Duolingo
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. Lessons download ahead of time, so a commute without signal still counts toward the streak.

Duolingo, as it opens in a browser tab.
Not sure how to add Duolingo to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.
Own Duolingo? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.
How to install Duolingo as a PWA
Screenshots
Are you the maker of Duolingo? Claim this listing →
Similar to Duolingo
The web's default translator covering 240+ languages — type, speak or upload documents and whole websites. translate.google.com ships a standalone PWA manifest, so the install icon in Chrome's address bar turns it into a dedicated translation window; note that offline language packs remain a mobile-app exclusive.

HanziGraph is a Chinese learning tool that maps relationships between hanzi characters, letting learners explore how characters connect and combine. Each character is shown alongside examples that illustrate its real use. It is designed for students of Chinese who want to build vocabulary through character connections rather than rote lists.
Lorenzi's Jisho is a web frontend for the JMdict Japanese-English dictionary project, comparable to Jisho.org. Learners can look up Japanese words and their English meanings, then save vocabulary into custom study lists for review, making it useful for students of Japanese at any level.
Calculate in a notebook and share — from everyday math to engineering. Use variables, functions, and units and see results immediately. Add comments, copy calculations to apps like Word or Excel, or share them through an editable link. Calculate thermodynamic fluid properties with the integrated CoolProp library.

AILearnHub is an AI learning tool that transforms any topic, question, or idea into structured, study-ready lessons. It helps students, professionals, and self-learners quickly generate organized content for effective learning, review, or teaching.

AIQ provides free, gamified AI literacy education for kids and teens aged 5–18. It adapts content across four age-tiered modes, focusing on learning AI and fostering human thinking. The platform is accessible to users in the Philippines.
Own a PWA? See the listing options — standard submission is free.