I (like others), have had this app and relied on it daily -- but recent updates have rendered it VERY unreliable. The app will either quit during the night or not produce sound during the alarm (when in background). Additionally, when it does work, there is a short (~0.5 sec), loud blast of music before it goes quiet and then starts to ramp the volume as it is supposed to do. PLEASE stop pushing out unreliable upgrades and resolve -- this app has gotten "buggier" with each of the last updates and will soon be in my "deleted" bin.
slci about Alarm Clock HD - Pro, v3.0.4