Stefan Kalysta

Solo maker. Building TurtleTrade.

About

Software engineer for 15 years, active investor for 10. Building TurtleTrade solo: 163 published scoring rules, 13 background workers on Cloudflare, an iPhone app, and every formula and source on the page. If the data for a check is missing, the check is skipped and the instrument stays unrated — no estimating, no fake 0. Free, donation-funded, no ads, no crypto. From Germany, now Cyprus.

Badges

Gone streaking

Maker History

EXOSTOCKS — transparent stock screenerInstitutional-grade analysis. 163 rules. Fully transparent.
Aug 2026

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Joined Product HuntAugust 7th, 2026

Forums

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2mo ago

EXOSTOCKS — transparent stock screener - Institutional-grade analysis. 163 rules. Fully transparent.

EXOSTOCKS brings institutional-grade stock analysis to everyone. 8,562 stocks, ETFs, funds and indices are evaluated using 163 published rules across valuation, financial strength, cash flow, earnings quality, forensics, sentiment and management. Every score is traceable to its formula, source and date. Missing data stays missing—nothing is invented. No black-box ratings, buy tips, paywall or locked rules. Free on web and iPhone.