I found a successful app, made it 1% different, and now make $12K/month

Key Concepts:

• App Cloning Strategy
• Niche Switching
• Market Validation (Google Trends, Social Media Research)
• AI-powered App Development (Cursor, Rocket)
• Subscription Model (Mobile Apps)
• Influencer Marketing
• Tech Stack for Mobile Apps (RevenueCat, Mixpanel, Firebase)
• Profit Margins
• Indie Hacking

David Adius's Journey: From Quant Trader to Successful App Cloner

The video introduces David Adius, a former quant trader from France who, six months prior, held a regular job. Inspired by successful indie hackers and an app making $200,000 per month, he identified an opportunity to clone a successful mobile application. Within a few weeks, he "vibecoded" a one-for-one clone, changing only the colors and switching the niche. This strategy led him from $0 to $10,000 per month in revenue within six months. His current app, "Stopper," now generates $12,000 per month, having been built five months ago, with the initial cloned app generating $5,000 in its first month.

The "Stopper" App: Niche, Functionality, and Performance

David's app, "Stopper," is a mobile application designed for women aged 13 to 25 (primarily Gen Z) to help them stop "zog" (likely referring to sugar cravings or a similar habit). The app operates on a subscription model, offering weekly, monthly, and yearly plans, all with a trial period.

Performance Metrics (after 5 months):

• Downloads: 60,000
• Paying Customers: Approximately 900
• Monthly Revenue: $12,000

Inspiration and Background

David's career began as a quant trader for eight years, where he assisted traders in identifying stocks. His entrepreneurial shift was sparked by the success stories of indie hackers like Peter Level and Tibo from Rank and Jack (creators of PB Bridge). A pivotal moment was watching a YouTube podcast featuring the three teenage founders of "Quitter," an app that achieved $200,000 per month in revenue after just three months. This success, which David admitted made him "envious" and "jealous," motivated him to start his own app development journey.

The Cloning Strategy and Validation Process

David's core strategy involved taking a proven app and making it "1% different" by switching its niche.

Finding and Validating the Idea:

1. Discovery: He found the "Quitter" app on YouTube and was impressed by its rapid success ($200,000/month in 3 months).
2. User Experience Analysis: He downloaded the "Quitter" app and was particularly "pleased by their onboarding," which he then "did one exact copy of" due to its effectiveness.
3. Niche Validation (Quitting Sugar): To confirm the viability of the "quitting sugar" niche, David employed two key methods:
   • Google Trends: He searched for keywords like "stop sugar" and observed a consistent upward trend over the past five years, indicating growing interest.
   • Social Media Research: He checked TikTok and Instagram, finding "a ton of women influencers" discussing quitting or stopping sugar, further validating the market demand and audience engagement. This confirmed that "making an app to stop sugar craving was potentially a great idea."

Building "Stopper": A Rapid Development Process

David's approach to building "Stopper" was highly efficient:

1. Screenshot Analysis: He downloaded the "Quitter" app and took screenshots of every screen to understand the user flow and visual elements.
2. AI-Assisted Design & Development: He used Cursor (an AI coding tool) to replicate the screens, instructing it: "Please make the same screen with the same visual elements with the same color with the same image."
3. Rapid MVP Creation: He completed a full copy of "Quitter" in just two and a half weeks.
4. App Store Submission: Gaining approval from Apple for the first version of the app took an additional week.

Playbook for Cloning a Successful App in 2025

David outlined a step-by-step playbook for anyone looking to clone a successful app today:

1. Find a Successful App: Identify an app that targets a specific niche and region/country.
2. Confirm Revenue: Utilize tools like Sensor Tower to estimate the app's monthly recurring revenue, ensuring its financial viability.
3. Research Niche Viability: Conduct keyword research on Google Trends and content research on TikTok to validate if the chosen niche is worth building for.
4. Build Designs:
   • Download screenshots of the target app from websites like appscreen.com and mobbin.com.
   • Import these JPEG screenshots into Figma using a plugin. David notes that this process yields "near perfect" designs for 80% of screens, with minor discrepancies.
5. Implement Backend (if necessary): For most apps, a robust backend might not be needed, but if it is, Firebase is recommended for its ease of managing connections with Google, email/password, and Apple settings.
6. Accelerated MVP Development: Leverage modern tools like Figma MCP (Mobile Component Pack) connected to Cursor. This combination can reduce MVP development time to approximately two weeks, compared to the one month it took David initially.

Tech Stack and Operational Costs

David provided a breakdown of the tools and platforms used for "Stopper":

• V-code (AI Coding): Cursor
• Revenue Tracking & Analytics: RevenueCat (for deeper user analytics) and Mixpanel.
• Influencer Discovery: topyappers.com (a SaaS tool that scrapes TikTok, Instagram, and YouTube to find relevant influencer profiles who have previously worked with other apps).
• Email Outreach: Lindy.ai (used to automate outreach to influencers whose emails are sourced from topyappers.com).
• Advertising: Meta ads and Spark Ads on TikTok (a feature to boost views for viral videos).

Operational Costs (Monthly):

• Cursor (Ultra Plan): $200
• Mixpanel: ~$100 (last month)
• TikTok Spark Ads: ~$100
• Total Estimated Monthly Cost: ~$400

Profit Margin: After five months, "Stopper" maintains a 35% profit margin.

Key Advice and Conclusion

David's primary advice for aspiring app developers, or his younger self, is: "Fastest way to make some money right now is to do one-to-one copy of a very successful app." He emphasizes copying "each screen" and "each word," illustrating with his own example: "I change black by pink. I replace add content by sugar and then done."

The host, Pat Walls, agrees with this approach, stating it's "totally okay to copy an app" and "the right thing to do, especially when you're starting out." However, a crucial caveat is added: "don't copy the niche." The goal is to switch the niche to avoid directly competing for the original app's customers, thereby creating a new market opportunity.

The video concludes by highlighting the power of AI in app development, enabling ideas to be transformed into working applications faster than ever before. David's success story serves as a compelling framework for leveraging proven principles and AI tools to build successful businesses quickly.