Gratatouille - A elegant dining instrument to properly complement an exquisite meal. That was a mouthful! If the meal was good! Gratatouille has a simple designed interface that quickly helps you figure the gratuity. Simply enter the pre-tax total and BLAMO the tip! Don’t tip too much, if the service wasn’t that great, but slip the slider to 5 stars if you enjoyed the meal and service was outstanding and tip accordingly! Its fun easy to use. Get the latest app from Keith Mobile.