thanks for touching base with our customer support team, it is an issue we just saw with the release of the new iOS 7 and weve chased it and fixed it. We plan to post the update to Apple for review this weekend or early next week, in the meantime please use this easy fix: quit the app from the iPhone app switcher (bring up the apps running in background and quit iAccount by swiping upwards on its snapshot screen) and relaunch it to bring the keyboard up, no need to restart your iPhone. Update coming soon, apologies for the inconvenience, in case you may even consider switching to the A-Z password scheme in iAccounts, which is not affected.
Rotornut about iAccounts password manager- free backup application included, v3.3