App Activation Audio is a Cydia Tweak which will play sounds when you open up applications. Every single time you tap on an application the sound you chose will play and your device will vibrate(if you chose that setting). Within the settings you can set the sound where there are over 20, some of them better than others. You have to ability to adjust the volume of the sound within the settings as well. App Activation Audio can be found in the Cydia Store under the Big Boss Repo for $1.99.