Doesn't work in standby mode. – Rain HD Review

This app is a battery killer. Very bright screens mean that to use this at night while you sleep the iPad must be plugged in otherwise this app will kill your battery in under 4 hours - if your even able to sleep considering how bright the lit screen is. You can't multitask. You can't hit the standby button. Your only option is to plug in, hit start, and set your iPad face down against something non reflective..... i.e. a waste of your time.
Review by TimKerrick on Rain HD.