LG Wireless Phone

Can someone recommend a good tip (gratuity) calculator for the Samsung A900 wireless phone (Sprint PCS)?

Please - no wiseguy answers about how easy it is to figure 10, 15 or 20 percent. I usually tip 18%.

Public Comments

1. You can't figure out 15% - 20% in your head????? I don't think you need a cell phone. It's beyond your capabilities.
2. I can't, but it's pretty easy to do in your head. Example: 10% of a $25 tab is $2.50. If you want to leave 20%, it's $5... why would you want a program to work it out for you?