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How to Create 350 Personal Apps and Achieve 7 Times Your Salary in Revenue

It contains all the 7-year journey and know-how that led to earning 2 to 7 times my monthly salary through 350 apps. Now, it's your turn to be the protagonist.

(4.8) 256 reviews

2,045 learners

  • programmingzombie
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수익화
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Monetization

Reviews from Early Learners

What you will gain after the course

  • App Monetization

  • App Marketing

  • System for prolificacy

  • Boosting App Productivity

  • AI Productivity Boost

I sleep only 4-5 hours a day while creating 350 apps

I achieved 7 times my salary in revenue - here's how I did it!


App development for steady monthly side income

You've probably thought about it at least once.

I also thought that if I just made a good app, the revenue would naturally follow.

However, reality wasn't easy. I barely maintained less than $0.5 in daily revenue for 8 months.

After much time and countless trial and error, I discovered that making money with apps requires a strategy guide.


After realizing that, my revenue started to steadily trend upward.

As the belief that "making money through apps is difficult" is shattered,

You realize the fact that "If I just invest my time, I'll generate that much profit."

Recent revenue status among various apps

Revenue graph for one of multiple accounts

That's how I worked at a company for 6 years while developing personal apps on the side.

In that process, I developed over 300 apps,

As the revenue generated from the app increased from 2 to 7 times my monthly salary

I have now left my job and am able to live comfortably while creating the services I want.

Weekday Han River Picnic 1

Weekday Han River Picnic 2

Situation where we rented out the entire kids cafe on a weekday

An article that well organizes related content through interviews

Now in my 7th year of app development,

During this time, I really made a lot of apps and went through many trials and errors.

In that process, there was also a lot of time unnecessarily wasted,

I hope others don't have to go through such trial and error, so the know-how and strategies I've accumulated

I would like to share this through lectures.


"Why are you sharing such valuable information?"

Many people might have doubts. "Why would you share information that makes money like this? Wouldn't it be more beneficial to keep it to yourself?"

I had the same thought at first too.

Actually, creating lectures was a big challenge for me.

Sharing my know-how means increasing potential competitors. That's why I had many concerns about whether I should create the course and whether I should launch it, from course production all the way until just before the release.


But my blog

As I posted on https://soulduse.tistory.com/106, this path is lonely. Not many people monetize through apps, but now I have a small hope that more people will walk the same path as me.

"But what if the core elements are missing and there's nothing substantial?"

This is proven by 161 course reviews and a 5.0 rating. If this had been a course that simply deceived students with poor content, it would never have received such evaluations.

More importantly, what I want to convey is not simply a 'success formula.' This course is not a 'give you a fish' type of lecture that recommends specific apps or categories. Such an approach can actually be dangerous. Because the moment a particular field becomes known for generating good profits, countless competitors jump in and that market quickly becomes saturated. Instead, what I'm sharing with you is 'how to fish.'

  • Methods for Discovering Profitable App Ideas

  • Effective Monetization Strategy


  • Practical Marketing Know-How

  • A system that creates sustainable income

  • App Mass Production System for Maximizing Productivity


This knowledge has true value that can be continuously utilized even as the market changes.

This course is not a course where anyone can easily earn 10 million won per month.

These days, if you look around just a little, you can see many articles and YouTube videos claiming "anyone can easily earn 10 million won per month."

But isn't that strange?

The idea that anyone can easily make big money literally means that there is no moat of that magnitude.

Such items may be effective before sharing content or in the early stages, but it doesn't take long before countless people quickly start copying them, making items that earn 10 million won per month meaningless.


This course cannot guarantee that you will earn 10 million won per month.

However, what you can gain from this course is clear.

If you make the course content your own and consistently implement it, I believe you can start with $1 in daily revenue and gradually reach meaningful additional income, and eventually even income that exceeds your monthly salary.

Part of the advertising revenue received from Google in October 2024

Part of the advertising revenue received from Google in February 2025

If you're hesitating about the course price

The course fee might feel burdensome to you. But think about it for a moment. If you divide this course fee by 365 days, it's about 1,000 won per day. What I can confidently tell you is that if you practice what you learn from this course, earning $1 per day is definitely achievable. In the end, even if you only earn $1 (about 1,400 won) per day, in one year you'll gain profits that far exceed the course fee.

More importantly, it's about the value of time. I spent 7 long years accumulating this know-how through countless trials and errors. Through this course, you can skip all the endless struggles and inefficient processes I went through at once. Ultimately, this course will be an investment where you pay a cost to significantly save your precious time and energy.

