Expii – Zoomable interactive map of topics in math and science

In plain words

Expii is a free learning website offering thousands of interactive lessons covering math and science topics. It provides multiple ways to learn each subject through interactive explanations and videos, allowing users to explore concepts at their own pace. The platform is designed for students seeking personalized learning experiences across a wide range of mathematical and scientific subjects.

written from the facts on this page · September 2026

• 
  Calcul.io2024 · calcul.io · ▲127

  Math playground - smart online calculator

• 
  Expii Solve2016 · expii.com · ▲72

  Nat'l Math Olymp coach shares fun side of math for everyone!

• 
  Mathpix2016 · mathpix.com · ▲12

  OCR for solving hand-written math equations

• 
  Entusia | Math Exercises2024 · play.google.com · ▲8

  Interactive Math Exercises For Everyone

• 
  Mathify2024 · ▲11

  Learning Made Easy

• 
  MathX - Scientific Graphing Calculator2017 · apps.apple.com · ▲5

  Graphic and scientific calculator on your iPhone and iPad

• 
  SimCity, but with Permits▲930

  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 · 3d ago · permit.petercai.com

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

  Life & fun · 15d 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 · 16d 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 · 10d 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 · 14d ago · carrierexplode.com

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

  Life & fun · 24d ago · space.bl2.net

• 
  Bubble▲1,409

  Build a fully functional web app without any code

  Dev tools · 2015 · bubble.io

• 
  Medium 2.0▲1,131

  A new look, app, and features to move thinking forward

  Work · 2015 · medium.com

• 
  Twitch Installs Arch Linux – A cooperative text-based horror game▲802

  Life & fun · 2015 · twitchinstalls.com

• 
  Facebook Design Resources▲793

  A collection of free resources made by designers at Facebook

  Work · 2015 · meta.com

• 
  Super Top Secret Product Hunt β▲664

  Preview and help build the future of Product Hunt 🙊

  Life & fun · 2015 · rrhoover.typeform.com

• 
  Webflow CMS▲642

  Build professional dynamic websites without any code

  Dev tools · 2015