Duolingo

In plain words

Duolingo is a language learning platform available as a web app and iOS application. It offers lessons in multiple languages at no cost to users. The service is designed for anyone interested in learning new languages through an accessible digital format. Launched in 2013, Duolingo makes language education available to a broad audience without financial barriers.

written from the facts on this page · September 2026

From the sources

Duolingo is the world

• 
  Duolingo for Schools2015 · schools.duolingo.com · ▲89

  Free language learning platform for schools

• 
  Tinycards by Duolingo2016 · duolingo.com · ▲551

  The future of learning with flashcards, by Duolingo

• 
  Tiny Cards by Duolingo - Web2017 · ▲365

  Learn languages with this flash card app, now on the web

• BA
  Building an open-source language-learning platform2020 · librelingo.app · ▲159
• 
  Duolingo Learning app2020 · duolingo.com · ▲7

  Any ages

• 
  Flowlingo2018 · getflowlingo.com · ▲283

  Get fluent in a language through content immersion

• 
  SimCity, but with Permits▲855

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 20h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Slack▲2,714

  Be less busy. Real-time messaging, archiving & search.

  Work · 2013 · slack.com

• 
  Trello▲1,003

  Powering millions of teams to work smarter, together

  Work · 2013 · trello.com

• IM
  I mapped US medical prices. Save thousands by driving a few miles▲488

  Life & fun · 2013 · bestmedicareprice.com

• 
  Intercom▲464

  Communicate personally with every single customer.

  Life & fun · 2013 · intercom.com

• 
  Canva▲435

  AI that creates with you, and connects to your world

  Growth · 2013 · canva.com

• IM
  I made an HN for the financial industry▲422

  Life & fun · 2013 · boredbanker.com