Not too bad but crashes

I bought Maestro and was very disappointed, then got this one and I love it except for two things:
Its very practical and extremely easy to use, but crashes way too much and tells me to close my background apps when there arent any running, as well as everything else incoming off with the wifi as well. Secondly, I noticed that some of the functions, such as trill and fortepiano are greyed out; you can use them but they dont work in playback. I wish that worked. Other than those minor things, this app is totally worth the purchase, and way better than the other apps. iWriteMusicProject, please fix these few things and itd be perfect! Thanks for creating!

maryclarec about iWriteMusic