One limitation of any application that uses custom fonts is that that font cannot be copied or used in any other app on an iOS device. Due to some research, this limitation can be overcome. Now, Braille can be copied between apps on all iOS devices.
Look for the AppBraille technology In all future releases of VisualBraille, VisualBraille Lite, PocketBraille Reference, and PocketBraille Lite. Plus some new AppBraille specific apps that include AppBraille Explorerer, and AppBraille editor.