Can I find out which iOS apps are no longer available in the App Store? I have hundreds of apps installed on my iOS device. I've noticed that some of those apps do not appear to be in the App Store any longer.

Is there a way to quickly identify which apps I have installed, that are no longer available in the App Store? I'd like to be able to decide which ones I feel like keeping, in an effort to tidy up my device.

(Other than manually searching the store for each one, of course.)
No, there's no way of knowing that Apple offers. 

I'm not aware of any jailbreak apps that can do this, either.