I Built a $20K/Month Mobile App: Here’s My Entire Playbook — Starter Story

Mal Baron
- Background and origin story
  - Finance major with no tech background
  - Discovered AI in 2022 and taught himself coding and AI
  - Built an adult content AI app in January 2025 but felt “disgusted and disappointed” with the result
  - Pivoted to Christian apps to reconnect with his faith
  - Spent 3 months building apps nobody wanted before finding his winning idea
  - Discovered an existing app called Praycreen that blocked phones until prayer
  - Believed he could execute better in design, features, and distribution
- Business growth and current status
  - Built Prayer Lock in June, took only 3 days to code with AI tools
  - App reached #22 in the reference category on the App Store
  - Closed December at $21,000 in monthly sales (up from $15K previous month and $10K in October)
  - Growing at over 50% month-over-month
  - On track to hit $40K in January
Products and Offerings
- Prayer Lock - Christian app that blocks your phone until you pray
  - Users select which apps to block (or block everything)
  - When attempting to open a blocked app, users answer two questions: “How’s your relationship with God today?” and “How are you feeling today?”
  - App generates an AI-powered personalized prayer based on responses
  - Users must recite the prayer to unblock their apps
  - Features streak tracking and a Bible verse of the day
  - No authentication or database required - all data saved on device to reduce friction and costs
- Subscription model
  - $49.99/year or $9.99/week
  - 43% conversion rate from download to paid
  - $23.60 revenue per paying user
Metrics and Financials
- Downloads: Nearly 58,000 total
- Reviews: 6,700+ with 4.9-star rating
- Review rate: Over 12% (described as “one of the best onboarding rates in the world”)
- Total proceeds: $41,000 to date
- Current ad spend: $360/day
- December ad spend: $9,000
- Cost per trial: $1.88
- Profitability: Generating significant profit from paid ads
Strategy and Growth
- Initial organic growth
  - Posted 40 times a day across 12 different accounts to find what worked
  - Discovered success with UGC (user-generated content) girl reaction videos featuring app demos
  - First breakthrough came after 40 posts when finding a working hook
  - Posting twice daily on one account generated 10K views/day, reaching first $1K/month
  - Hired additional UGC creators to scale
  - Reached $1,500 in July and $2,400 in August with two accounts
- Influencer marketing attempt
  - Tried hiring an influencer - resulted in a flop
- Paid ads journey
  - First paid ads attempt failed: optimized for downloads instead of trials, had poor onboarding
  - Upgraded onboarding from 5 minutes to 15 minutes, adding value and storytelling
  - Saw organic conversion rate increase more than 3x
  - Started with Meta ads at $20/day, getting $10/trial
  - Switched to TikTok ads with broad targeting (US only) using top UGC reaction videos
  - Got $4/trial with $50 yearly subscription - decided to go all-in
  - Threw $4,000 in savings into ads, closed October at $10K
  - Hired a 15-year-old UGC creator whose videos consistently got 10K+ views
  - Tried TikTok Spark Ads on the creator’s organic videos - results were “insane”
  - Got $3/trial with creator’s videos, invested another $6K, reached $15K in November
  - Continued increasing ad spend weekly, closed December at $20K
- 2026 Playbook (his advice for starting over)
  - Step 1: Find niches with apps making over $50K/month using Sensor Tower for revenue estimates
  - Step 2: Pick an app you like and improve it substantially
  - Step 3: Code it in less than 2 weeks (set a hard limit to avoid endless iteration)
  - Step 4: Don’t touch the app - obsess over distribution instead
  - Step 5: Copy working formats in your niche, post at least 20 times/day
  - Step 6: Iterate on onboarding obsessively until achieving 10% download-to-trial conversion rate
  - Step 7: Run paid ads on organic videos getting more than 10K views
  - Step 8: Prefer TikTok Spark Ads over Meta or other platforms
Tech Stack and Infrastructure
- Development: Cursor ($20/month) - uses Sonnet as daily driver
- AI assistance: ChatGPT for questions and simple code changes
- Codex CLI for more complex tasks (included in subscription)
- Design: Figma ($25/month) for quick design iteration
- Analytics: Posthawk (~$10/month)
- Payments/Revenue: Superwall (20 cents per conversion)
- Mobile measurement: Singular (5 cents per conversion after 15K free)
- Backend/Hosting: AWS (~$2/month)
- In-app AI: Google Gemini Flash 2.5 (~$9/month)
- Total tech costs: Approximately $65/month
Lessons and Advice
- Do not design mock-ups - study best apps in your niche using tools like Screens Design and go straight into coding
- Create a Canva file with the best onboarding screens from competitors and apply them to your own app
- Use different AI tools for different purposes to diversify token expenditure and save money
- Do not try to oneshot an entire app - AI works better when you break it down into blocks and oneshot individual features or screens
- Authentication and databases often aren’t needed for modern apps - saving data on device reduces friction and costs
- When you find a format that works, put all your energy into it and spam that format
- You only need one platform (TikTok or Instagram Reels) and one format that works
- Longer onboarding (15 minutes vs 5) with value and storytelling can 3x conversion rates
- Don’t build your dream app first - improve an already successful app, add your personality, copy others’ distribution strategies
- Only pursue more ambitious projects after gaining experience with apps and distribution

Summary