Education Progressive Web Apps

Spaced repetition flashcard app that works offline. Create decks with Markdown support, use the SuperMemo SM-2 algorithm for optimal memory retention. Data stored locally.

Open-source grammar and style checker for 20+ languages. The privacy-respecting Grammarly alternative with a browser extension and web app. Your text isn't used for AI training.

YouTube slow-downer for musicians. Paste a YouTube URL, loop any section, and adjust playback speed without pitch shift. Essential for learning songs by ear.

Advanced word finder and anagram solver. Find words by pattern, letters, length, and crossword constraints. Used by Scrabble players and crossword enthusiasts.

Convert text to International Phonetic Alphabet (IPA) transcription. Supports English, French, German, Spanish. Essential for language learners and linguistics students.

Free world-class education in Math, Science, and Humanities. Thousands of lessons, exercises, and videos. A genuine replacement for expensive tutoring, installable as a PWA.

Learn math, science, and CS through interactive problem-solving. Beautiful visualizations for concepts from probability to neural networks. A thinking-first learning platform.

Web companion for Anki — the world's most powerful spaced repetition flashcard system. Review your decks from any device. Decades of research-backed memory science, free forever.

Beautiful graphing calculator in the browser. Plot any function, adjust parameters with sliders, explore calculus visually. Used in classrooms worldwide, completely free.

Interactive mathematics for all levels — geometry, algebra, calculus, statistics. Create dynamic constructions, share interactive visualizations. Free for students and teachers forever.

Computational knowledge engine — solve equations, look up data, get step-by-step math solutions. The smartest calculator on the web with knowledge across every domain.

Interactive coding screencasts where you can pause and edit the instructor's code. Learn front-end development in a format you can't find anywhere else — truly hands-on learning.

Learn CSS Flexbox by helping frogs cross lily pads. 24 progressive levels, instant visual feedback. The most effective way to finally understand flexbox — offline, no account needed.

Free, open-source research tool for collecting, organizing, and citing sources. The academic's secret weapon — save papers from the web, organize by project, auto-generate citations.

Online LaTeX editor with real-time collaboration. Write academic papers, theses, and technical documents in LaTeX without installing anything. The standard for academic publishing.

The world's most popular language-learning app. Daily lessons in 40+ languages with gamified exercises. Installable as a PWA with full offline lesson access.