I have used it for a few projects already, for me and my clients. I export mainly for Android but I can also export the project for Apple products (the mobile smartphones). Ask here for a better price that on that platforms and tell me all the details. What kind of appplication and new features do you want? I am asking that because the final price and the developing time depend of the desired feature. The 100 euros you pay for the order through this website is for an mobile app with some features and the price may be rising if there are too many featured added for it. Be as clear as you can about them and tell me all of them before I start developing them becase changing your mind during developing may increate the total time to do things and I do not want to be late or worse, just the best.
I will need some time to develop and test the application for the right price but I can do lots of things for you. Come and ask me about what you need to create new.
I can upload the developed application on my Google store if you don't have an account there but I don't upload into Apple system, I don't work on Apple only on Linux. If you want an Apple application test in there, I will give your the source code in order to compile it there and I will tell you a fre things how o do it.