Now is the time to break free from the illusion that "if you just build a good app, profits will naturally follow." The most important truth I've realized through developing countless apps is that no matter how perfectly you create an app with outstanding technical skills, you might not earn a single penny if you don't know how to monetize it.

I will share the countless concerns and struggles I've experienced while developing personal apps. Leverage your precious time and energy!

"Isn't that something you achieved because you're outstanding?"

I worked at companies for nearly 8 years, but I wasn't an exceptional developer. I hardly studied algorithms, and I probably wouldn't have been able to even apply to companies that required coding tests. Since this is what someone like me achieved, those of you with similar or better skills should be able to produce results even faster.

During my 7-year journey, I lived two different lives simultaneously for 6 years: as an office worker and as an individual app developer. My day didn't end even after leaving the office. After returning home and having a brief dinner, I would sit back at my computer and dedicate myself to personal app development.

I endured on just 4-5 hours of short sleep each day, pouring all my passion into app development without even weekends off. You can verify this journey of mine through my blog and GitHub commit history. With the determination to write at least one more line of code every night, I have created over 350 apps.

Through countless trials, errors, and failures, I was gradually able to establish my own framework for understanding which apps can survive in the market and how to efficiently generate revenue. Now, rather than simply creating many apps, I have mastered the method of generating stable income through strategic and systematic approaches.


I will share the countless concerns and struggles I've experienced while developing personal apps.


You'll learn this kind of content

1. Important Mindset for Monetization

No matter how excellent your technical skills are and how well you build an app, monetizing the app is a separate issue. You'll learn what mindset you should approach this with.

2. Monetization methods, marketing methods

If you've worked hard to create an app but don't know how to monetize it or do marketing, you might not earn a single penny. Learn how to monetize and market the app you've worked so hard to create.

3. Optimization Process for High-Volume App Development

How were we able to create 350 apps?

Learn about systems that will maximize app productivity.

This course is currently at its lowest price.

I would like to especially emphasize that this is currently the most affordable time for the course price.

1. Continuous Lecture Improvement

This course will not be a simple one-time content, but a course that continuously develops and grows. Based on feedback from students, we will reinforce necessary content and create additional lecture videos to address frequently asked questions.

[25.03] - Various new course updates in progress to align with the AI era.

2. Reducing Potential Competitors

Sharing my know-how through this course could potentially increase my competitors. This could ultimately affect my revenue as well. In the same context, those who take this course will also face an increasing number of competitors over time.

Considering this reality, the course price will be gradually increased over time. This is not simply for revenue increase, but also a strategic choice to protect the potential benefits of current students. Therefore, I can say that now is the optimal opportunity to take the course at the most reasonable cost.

  • [2025. 03 - 1st Price Increase] 385,000 => 429,000

⚠ We do not offer our own course discounts, but discount events for courses conducted on Inflearn may apply. ⚠

Through a lot of deliberation and effort, I've packed this with substantial content. Creating revenue beyond a corporate salary through solo app development, and furthermore, living the life you want. This journey that took me 7 years - you'll be able to achieve it in a much shorter time.


Moreover, as the burden of development skills has decreased with the advancement of AI, I hope this course will help you in your new challenges.

Pre-enrollment Reference Information

Learning Materials

  • Learning materials format provided: Links, text, PDF, etc.

  • Volume and Capacity: Additional learning materials added by chapter as needed

Prerequisites and Important Notes

  • Personal interest and passion for app development


  • Experience in developing client apps such as Android and iOS

  • The copyright of this course belongs to Infinity Apps, and unauthorized distribution and reproduction are prohibited. The learning materials are also copyrighted, and their use is prohibited for purposes other than personal learning.

Frequently Asked Questions

Q. My development skills are lacking... Can I really make money with apps?

  • A. The biggest misconception about app monetization is that you need 'exceptional development skills'. What I realized while creating 350 apps is that 'strategy' is more important than 'technology' for successful app monetization.

Q. I know how to code, but I don't know what kind of app I should build.

  • A. Don't worry! It's okay if you don't have any ideas right now.

    I'll tell you in detail about the many methods I use to discover ideas.

Q. Do you also teach app development methods and coding?

  • A. This course does not teach coding. There is a reason for this.

    Anyone can create an app, but not everyone can generate revenue from that app.

    For example?

    • You can learn app development knowledge for free just by searching a little on YouTube or the internet. And there are already many good quality lectures available.

    • However, the know-how to actually generate revenue with that app is not something you can easily obtain anywhere.

    This course focuses solely on 'app monetization' and the 'productivity' needed to achieve it.

