Jooyoung Joung


TapTip app helps users with tip calculation and educate them about American tipping etiquette.


I have been living in the U.S. for about 6 years. Most people might assume I know everything about American culture since I have been living here that much period. However, I still question a lot of things, and tipping etiquette is one of them. The country, South Korea I came from doesn’t have tipping culture at all.

I sometimes struggled and felt awkward in a certain tipping situation since I had a lack of experience. So, I thought it would be very useful if there is a tip calculator educating travelers, international students, and foreign workers in the U.S. about American tipping etiquette. So, I gathered another designer and developer. We have been remotely collaborating TapTip app since.

Year: 2019

Type: Personal Project

Duration: 3 months

Design: Jooyoung Joung, Sonia Yang

Development: Chris Chang

Tools Used: Figma, Adobe CC

Tipping culture around the world

We wanted to see if there is enough market opportunity. We discovered that the most countries in east asia and the south pacific area don’t have much of a tipping culture. We decided to scope people from those countries. It was very interesting because other continents tend to share the similar tipping customs.

Narrow the target audiences

We wanted to check if there would be enough numbers of users who are in the U.S who come from those east asia and south Pacific area. I researched which countries sending the most people to the U.S. We found out that mostly east asian countries, China, Japan, South Korea, and Taiwan, are on the list. This validates that there is potential users for our new product. Since, our target audiences come from mostly emerging countries, we decided to make the android app which is the most popular in those countries.

Concept Validation & User Research

We wanted to validate if this conceptual idea applies to the audiences from those countries, China, Japan, South Korea, and Taiwan. With that said, we conducted a Google form survey with key questions on 67 people from those countries to get the quantitative data. We found out that many people, such as travelers, international students, and foreign workers want to understand for American tipping etiquette and they would use the app if it educates them.

Tipping Scenarios Optimization

We figured out the 4 tipping areas, which are Restaurants, Transportation, Hotels, and ETC base on the data we got from the 67 users. We optimized the top 4 services user picked under each 4 areas.

App Flow

Once the new user opens the app, they walk over location permission and quick tutorials. Geo-location permit helps automatically embed the sales tax on the tip calculation depends on the user’s region. Then, a user go through the quiz and then input the subtotal of the service, and then it brings the tipping amount conventions on the different types of output pages reflected from various tipping scenarios.

Also, the user can change the tip amount by moving a slider. If a user wants to learn more about the tipping etiquette of the service, they can go to Tips for Tips page. Also, user can share the tip etiquette with other people by sending the text including tip info.

Style Guide

We applied 6:3:1 color rules base on the dark theme for more sufficient color contrast. 60% Dark Gray, #121617 30% Gray, #1E2223 10% Money Green, #00FFB4 (Accent)

This rule improves the legibility specifically for this type of heavy number driven design (There is proven research). Sufficient color contrast between foreground and background help the user to read the numbers easier. Also, carefully designed the outlined- iconography to get along Montserrat font for the overall design consistency.

We have 3 different types of output pages depends on the scenarios. The type A includes the total and the suggested tip amount slider. The type B has the suggested tip amount ranges. The type C has the suggested tip amount slider. They all link to the Tips for Tips page.


Simple user flow and the intuitive interface designs improve the seamless tip calculation in a wide range of tipping scenarios.


Next Steps

Our next goal is monetization from the app. We are researching possibilities for opportunities. There are number of things we try to add like viewing exchange rates with a preferred currency, tip etiquette for the different countries, and etc. We are keeping all the processes recorded as well, so that we can use the strategy and method for future iterations and other projects.

Wanna explore the TapTip App?


Visual Design


Product Design


Product Design