will leave it here first. Perhaps if these items are resolved, I can post something more positive on itunes.
First page:
Entering my name, it doesn't use the "name" auto-capitalization. This is like one click in IB to set this... why wasn't it done?
When I finish entering my name, I tap the email address field to enter that... and the whole view slides up, so that I can only see the lower half of the text box I am typing in. This is 100% reproducible. How does this slip past?
Now I am setting up a message to send. I tapped like mad in the "to" field trying to get something to happen- oh wait, there is a button below that I need to press. Why? When I am composing mail in the native app, I interact directly with the "to" field. This is minor, but confusing.
Now I tap the "privacy policy". Huh? I just left the app and went to a web site. Why? Oh well, I am sure that if I restart the app, the message I was working on will be there. Nope. It's gone. Start over. I never even read the dang privacy policy anyway, since the web page format wasn't suited for the iphone. I would have had to zoom and scroll.
So I look at the other features instead. The grab one looks interesting... but does every user know how to do a screen capture? This was something I hadn't learned until I had my phone for a couple of months.
At that point I bailed out. As did I am sure many of your users. Sorry to be so critical, but hopefully you see this as constructive. If these issues are resolved, I will be happy to leave a positive review on itunes...