    • Monetization Strategy and Practical Know-How

    • From app idea discovery to marketing

    • A strategy to maximize app development productivity and increase store visibility

    The really difficult part isn't creating the app, but generating revenue from that app.

Q. Is the app mass production strategy still valid?

  • A. To get straight to the point, it's still possible with the right account type selection.

    • For Android, individual developer accounts created after November 13, 2023, are subject to the restriction that "a minimum of 12 testers must conduct closed testing for 14 days" before app release.

    • Therefore, it has become much more difficult than before to quickly release multiple apps with a personal account.

  • Q. So what should I do?

    • You can open it as a business-based organizational account.

    • To create an organization account, you need to obtain a D-U-N-S number and verify your Google Payments profile.

    • Once D-U-N-S certification is completed, it will be classified as an organizational account and the above testing requirements will be waived.

    • This way, you can prepare for launch immediately without the 12 testers·14 days requirement.

Development Environment Setup (For Reference) operated by Programming Zombie

The content below does not cover app development with the development environment. This is the environmental status of the service I'm currently operating, so please use it for reference 😉

Client

  • Android

  • Language: Kotlin

  • Local DB Management: Room, SharedPreference


Server Deployment

  • Github Action

  • AWS Elastic Beanstalk

Server

  • Spring Boot

  • Language: Kotlin

  • DB Management: JPA

Operating Environment

  • Server: AWS EC2

  • DB: AWS RDS

  • Other services used: AWS Lambda, AWS SQS, AWS Route53, S3

Recommended for
these people

Who is this course right for?

  • Those who want to make additional income through side projects

  • Those who launched an app by themselves but failed to monetize it

  • A developer aiming to grow a side job into a main profession.

  • Those who want to learn an efficient prolific system

Need to know before starting?

  • App development experience or ability

Hello
This is

5,578

Learners

315

Reviews

179

Answers

4.8

Rating

4

Courses

300개의 앱을 개발하여 퇴사를 이룬 개발자입니다.

현재는 인디해커로 활동하며 경제적 독립을 위해

꾸준히 앱을 만들어나가고 있습니다.

Curriculum

All

63 lectures ∙ (6hr 21min)

Course Materials:

Lecture resources
Published: 
Last updated: 

Reviews

All

256 reviews

4.8

256 reviews

  • 한휴르님의 프로필 이미지
    한휴르

    Reviews 4

    Average Rating 4.8

    Edited

    4

    46% enrolled

    수강평을 작성하는 날(25.04.29)을 기준으로 저는 아래와 같이 평하고 싶습니다. [이 강의가 도움이 되거나 필요한 사람] - 모바일 앱을 통한 수익 창출 방법이 궁금하신 분 [이 강의가 필요 없는 사람] - 앱을 만들고 광고를 적용하는 과정이 궁금하신 분 - 앱 개발 아이디어를 얻거나 실전 예시가 필요하신 분 강의만 보고 따라하면 돈을 벌 수 있다고 생각하시는 분들은 절대로 구매하지 마시길 바라겠습니다. 이 강의에서는 그러한 내용이 없습니다. 추가적으로, 강사님과 새롭게 진입하는 사람 간의 환경 차이가 있습니다. 구글 정책에 의해서 2023년 11월 13일 이후에 생성된 개발자 계정은 앱을 출시하기 까지에 추가적인 과정이 많습니다. 이러한 부분은 강의에 없기 때문에 충분한 사전조사와 고민 후 진입하기로 마음을 먹었을 때, 강의를 구매하시는 걸 추천드립니다.

    • 박상권님의 프로필 이미지
      박상권

      Reviews 1

      Average Rating 5.0

      5

      63% enrolled

      "개발만 잘하면 개인앱으로 떼돈 벌 수 있다?" 이 고정관념, 그리고 "앱만 잘 만들어서 출시하면 대박난다!"는 착각, 이 강의 듣고 다 깨졌습니다. 같은 앱이라도 마케팅과 광고를 어떻게 하느냐에 따라 수익이 하늘과 땅 차이가 난다는 걸 깨닫게 되었어요. 이제는 앱 개발만큼 '앱 팔기'도 중요하다는 걸 명심하게 되었죠. 솔직히 처음엔 수강료 보고 "조금 비싼 거 아닌가?" 싶었습니다. 근데 강의를 다 듣고 나니까 드는 생각은 딱 하나: "이건 혜자다!" 어디서도 들을 수 없는 귀한 인사이트와 팁들, 그리고 현실적인 조언들까지. 그냥 강의 한 번 듣고 끝나는 게 아니라, 이걸 자기 걸로 만든다면? 수강료보다 10배, 100배 이상의 가치를 창출할 수 있을 거라 확신합니다. 혹시 수강을 고민하고 계신가요? 망설이지 말고 믿고 시작하세요. "아, 내가 이걸 왜 진작 안 들었을까?" 싶으실 겁니다.

