In both the current iOS beta 4.5b37 (405037) and the previous build, 1Password crashes as soon as it tries to start, immediately after it brings up the master password prompt and before I can start typing. This behavior persists, even after killing the app (swiping up in the app switcher) and after restarting the iPhone.
I'm running an iPhone 5S on iOS 7.0.4.
The first time it crashed was earlier today when I started the app for the first time in a while, and right as it started to receive a phone call. The phone kind of locked up for 2-3 seconds before the new call screen actually showed up (the only indicator of activity was that the AT&T network icon changed from LTE to 4G, which always happens as soon as a call starts to come in).
After I answered and then subsequently hung up the call, it brought me back to 1Password, which immediately displayed a modal dialog telling me that the app had crashed and asking me if I wanted to report it. I hadn't seen the app actually crash, but I went ahead and selected the “yes, always report” option.
Then the app crashed, kicking me out to the iOS springboard. After that, I never received another error or prompt again, but it just crashes every time it tries to start.
I have also tried manually reinstalling from HockeyApp, but that doesn't help either. Before I completely delete and then reinstall, is there anything else you would like me to do to get you more information on the crashes?