For those who have purchased the MFD app, I really appreciate your patient and support. The MFD has some issues regarding memory usage that could cause it crashing so easily. For months, I was struggling with those issues. It seems that it’s really hard to gain both performance and memory at the same time on such a mobile device running such a complicated program. I was stuck in looking for solutions to the issues for quite a while. Finally I’ve got a break through recently. By recoding the whole data engine, the memory usage is now well controlled. Further more, the app now has a much better performance. I’m working hard to make it done. It won’t be long to bring you the update. Please stay tuned.