I Found a Successful App, Made It 1% Different, and Now Make $12K/Month

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url	I Found a Successful App, Made It 1% Different, and Now Make $12K/Month David Adius, a former quantitative trader, used Cursor and AI agents to build Stopper, a mobile app helping Gen Z women stop sugar cravings. By identifying a massive \$200k/month quitting-app trend... https://www.youtube.com/watch?v=orYTlk_BhW8

TL;DR

David Adius, a former quantitative trader, used Cursor and AI agents to build Stopper, a mobile app helping Gen Z women stop sugar cravings. By identifying a massive $200k/month quitting-app trend (Quitter), David did a screen-by-screen UX clone of their high-converting onboarding flow, changed the target niche from nicotine to sugar, localized the marketing to French Gen Z women, and scaled to $12,000/month in 5 months.

The Founder’s Story

David worked for 8 years as a quantitative trader, writing code to analyze stock movements. Inspired by indie hackers like Pieter Levels and Tibo (Rank Tracker), he developed an urge to build self-sustaining software businesses.

While watching a YouTube podcast, David learned that the three founders of Quitter (an app helping users quit vaping/nicotine) scaled to $200,000/month in just three months of launching. Intrigued by the metrics and the flawless design of their onboarding flow, he decided to replicate their core mechanics but pivot the application to a completely different market.

The “1% Shift” & Niche-Switch Playbook

David’s core strategy relies on cloning the exact user experience, copy framework, and onboarding flow of a massive consumer app, while shifting to an entirely unaddressed niche.

1. Market and Niche Validation

• Google Trends Research: David searched "stop sugar" and "quit sugar" on Google Trends, confirming that search volume for sugar cessation had been climbing continuously for 5 years.
• TikTok & Instagram Search: He verified active organic interest by searching social platforms, discovering thousands of female creators and nutritionists posting about sugar-free lifestyles.
• Target Audience: Gen Z and millennial women (primarily ages 13–25).
• Local Arbitrage: He realized that while sugar-quitting apps existed in the US, there was zero presence or localized marketing in France.

2. The Figma-to-Cursor Cloning Process

• Onboarding Capture: David downloaded the target app (Quitter) and took screenshots of every single screen from signup to paywall.
• Figma Layout Conversion: He uploaded these screenshots into Figma and used specialized plugins to parse the JPEGs into editable Figma design elements.
• Figma MCP Integration: He linked his Figma canvas directly to Cursor using a Figma Model Context Protocol (MCP) tool. This allowed Cursor’s AI model to inspect his Figma layouts directly and generate the corresponding mobile code.
• Rapid Translation: By prompting the AI to replace all nicotine-related copy with sugar-related terminology (e.g., “change black to pink, replace ‘vape’ with ‘sugar’”), David built a fully functional mobile application in only two and a half weeks.

Marketing & Influencer Automation Playbook

Stopper scaled rapidly to 60,000 downloads and 900 paying subscribers using automated influencer outreach:

1. Influencer Scraping: David uses Top Yappers (topyappers.com) to scrape and export contact profiles of TikTok, Instagram, and YouTube creators who have a track record of promoting mobile utility apps.
2. AI Email Outreach: He inputs these email addresses into Lindy.ai (an autonomous AI agent) which writes, schedules, and conducts personalized outreach campaigns to secure partnerships.
3. TikTok Spark Ads: When a French influencer’s organic video goes viral, David launches TikTok Spark Ads to put paid budget behind the high-performing video, securing cheap conversions.
4. Subscription Model: Features weekly, monthly, and free trial subscription options tracked via RevenueCat.

Tech Stack & Cost Breakdown

Key Quotes

• “The fastest way to make some money right now is to do a one-to-one copy of a very successful app… I change black to pink, replace ‘add content’ with ‘sugar,’ and then it’s done.”
• “I validated this by keyword research and by content research on TikTok and Instagram… Quitter was making $200k a month after three months and I was envious.”
• “Right now, with the Figma MCP, you can connect your Figma MCP to Cursor, and before it took me like one month to do the MVP; right now, that would probably take me two weeks.”

Related Frameworks & Playbooks

• the-clone-strategy — Cloning validated up-market software with a niche pivot
• vibe-coding — AI-powered development and rapid MVP creation