Allahu Akbar, Asalaam Alaikum
Thanks be to ALLAH for all your work and efforts in providing such a wonderful app. Insha ALLAH you will have many blessings for your work.
I am writing this not only to give Thanks to ALLAH (SWT) for inspiring you to do such good works, but also to mention that you might consider checking out-
Hear the Quran by Yusuf Ali narrated by Aurangzeb Iqbal
You can hear a sample of it here http://www.quraninenglish.com
It is a very well done English narration and perhaps a little more accurate and moving than the current English narration in your Muslim Pro app. Insha ALLAH you will find this to be of help to your efforts. May ALLAH (SWT) be pleased with you and yours. Wa Laikum Salaam. ALLAHU AKBAR