André Ferretti

Clearer Thinking

July 2022–Present

Worked with Spencer Greenberg across ~20 projects — building decision-making tools and conducting research for Clearer Thinking's psychology newsletter with ~400,000 subscribers.

Ultimate Personality Test Built a personality test completed by 300k+ users that combines the 3 most popular frameworks in 1: MBTI, Big Five, Enneagram, plus a new one we created. It also gives AI-powered life advice.

Unique Traits Test Developed an assessment that measures 86 traits in a single test (like synesthesia, ADHD, autism and depression), using adaptive branching to ask only the most relevant questions for each person.

Does Astrology Work? Ran a scientific study in which 152 astrologers attempted to match anonymous people to their correct natal charts. Result: performance was indistinguishable from random guessing. Spencer's post on it got 6M views on X.

Personal Projects

Pact-Man A negotiation game where a GPT-powered VC agent negotiates five deal terms against a human founder, with an AI judge scoring each round.

Semantic Stock Search Finds large-cap stocks by semantic meaning rather than keywords (e.g., "parapapapaaa i'm lovin it" → McDonald's), using Gemini's Embedding API.

LinkSnip A URL shortener with click analytics, self-hosted on a VPS with Docker, Postgres, and a CI/CD pipeline using GitHub Actions and Vitest.

Hair Guard Uses your camera to spot when your hand sneaks toward your hair — and nudges you to stop. Runs locally, nothing leaves your device.

AI Council Sends the same prompt to several of the smartest LLMs at once (Claude, GPT, Gemini, and Grok) via OpenRouter, then displays the responses side by side.

Ricasa A home renovation cost estimator built with React and sold to a small business for $4k. Built in Italian for the local market.

Urgent Email A personal bot that checks my Gmail every hour, scores each email's urgency with Gemini, and pings me on Telegram if something needs attention.