Add Yahoo as a preferred source to see more of our stories on Google. In theory, tipping should be simple. If you receive excellent service, it's easy to reach into your wallet and offer a tip. But in ...

Tipster is a tip calculator for iPhone. There's no bells and whistles, it's just a simple tip calculator with one job: calculating tips. As anyone even slightly familiar with the App Store knows, ...

With everyone carrying less cash and increasingly depending on credit cards and digital wallets, demand is growing for tech-savvy tools to make tipping easier. With a few quick swipes on a smartphone, ...