Gerenciador de Anúncios is a app that allows you to split a bill and calculate the amount per person, including the tip.
Enter the check amount in the "Amount" text field. Select the number of people from the "Number of people" picker. Select a tip percentage from the "Tip percentage" picker or tap the "Custom Tip" button to enter a custom tip percentage. The "Amount per person" and "Total amount" sections will be updated with the calculated values.