(2025) Creating a Profitable MBTI Test-Based Website - <Let's Learn Coding and Start a Business>

We will create an ad-monetized website using React. You will learn how to optimize advertisements, reduce server costs, and gain site operation tips according to the scale of your project.

(4.9) 16 reviews

240 learners

Level Basic

Course period Unlimited

React
React
AWS
AWS
cloudflare
cloudflare
adsense
adsense
Google Analytics
Google Analytics
React
React
AWS
AWS
cloudflare
cloudflare
adsense
adsense
Google Analytics
Google Analytics

Reviews from Early Learners

Reviews from Early Learners

4.9

Trial Review

5.0

써미츠

62% enrolled

This is the lecture I've been looking for all this time 😭😭 Even though I wanted to create a profitable service, the information was fragmented, but this lecture tells me everything, so it was a really, really, really big help 😭😭 And it's not just about the development details, but also, It was even better because you explained it based on your experience of operating a service with a lot of traffic, so I understood it better!! Above all, I liked that it was based on stacks that could be started with 0 won. (Of course, it's not completely 0 won like domain costs) I think the real value of this lecture is that I have become 'able' to create and operate my own profit-generating website with the content I learned!!! You also teach me how to respond in different languages, so I will launch a global service and create successful profits. Thank you so much for creating this kind of profitable lecture!

Trial Review

5.0

주말코딩

57% enrolled

"This class is the real deal." There are many courses focused on generating profit, but this is the only course that shows real-world data, explains the development process, SEO, optimization, and various distribution methods. Taking this course is essentially like "starting a startup on your own." I think most software products are probably made through a similar process. You can learn everything from product planning to development, SEO and marketing, and finally, how to connect it all to revenue. I especially recommend this course to those who have self-studied web development. This kind of content is difficult to learn on your own, and you'll realize how much more there is to do even after creating an actual product. As we enter an era where development speed is accelerating with the use of LLMs, background knowledge is becoming even more important. I think this one revenue-generating course is enough. Instead of searching for multiple courses for a small success, listening to the know-how and tips directly from someone who has already achieved success is the fastest way to success. Even if you create a site that generates only ₩200,000 per month, that's ₩2,400,000 in annual income, and at a 5% profit margin, that's a site worth about ₩50,000,000. I think this course will be the first step in creating a site with an asset value of tens of millions of won. I learned a lot!!!

5.0

jaehyun jo

100% enrolled

As I wasn't very familiar with this field, there were parts I didn't fully grasp along the way, but thank you for answering my questions so well. This course provides the framework needed to enable service operation using react. It was truly very helpful for beginners like me. Regarding future monetization, I also felt that there's no easy path as there are many areas to improve and tasks to do. Thank you for the great course.

What you will gain after the course

  • How to create and distribute an MBTI content platform site for free

  • Insertion of affiliate ads such as AdSense and Coupang Partners and revenue optimization

  • Tips for changing your tech stack based on revenue scale

  • Tips for SEO Optimization & Ad Optimization

How to monetize my website? 🤔

"If you don't find a way to make money while you sleep, you will work until you die."
This is a famous quote by Warren Buffett. This also applies to those who program.

In this course, we will build a content-based website optimized for monetization ourselves. Many of you may have started learning development because it was fun or to get a job, but at some point, it might have turned into studying just for the sake of studying, leading to feelings of boredom.

Through this course, let's build a website for generating revenue right away. Experience for yourself that a good service isn't about the difficulty of development, and that you can generate plenty of profit while creating your own service that users enjoy!

I cannot promise that you will automatically generate revenue just by taking this course.

However, by taking this course, you can learn how to use weapons that make money for you.

Of course, there is no such thing as 100%. Anyone who says you can unconditionally make money is either a scammer or just deluding themselves.


But you can increase the probability of success.


Launch fast, validate fast, and monetize fast


This is the attitude we must adopt in an era where even major IT corporations are laying off developers.

And the first step to increasing the odds is 'trying quickly'.


Through this course, we will quickly build and launch a service to validate its profitability.

And you might fail. That is why we intend to start and verify with as close to zero cost as possible.

Through these multiple attempts, we will learn new things and increase our chances of success.


Labor income is important, but we have entered an era where we cannot rely solely on it. It is a time when we need to attempt to survive in capitalism on our own by creating our own services.

We are creating a service like this

MBTI-based Psychological Test Collection React Web App (Web Application)

Link to the K-Test service currently in operation -> https://ktestone.com/

Test List Main Screen
This is the main screen in the form of a YouTube thumbnail list where multiple tests are gathered.

Intro screen for each content
This is the intro screen for each test content that users will share with their friends.

Quiz Screen
This is the unique quiz content screen for each test.

Result Page
This is the most important screen for monetization, featuring Coupang Partners buttons, social sharing buttons, and thumbnails to navigate to other tests.

In the 21st century, we live in an era where traffic equals profit.
And that traffic naturally gravitates toward those with compelling content.

