We found an undocumented error in iOS8 and have sent a report to Apple. The app doesn’t function as expected with iOS 8. That’s why we temporarily removed it from sale. We will try to workaround the issue.
The app doesn’t support the iPhone 6 yet. The reason is that i don’t have an iPhone 6 to test and calibrate. As with every new device, it will take some time to test, calibrate and implement the camera sensor.