      • 스윈님의 프로필 이미지
        스윈

        Reviews 6

        Average Rating 5.0

        5

        100% enrolled

        많은 인사이트 얻을 수 있었습니다. 감사합니다. 각 분야별로 길어질까봐 생략된 부분에 대해 좀 더 심화된 강의가 출시된다면 재구매 의사 있습니다. IT분야라면 업종에 상관없이 보면 좋은 강의인 것 같네요. 80%인데 마저 들으러 가볼게용

        • 프로그래밍좀비
          Instructor

          따뜻한 리뷰 감사드립니다! 😊 강의가 도움이 된 것 같아 저도 기쁘네요. 말씀하신 대로 이번 강의는 앱 개발의 기술적 측면보다는 수익화 전략에 초점을 맞추었습니다. 각 주제별로 더 깊이 있게 다루고 싶었지만, 핵심 인사이트 전달에 집중하다 보니 일부 내용은 간략화될 수밖에 없었습니다. 추후 심화 과정에 대한 관심도 보여주셔서 감사합니다. 앞으로도 수강생분들께 실질적인 도움이 되는 콘텐츠를 준비하도록 하겠습니다. 남은 20%의 강의도 유익하게 들으시길 바랍니다! 💪

      • namugocps님의 프로필 이미지
        namugocps

        Reviews 1

        Average Rating 5.0

        Edited

        5

        100% enrolled

        그 동안 들었던 강의 중에 인생에 유익한 영상 TOP3위 안에 들만큼 강렬했습니다. 추후 좀비님이 인프런에서 제작하는 영상을 필히 들을 예정입니다 특히 예시로 일기장 앱이나 일기예보 앱 등으로 처음부터 끝까지 서버, 개발툴까지 사용하여 코드도 확인할 수 있는 앱 제작에 대한 구체적인 영상이 있다면 좋을 것 같습니다 (영상이 짧아도 대환영입니다. 어짷이 충성고객은 뭘해도 진심입니다. 또 좀비님이 얘기한것처럼 실패는 무조건 과정으로서 필요하고 처음부터 완벽하게 나올 수 없다고 생각하지만 이미 충성고객은 실패까지 감안하여 영상 제작만으로도 진심입니다.) 또는 요즘 뜨고 있는 무일푼에서 살아남기해서 무자본으로 시작해서 10만원정도만 모이는 프로젝트로 처음부터 끝까지 관찰하여 그 모습을 영상에 담긴다면 어떻게해야할지 감이 안잡혔던 사람도 영상으로 일단 따라하는 것만이라도 큰 영감이 생길 것 같습니다. 예전에 제 친구도 pc방 사용방법을 전혀모르다가 실제 제가 데리고가서 구체적으로 시각화했더니 쉬는날마다 pc방에 살게되더군요 그리고 그 후 친구가 제가 몰랐던 꿀팁을 방출하는 모습을 보고 일단 아주 작은 것이라도 구체화시키는게 중요하다고 느꼈습니다.

        • 억수님의 프로필 이미지
          억수

          Reviews 7

          Average Rating 4.0

          5

          100% enrolled

          전체 강의를 보았습니다. 우선 강의해 주셔서 감사합니다. 제 습관대로 전체 강의를 모두 듣고 다시 강의를 듣는 스타일이기는 하지만, 많은 생각을 하게 하는 강의였습니다. 개발만 바라보던 분들에게 좀서 현실적인 방안으로 접근할 수 있는 식견을 주는 강의였고, 어떻게 준비하며, 어떤 과정을 준비하여야 하는지 개인적으로는 상세히 알려주신 강의 였습니다. 지금 부터 강의를 다시 곱씹어보면서 준비해야겠습니다. 앞으로도 많은 강의 부탁드립니다. ^^

          • 저도 강의가 처음이라 제가 전달하고자 하는 부분들이 잘 전달될지 많은 걱정을 하였는데 한방에 해소되는 느낌이네요! 너무 감사드립니다 ㅎㅎ 그리고 도움이 되셔서 저도 너무좋습니다! 앞으로 앱 개발 여정에 큰 행운이 깃들기를 응원하겠습니다. 👏👏

        $330.00

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