On YouTube, blogs, and Instagram, so many people strive to generate revenue with an overwhelming amount of content. However, as competition intensifies, it becomes harder to establish your own competitive edge, and many end up quitting after a week of effort, thinking, "Maybe this isn't for me."


💡What if you personally created and operated an attractive service that others have rarely attempted?
Solo developers (Indie Hackers) are people who travel the world with just a laptop, earning anywhere from several thousand to tens of thousands of dollars a month on their own. Pieter Levels is the most representative indie hacker (I highly recommend looking him up).


The characteristics and strengths of these successful indie hackers vary, but they all share one thing in common.

Execute fast, experiment fast, and get feedback fast

These are people who prove through their lives the proposition that time is money. If they have an idea, they build it quickly without overthinking, launch it to the market fast, and then receive feedback quickly to make rapid improvements.

It doesn't matter if they fail. This is because they have significantly reduced risk by starting with zero costs through their own coding know-how. Failed attempts instead become part of their portfolio and serve as the nourishment they need to learn for future success.


👍 I hope you will step into the fascinating world of profitable programming with <Learn Coding to Invest: LCI>.
Since 2020, I have incorporated my know-how as an indie hacker for <Fast Execution/Experimentation/Feedback>, gained through repeated failures and successes while trying various services.


In this course, while coding-related content forms the framework for creating a finished product, I have infused it with the underlying know-how for operating a profitable website, so I hope you enjoy it to the fullest.

In this lecture, we will use React (Next.js will be used in the following series of lectures).

This course uses Javascript (Typescript will be used in the next series of courses).

💡In the early stages of the service, we prepare to conduct market validation by focusing on operating the service with as little cost as possible.

💡React, AWS, cloudflare, adsense, Google Analytics and other tech stacks will be covered.

Recommended for these people

I am interested in web monetization.
Those who want to create a web service that actually generates revenue, going beyond just a portfolio.

I want to create my own service.
Those who want to use this lecture as a stepping stone to apply it to various types of profit-generating services

I want fast market testing.
Those who want to quickly build and validate their service in the market to increase the probability of success.

After completing the course

  • You can learn the basics of creating & deploying service sites specialized for content such as MBTI and quizzes.

  • Adsense, Coupang Partners, and other know-how on using advertising solutions for profit will be shared.

  • We will show you how to choose a technology stack for rapid market testing.

  • Without complex server setup, you can safely operate your initial service using only the frontend. Free hosting and CI/CD using AWS and CloudFlare Pages are a bonus.

  • We also teach you how to use Google Analytics to accurately measure traffic coming to our site and increase advertising revenue.

Actual metrics from KTEST, developed and operated by the instructor*

(*Metrics may vary depending on the situation and content, and this course does not guarantee traffic.)


[ Google Analytics Metrics ]

GA Real-time Visitors Screen

GA Visitor Trend Screen

[ Naver Real-time Search Terms* ]

(*As Naver's real-time search word service has currently ended, the image attached is from the past.)

Naver Real-time Search Screen

Naver Real-time Search Screen

[ Exposure on Naver News and Kin ]

Naver News Screen

Naver News screen

Naver Kin Screen

Features of this course

📌 We focus on the content necessary for practical site construction and monetization, rather than technology for technology's sake.

📌 This is not just a follow-along lecture; we code while thinking together about monetization strategies.

📌 Unless it is unavoidable, we will utilize free infrastructure as much as possible to keep costs low.

📌 Sharing source code is standard. The course is updated whenever better monetization strategies are developed.

Notes before taking the course

Practice Environment

  • The lectures are explained based on MacOS. Windows users can also follow along without any difficulty.

  • VS Code is used in the lectures. You are not restricted by the type of editor.

  • AWS / Adsense / Google Analytics / CloudFlare accounts should be accessed using your own individual accounts.

Learning Materials

  • Github repo for the source code and development process covered in this lecture

  • Full course content PDF file

  • JS Code files that can be used immediately by copying and pasting

  • Profitable service ideas and research materials compiled in a Notion page (Update)

Prerequisite Knowledge and Important Notes

  • Basic JavaScript syntax (

    It is not mandatory. This is not a lecture that focuses on grammar and theory.)

  • Basic React usage (likewise, not mandatory. This course focuses on how to implement services quickly.)

  • Basic SQL knowledge (Again, not mandatory. Being able to use Excel is sufficient.)


  • The course will be updated as better monetization strategies or ideas are organized.

  • The copyright for all example content (images, text, etc.) provided in the lecture and all content of K-Test (https://ktestone.com), which is being cloned, belongs to K-Test.

Recommended for
these people

Who is this course right for?

  • People who want to operate an ad revenue site as a side hustle in addition to their main source of income

  • People who want to build their own digital assets that generate income even while they sleep

  • Those who want to apply their development skills directly in practice rather than just in theory

  • People who want to create a content site that is differentiated from blogs, YouTube, etc.

  • Those who want to use this lecture as a stepping stone to apply it to other types of profitable websites

  • Those who want to learn practical programming optimized for solo development

Need to know before starting?

