I have the app eBook buffet on an iPhone 4s. The app is a great way to find free Kindle books. The app worked well with VoiceOver until I installed IOS 7. Now the phone freezes when I double tap on a category of books and I have to close the app. I contacted www.weberbooks.com about the problem. The company installed IOS 7 and did not have this problem. Is there anything else I can do? Thank you.