Socratic by Google

Socratic is a free app developed and acquired by Google that helps secondary students with homework. The tool works by image recognition: users photograph a written question, and Socratic uses OCR and AI to recognize it and suggest relevant resources (step-by-step explanations, selected YouTube videos, Google Scholar articles, textbooks). The app covers math (algebra, geometry, trigonometry, calculus), science (physics, chemistry, biology), history, English and other subjects. No locally-generated content: Socratic acts as an intelligent search engine surfing the public web to find explanation resources. Completely free, no registration or ads.

Socratic offers no French-language interface: it's an English-only Google product. No documented public API. The product was acquired in 2018, so less active than some newer Google products. The main strength is zero cost and resource variety (YouTube, books, academic articles). The main complaint: Socratic shows mostly external links rather than generating its own explanations, making it more useful as an intelligent search engine than as a personal interactive tutor.