New answers tagged iphone
The iSyncFlash app is supposed to do this, by syncing the iPhone's camera to the flash, rather than the other way around (although the current reviews of the app indicates it doesn't work much on phones newer than a 4s). And you may be able to accomplish this with TriggerTrap Mobile, two Android/iOS devices, and a flash adapter; TriggerTrap Mobile uses the ...
Manual control of the iPhone camera was not added until iOS8, and iOS8 cannot be installed on an iPhone 4. So unfortunately you cannot get the full manual control that you are asking for with your iPhone 4. iOS8 can be installed on a iPhone 4s but it isn't exactly highly advised as it can reduce performance of the older iPhones(as new iOS releases ...
I would be surprised an iPhone 4 (not a 4s) support advanced camera controls as it does not allow iOS8. iOS8 offer some additional controls but not in the native camera app; you need to get a 3rd party app like Manual (http://shootmanual.co/).
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