Normally your iPhone or iPad will dim or turn off the display in 20 seconds or so to limit battery drain. To be an effective clock, bnClock doesn't allow your iPhone or iPad to go to sleep. Because of this, bnClock will run down your battery.
It is strongly suggested that you use bnClock for extended periods while your iPhone or iPad is connected to a charger.
To be an effective clock, bnClock doesn't allow your iPhone or iPad to go to sleep so that you can continue to see the clock display. As a result, bnClock will run down your battery.
Some quick tests show that
You may see better or worse performance with your device.
You can turn off the reminder in the Appearance Settings
It's a feature we've thought about, but to date, not many users have asked for it. If we receive enough requests, we will consider it.
Meanwhile, there are quite a few free apps (but most have in-app purchases) that provide this capability. A search for "sleep sound" in the Apple App Store will give you quite a few choices.