ChartDetector AI: an AI stock chart analysis app at $56K a month, coded with Cursor
A mobile app where traders photograph a stock or crypto chart and AI suggests where it may go, built by two brothers in Germany.
$56K per monthper month, founder, Starter Story interview published July 2026, as claimed
- Verification
- Screenshot Founder shared a dashboard screenshot (Stripe, RevenueCat, App Store). Not independently verified.
- App type
- Finance & money
- Currency
- US dollars (USD)
- Built with
- Cursor
- Got customers via
- Paid ads
- Prior audience
- Not stated in the source
- Source
- Timo Koehler (founder), Starter Story on YouTube, Jul 23, 2026
“We are currently at 56,000 per month... For all of the coding, we use Cursor AI... made a total profit of around eleven and a half thousand dollars.”
Editor's note: Growth comes almost entirely from paid TikTok ads (about 18,000 per month in spend); the founder says he works on the app about 20 hours per month.
How they got customers
TikTok Smart+ campaigns optimized on subscription events, broad targeting by country, at least six simple app-demo videos per campaign, a hard paywall with no free trial, and AppsFlyer for tracking.
Steps to try
Start with the smallest test of the idea; theirs began as a Telegram bot that read chart images with ChatGPT's new image upload.
From the sourceBuild the app with React Native, Expo and Supabase, using Cursor for all of the coding and RevenueCat for paywalls.
From the sourceSell the outcome in onboarding, add social proof, and use a hard paywall with no free trial so ads pay back right away.
From the sourceRun TikTok Smart+ campaigns optimized for subscriptions at about 50 per day, check ROAS weekly, raise budget no more than 20% every three days and keep feeding in new videos.
From the source
"From the source" steps summarize the linked post.
Source
We summarize and link. Figures are reproduced as stated and are unaudited unless marked Verified. Founder? Request a correction or removal.
Quick answers
How much does ChartDetector AI make?
ChartDetector AI reports $56K per month (per month, founder, Starter Story interview published July 2026, as claimed). Source: Timo Koehler (founder), Starter Story, Jul 23, 2026. Proof level: Screenshot. Founder shared a dashboard screenshot (Stripe, RevenueCat, App Store). Not independently verified.
What was ChartDetector AI built with?
The source says it was built with Cursor.
How did ChartDetector AI get customers?
Main growth channels: Paid ads. TikTok Smart+ campaigns optimized on subscription events, broad targeting by country, at least six simple app-demo videos per campaign, a hard paywall with no free trial, and AppsFlyer for tracking.