Pre-work – TipCalculator

TipCalculator is a tip calculator application for iOS.

Submitted by: Rohit B.

Time spent: 2 hours spent in total

User Stories

The following required functionality is complete:

☑️ User can enter a bill amount, choose a tip percentage, and see the tip and total values

☑️ User can select between tip percentages by tapping different values on the segmented control and the tip value is updated accordingly

The following optional features are implemented:

❌ UI animations

❌ Remembering the bill amount across app restarts (if <10mins)

❌ Using locale-specific currency and currency thousands separators

❌ Making sure the keyboard is always visible and the bill amount is always the first responder. This way the user doesn’t have to tap anywhere to use this app. Just launch the app and start typing

The following additional features are implemented:

☑️ User can pick a party size to split bill amount evenly

☑️ Display the amount of money each member within the party will have to contribute

Video Walkthrough

Here’s a walkthrough of implemented user stories:

GIF created with EZGIF.


Understanding and implementing code in Swift absorbed majority of the developement time. The syntax took a bit to get used to however became intuitive shortly after. Required a lot of research and patience to implement the features deemed to be necessary to make the application look pleasing. Overall, it was a very entertaining and rare opportunity to develope an application for iOS devices.


Copyright 2022 Rohit Barua

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.


View Github