Flutter Tip Calculator App Source Code

A tip calculator can be a useful tool when it comes to calculating the percentage of the bill that you should leave as a tip. A simple way to calculate this is by dividing your total bill by 10 and multiplying that number by two. For example, if your total is $37.50 then $3.75 would be an appropriate amount for tipping on such a bill, which equals 15% of the total cost or 18%. This works well for many different sized bills but you may need to adjust accordingly depending on how much more than 10% over or under 10% you want to pay in tips. The tip calculator also allows you to easily input any other numbers if they are not included in the calculation and calculates what percentage it equates too

This is a simple calculator app written in Flutter.


  • Tip calculator screen with result in AlertDialog.
  • Wave Curved AppBar.
  • SharedPreferences to load/save percentage of tip.
  • Share plugin which wraps the ACTION_SEND Intent on Android and UIActivityViewController on iOS.


Calculate the tip easily and give it to your waiter in a flash. Simply type in how much you owe, tap on the percentage of the gratuity you want to leave for drinks or big dinner parties and Flutter Tip Calculator does all the work for you!

The sleek design makes calculating tips easy and interactive which is perfect for busy waiters with too many tables (unless they are insanely good at math).

You can even add text notes to your tabs so that everyone knows what’s going on while aiding small-talk with our friendly servers! Thanks to its smart functions such as percentage detection, share function, saved settings across devices via shared preferences file, tipping will be quick now always.

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