Skepsis teaches the Greek hiding in everyday English, in lessons short enough for a coffee break. It started as a way to teach a busy team in Texas, so every word comes with a Texas example. Made by Ion Petropoulos.
11 units, 57 word roots and 36 myths and ideas: tele, photo and graph; astronaut and petroleum; ethos, pathos and logos; hubris and nemesis; the Stoics; and a round of “Is it Greek?” (rodeo, maverick, barbecue).
The research behind these choices, with sources, is in RESEARCH.md.
Skepsis ships an MCP server, so Claude, Cursor or any MCP-capable agent can tutor you with the same lessons and spaced review:
claude mcp add skepsis -- npx -y github:ionpetro/skepsis
Code and content are MIT-licensed on GitHub. Corrections and new words are welcome.
Skepsis is free and always will be. The code is open under the MIT license: github.com/ionpetro/skepsis. No account, no sign-up, no ads. Your progress stays in your browser. The only thing we do is measure how it's used with PostHog (visits, lesson results, which words are hard, and session recordings with anything you type hidden), so we can make it better.
Skepsis is one of 8 free, open-source learning apps, each one a short daily game:
If one helps you, a star on GitHub helps other people find it.