So I wonder if you have developed the app yet. It should take some time but I think 9 months is long enough. I myself have been using other apps to transfer data. And depending on your needs, you are able to choose to transfer from iPhone to Mac or Windows PC, or you can choose a phone to phone data transfer app that enables you to transfer data from Android to iPhone or vice versa.
So I wonder if you have developed the app yet. It should take some time but I think 9 months is long enough. I myself have been using other apps to transfer data. And depending on your needs, you are able to choose to transfer from iPhone to Mac or Windows PC, or you can choose a phone to phone data transfer app that enables you to transfer data from Android to iPhone or vice versa.
transfer data from Android to iPhone