This app, feature wise is one of the all time best iOS email clients, its incredibly versatile and up until recently, quite stable. Im not exactly when it moved from a "every so often" to an "almost every time I use it" but the bugs, glitches, freezes and hangs are growing so numerous I can barely stand using the app now. Ill likely solider on because the features it provides are so good for my work flow but man, its get painful. Please take a look at your tech debt and divert some energy into code quality and QA effort. I really want this app to keep growing getting better!
Dr. Mega-cool about Airmail - Your Mail With You, v1.5.1