The Compatibility Code

An astrology and relationship app running a suite of interactive tests and a daily AI horoscope, made verifiably safe.

An astrology and relationship brand running a suite of interactive tests and a daily AI horoscope. Vanilla JavaScript front-ends on Google Apps Script back-ends (sessions, email, rate limiting), Google Sheets storage, a PHP API proxy, and the Claude API with per-sign and per-day caching. Live: Test 1 (Four-Elements compatibility, 62 questions, 16 result pages, free), Test 2 (Numerology Portrait, free), and the Daily AI Horoscope (free, capped at roughly 12 API calls a day to control cost). Audited in April, verified complete June 10.

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