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Goodcha: Designing a Trusted and Personalized O2O Car Care Experience

2 Months
work type

Designing "Goodcha Experience": Your Personal Car Care Advisor


Goodcha is a Korean-language based online-to-offline (O2O) service that offers professional car care advice and a mobile application for car owners.


Clouthe9, a South Korean-based car maintenance service provider, offers top-notch regular maintenance visits by experienced technicians. The company wanted to expand its service offerings by providing a mobile app that would allow users to access professional car care advice, make bookings, and manage payments all in one place.


The main challenge was to design an O2O service and mobile app that provides professional car care advice, a personalized experience, essential information, and confidence in payment for car owners in their 30s and 40s who lack expertise. The target audience often struggles with finding a trustworthy professional to entrust their car with and feels overwhelmed with the amount of information they need to know to take care of their own car.

Users & Audience

The target audience for Goodcha is car owners in their 30s and 40s who lack expertise and experience in car care. They are tech-savvy, busy individuals who want a convenient and easy-to-use app to manage their car care needs.

Roles & Responsibilities

My role in this project was to conduct user research, create wireframes and prototypes, collaborate with the client's in-house developer and VP, conduct user testing, and ensure consistency in branding and visual design. My team consists of me and my assistant designer.

Scope & Constraints

The project aimed to design a user-friendly mobile app for car care advice and services within a 2-month timeline. User testing was conducted throughout the design process, but not on the final design due to time constraints. Additional features and product offerings were added during the project, and some technical limitations were encountered. Our team closely worked with the client to deliver a solution that met their objectives within the project's constraints.

Outcomes & Lessons

We successfully designed an O2O service that delivers tailored and relevant content and recommendations to car owners. We learned that car owners in their 30s and 40s struggle with trust and information overload. We applied a branding strategy that positions the service as a trusted and professional advisor, allowing users to have confidence in the service. We created a design solution that addresses users' concerns and pain points through MVP designs. We anticipate that further user testing will verify the effectiveness of our design in the future.

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Project Process


Research and Audience Analysis

Conducted a user survey and created user personas.


Branding and Positioning

Developed a service positioning strategy and created a mood board.


User Experience Design

Developed an information architecture and user flow, created wireframes, developed an interactive prototype for user testing, developed design principles, wrote UX copy, and designed UI components.


Design Specification and Handoff

Documented design specifications on Zeplin for the development team to follow.

For more about the design process, please contact me separately.

App Flow Charts
Designing Low-Fi Wireframe
Building Interactive Prototype
InVision Prototype for User Testing
Hi-Fi Page Production
Zeplin Dashboard
Zeplin Flows
Zeplin Color Palette
Zeplin Text Style Catalog
Zeplin Spacing and Layout
Example of page details


Tony Baek
Leader, Designer @ Hi-Fi Design Studio
Noah Choi
Assistant Designer @ Hi-Fi Design Studio
San Kim
VP @ Clouthe9
Hyunjin Yang
App Developer @ Clouthe9
Thank you.
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Execution is my mantra.
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