Offline Propers Tool for iPhone/iPad

I have just submitted an iOS app to Apple for approval.  It is identical to the app for Android, and it is approved it will be available here.  The app itself is free, but I have to pay Apple a yearly fee of $99+tax to be able to list it in the App Store.  If anyone finds the app useful and would like to contribute to defray this cost, you may make a donation here.