# Metheus — Immersion Language Learning Platform > Metheus helps you learn languages through real content immersion. Read books, watch videos, and mine subtitles — all connected to an adaptive SRS flashcard system. Built for self-learners who want context-driven vocabulary acquisition. ## Quick facts - Founded by Isaac (solo founder, bootstrapped) - Stack: Next.js 14 (App Router), Firebase Auth, Backblaze B2, Cloudflare CDN, IndexedDB - Available as web app + browser extension (Chrome, Firefox, Edge) - Free core experience with premium upgrade (freemium) ## Key pages - [Home](https://metheus.app/): Landing page with product overview - [Metheus App](https://metheus.app/metheus-app): Feature details and FAQ - [What is Metheus](https://metheus.app/metheus): Platform explanation and philosophy - [Blog](https://metheus.app/blog): Guides and reviews on immersion learning (EN) - [Blog ES](https://metheus.app/es/blog): Guías y reviews sobre aprendizaje por inmersión (ES) - [Frases](https://metheus.app/frases): EN→ES phrase lookup engine with real video examples - [Browser Extension](https://metheus.app/extension): Extension features, compatibility, and setup - [About](https://metheus.app/about): Founder story and background - [Terms](https://metheus.app/terms): Terms of Service - [Privacy](https://metheus.app/privacy): Privacy Policy ## Learning resources - [Guides](https://metheus.app/blog/guides): Tutorials on immersion workflows, SRS optimization, and tooling - [Reviews](https://metheus.app/blog/reviews): Tool and resource comparisons for language learners - [Guías](https://metheus.app/es/blog/guias): Tutoriales sobre inmersión y SRS (ES) - [Reviews ES](https://metheus.app/es/blog/reviews): Comparativas de herramientas (ES) ## Contact - GitHub: https://github.com/GisaacPr - Extension (Chrome): https://chromewebstore.google.com/detail/metheus/djfaoknkbmmcneicpcdogjhfefbclaoe - Extension (Firefox): https://addons.mozilla.org/en-US/firefox/addon/metheus-app/ - Extension (Edge): https://microsoftedge.microsoft.com/addons/detail/metheus-extension-langua/khghbiiioebiljnnmfmlaeppffoffhpa