  • Very basic knowledge of JavaScript

  • React Basics (Not Required)

Hello
This is cobaetoo

1,111

Learners

29

Reviews

37

Answers

4.9

Rating

4

Courses

This is Kobatu, .

I am first introducing the profitable programming series, .

I run the [One Month Launch Challenge Club], where we launch one profitable service every month, and the [Cobaetoo Newsletter].

https://maily.so/cobaetoo

Since 2018, I have been conducting financial data analysis and quant programming lectures for financial institutions,

Since 2020, I have been developing and operating , an MBTI-based psychological testing platform.

https://ktestone.com/

More

Curriculum

All

75 lectures ∙ (19hr 58min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

16 reviews

4.9

16 reviews

  • summits님의 프로필 이미지
    summits

    Reviews 1

    Average Rating 5.0

    Trial Review

    5

    62% enrolled

    This is the lecture I've been looking for all this time 😭😭 Even though I wanted to create a profitable service, the information was fragmented, but this lecture tells me everything, so it was a really, really, really big help 😭😭 And it's not just about the development details, but also, It was even better because you explained it based on your experience of operating a service with a lot of traffic, so I understood it better!! Above all, I liked that it was based on stacks that could be started with 0 won. (Of course, it's not completely 0 won like domain costs) I think the real value of this lecture is that I have become 'able' to create and operate my own profit-generating website with the content I learned!!! You also teach me how to respond in different languages, so I will launch a global service and create successful profits. Thank you so much for creating this kind of profitable lecture!

    • cobaetoo
      Instructor

      I'm glad it was a great help in building your revenue-generating service, thank you! Actually, there is a way to get a domain for free, but due to quality issues, I recommended purchasing a domain directly for a few thousand to tens of thousands of won for your service : ) I will come back with more good news and new lecture updates so that you can build services at a more sophisticated level in the future. I sincerely hope you get closer to financial freedom with your revenue-generating service. Thank you again for the meaningful review!

  • weekendcode님의 프로필 이미지
    weekendcode

    Reviews 4

    Average Rating 4.8

    Edited

    Trial Review

    5

    57% enrolled

    "This class is the real deal." There are many courses focused on generating profit, but this is the only course that shows real-world data, explains the development process, SEO, optimization, and various distribution methods. Taking this course is essentially like "starting a startup on your own." I think most software products are probably made through a similar process. You can learn everything from product planning to development, SEO and marketing, and finally, how to connect it all to revenue. I especially recommend this course to those who have self-studied web development. This kind of content is difficult to learn on your own, and you'll realize how much more there is to do even after creating an actual product. As we enter an era where development speed is accelerating with the use of LLMs, background knowledge is becoming even more important. I think this one revenue-generating course is enough. Instead of searching for multiple courses for a small success, listening to the know-how and tips directly from someone who has already achieved success is the fastest way to success. Even if you create a site that generates only ₩200,000 per month, that's ₩2,400,000 in annual income, and at a 5% profit margin, that's a site worth about ₩50,000,000. I think this course will be the first step in creating a site with an asset value of tens of millions of won. I learned a lot!!!

    • cobaetoo
      Instructor

      Thank you so much for leaving such a valuable review. I'm proud and grateful to hear that it was helpful in learning how to build a real revenue-generating website. In the future, I will diligently organize the curriculum and introduce other types of revenue-generating service building processes, such as payment sales revenue, in addition to advertising revenue! I sincerely hope you get closer to financial freedom with your revenue-generating service. Thank you again for the meaningful review!

  • thisiszero님의 프로필 이미지
    thisiszero

    Reviews 3

    Average Rating 5.0

    5

    22% enrolled

    It was great to get exactly what I needed.

    • cobaetoo
      Instructor

      Thank you for the great review! I'm so glad you got what you needed. I hope you get closer to financial freedom with our monetization service. Thank you again for the meaningful review!

  • cinos810120님의 프로필 이미지
    cinos810120

    Reviews 10

    Average Rating 4.8

    5

    100% enrolled

    It's a great lecture. It lays the groundwork for becoming an independent solo developer.

    • cobaetoo
      Instructor

      Thank you for the positive review! I'm so glad you found what you needed. I sincerely hope you get closer to financial freedom with our monetization service. Thank you again for the meaningful review!

  • jojae383220님의 프로필 이미지
    jojae383220

    Reviews 6

    Average Rating 4.7

    5

    100% enrolled

    As I wasn't very familiar with this field, there were parts I didn't fully grasp along the way, but thank you for answering my questions so well. This course provides the framework needed to enable service operation using react. It was truly very helpful for beginners like me. Regarding future monetization, I also felt that there's no easy path as there are many areas to improve and tasks to do. Thank you for the great course.

    • cobaetoo
      Instructor

      Thank you very much for leaving a review. I'm truly glad it was helpful! In the next lecture, I plan to cover how to earn revenue through payments by integrating a payment solution. I sincerely hope you apply it extensively to get closer to financial freedom. Thank you again for your meaningful review!

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