Mobile app
ChartDetector AI
AI app that analyzes a photo of a stock or crypto chart and suggests where it may go.
Visit ChartDetector AIRevenue (self-reported)
$56K/month
$260K+ total in 13 months; ~$18K/month spent on TikTok ads
How it started
Timo, 23, was a software engineer at a big German car brand who had tried several businesses with his brother. When ChatGPT added image uploads, they built a Telegram bot to analyze stock charts with AI, then turned it into a mobile app with a hard paywall. TikTok ads tracked via AppsFlyer drive growth (one ad generated $15K and ~5M views), letting Timo quit his job after six months and work only ~20 hours a month while traveling.
Tools they use
Expo
Frontend
Framework and cloud services to build React Native apps.
Pricing not listedVisit Expo- Featured
Supabase
Authentication
Postgres development platform with auth, storage and APIs.
Free tier · from $25/moFree tierVisit Supabase Cursor
AI
AI-first code editor.
FreeFree tierVisit CursorRevenueCat
Payments
In-app subscriptions and paywall infrastructure for mobile apps.
Pricing not listedVisit RevenueCat- Featured
OpenAI
AI
API access to GPT models.
Usage-basedVisit OpenAI
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Founders
- Timo Koehler · Co-founder
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