Set time range for sounds?

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Hi everyone,

At the moment I have my 4S set to play sounds when various things happen, such as getting an email. What I'd like to do is configure a time range around when those sounds can play. For example, I don't want to be disturbed by email between 11 pm and 7 am, but if I get a call then I still want the phone to ring.

I've had a look around for apps but I'm not sure what to search for. Does anyone know the name of an app that can do this sort of thing? Or is there a built-in feature that I'm not aware of?

Thanks

 

[Nermal]

I've found an app called AutoSilent that looks like it may do this, but it's not free. Has anyone here tried it? There are comments that it may drain the battery

 

[Nermal]

I never tried AutoSilent but it looks like this is coming in iOS 6