The "wake" app does exactly what you want. No jailbreak required, progressive increase of volume up to the maximum. But, I'm using it because there is a setting that forces you to shake your phone to stop the alarm, and you are awaken almost instantly ;)

The Wake Alarm Clock app does exactly what you want. No jailbreak required, progressive increase of volume up to the maximum. But, I'm using it because there is a setting that forces you to shake your phone to stop the alarm, and you are awaken almost instantly.

The "wake" app does exactly what you want. No jailbreak required, progressive increase of volume up to the maximum. But, I'm using it because there is a setting that forces you to shake your phone to stop the alarm, and you are awaken almost instantly ;)

The "wake" app does exactly what you want. No jailbreak required, progressive increase of volume up to the maximum. But, I'm using it because there is a setting that forces you to shake your phone to stop the alarm, and you are awaken almost instantly ;)