iPhone 4 Auto-Lock

3rd party apps do not have access to private iPhone APIs which such an app would require.

guitar tuner and metronome.

When using these apps, set auto-lock to never. Settings>General>Auto-Lock>Never. Just make sure to go back into settings & change this when done or your battery will drain pretty quick.

You're welcome.

3rd party apps do not have access to ANY private iPhone APIs. This is one of the things that Apple checks before they approve an app to be available via the iTunes app store.

The iPhone is Apple's product so Apple is not a 3rd party developer for any software they develop for the iPhone.

A 3rd party app would require access to private iPhone APIs for this so it won't be provided by a 3rd party app. Such a function must come from Apple and Apple only.

This is a user to user help forum only so no one here knows if Apple has anything in the works in this regard. I wouldn't hold your breath waiting for Apple to provide such an option.

This is so so necessary for so many things. LG Arena does this simply - one short press on the 'standby' button. Longer press goes to standby. I can no longer give the phone to a fellow church choir singer's child during the the services to watch a video (8-)#

A really huge negative amongst so many positives, and so easy for Apple to implement.