TipCalculator

• User is displayed the tip of specified percentage for specified entered amount
• User enters the total amount of the transaction
• User can select between tip amounts (i.e 10%, 15%, 20%)
• Upon selecting tip amount, formatted tip value is displayed
• (Optional) User changes the total amount and updated tip is reflected automatically
• (Optional) User can select custom tip percentage if desired
• (Optional) User can select how many ways to split the tip
• (Optional) User can edit preset tip percentages and have them persist across launches
• (Optional) Experiment with trying input widgets to replace the buttons and/or textviews
• (Optional) Improve the user interface and experience by using images and/or colors

Walkthrough (From Nexus 10):