How it works
Inside the G.E.M A.I. app the whole task takes a few seconds. This page explains the steps; the calculation itself happens in the app.
- Step 1
Enter Your Bill
Enter the exact restaurant bill amount.
- Step 2
Select Your Currency
Choose the currency used for your bill. Your choice is remembered.
- Step 3
Choose Your Tip
Select a preset percentage or enter a custom percentage.
- Step 4
Get Your Answer
G.E.M A.I. immediately displays the tip and total.
The maths
Tip = Bill × Percentage ÷ 100
Total = Bill + Tip
Example: a bill of 86.42 at 18% gives 15.5556, rounded to the currency's precision as 15.56, for a total of 101.98. Every amount is computed with exact integer arithmetic and independently re-checked before it reaches the screen.
Splitting the bill
In the app, open Split bill and enter how many people are sharing. The per-person amount appears alongside the total, and closing the panel returns to the single-total view.