Yeah tried iPad and it works much better. A couple of comments:
On the save bank feature you're not allowed I believe by Apple to go outside the sandbox - this might get he app rejected from the App Store. The save feature will probably need reimplementing
Also connecting to the unit did not work first try on the iPad. Not sure why. Tried a few times, switched off the app and restarted and it worked.
Regarding the iPhone layouts not sure if this will get approved by Apple - they want single finger scroll I believe in their usability guidelines.
Do you have a iPhone simulator? You'll need it to debug it properly as all the screens need work on the layout I'm afraid. I can post screenshots if you want.
Might be an idea to release iPad only to start with if its too much work or focus poilishing that first?
Also minor bug:
When clicking to go back from a screen, the buttons remains highlighted
Finally the log files are not viewable - I'm guessing the feature is not implemented yet. Finally saving the bank does not work - can't see the file in the explorer afterwards.