Exactly. Select the first one and it will stay on until you manually turn it off. The 2nd one will automatically turn it off in the morning.
There a 3rd option in settings that allows you to select a specific duration. Imagine, if you sleep at day and work at night, it will be helpful
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No the last version of facebook is really really smooth, here on iOS 9.3 beta 1... the fact is that it wasn't on beta 2...
That is the reason to talk about facebook... If even there it was smooth imagine the rest.
I'm telling you, beside battery drop, the beta 1 was even better than 8.4.1.... they had finally fixed all the lag, and then, the 2nd beta comes out and #$%@s it again...
Just hopping that they will keep optimizing it till the final release