With Fipper, the tip calculator, you can quickly and easily figure out how much to tip based on the total food and drink cost excluding tip. Simply type in your totals, move the sliders and Fipper will do the calculations for you. What is a "Fip" is ask? Well, we cant let the cat out of the bag on that just yet. Once we have enough "Fips", we will release an updated version of the app that will let everyone in on the Fipper secret!