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Education · head to head

Khan Academy vs Stellarium

Khan Academy logo

Khan Academy

Education

Free world-class education for anyone, anywhere

From
Free
Rated
-
Full reviewWebsite
Stellarium logo

Stellarium

Education

Free open source desktop planetarium software, distinct from the paid Stellarium Mobile Plus app

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Khan Academy the Internet Archive's capture of Khan Academy's homepage on 1 January 2021 stated it is a 501(c)(3) nonprofit and that its full library of practice and lessons 'is all free for learners and teachers', funded by donations rather than subscriptions.; Stellarium it is desktop-only software, so it has no native touch-optimised phone interface; the similarly named mobile app is a different paid product from a different company.
  • They diverge on capability: Khan Academy covers Video lessons, Stellarium covers Photorealistic sky rendering.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Khan Academy and Stellarium actually diverge.

Attributes where Khan Academy and Stellarium differ
AttributeKhan AcademyStellarium
Pricing modelfreeOpen source, no licence fee
PlatformsWeb, IOS, AndroidWindows, macOS, Linux
Founded2008Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Education).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Khan Academy

  • Video lessons
  • Practice exercises
  • Mastery system
  • Progress tracking
  • Personalized learning
  • Teacher tools
  • Parent dashboard
  • Test prep

Only in Stellarium

  • Photorealistic sky rendering
  • Large object catalogue
  • Telescope control
  • Scripting engine
  • Free and open source
  • Plugin ecosystem

What people use each for

The jobs each tool is most often brought in to do.

Khan Academy

  • Free self paced learning across maths, science and humanitiesnot Stellarium
  • Assigning practice and tracking student progress in a classroomnot Stellarium

Stellarium

  • A student or educator wanting a serious, scriptable planetarium tool without a budget line itemnot Khan Academy
  • An amateur astronomer wanting telescope control from desktop software they can inspect and modifynot Khan Academy
  • Someone running a planetarium display or public astronomy event on a scripted shownot Khan Academy
  • A hobbyist who wants a large object catalogue without paying a subscription, and does not need a phone appnot Khan Academy

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Khan Academy

  • The Internet Archive's capture of Khan Academy's homepage on 1 January 2021 stated it is a 501(c)(3) nonprofit and that its full library of practice and lessons 'is all free for learners and teachers', funded by donations rather than subscriptions.

Stellarium

  • It is desktop-only software, so it has no native touch-optimised phone interface; the similarly named mobile app is a different paid product from a different company.
  • As a volunteer-maintained open source project, support is community-based rather than a guaranteed commercial help desk.
  • The interface, while capable, is less immediately intuitive for a first-time user than a polished commercial phone app.
  • Telescope control and some advanced plugins require additional setup that a non-technical user may find fiddly.
  • Because it shares a name with the unrelated paid Stellarium Mobile Plus app, buyers researching pricing online can easily conflate the two products.

Pricing, plan by plan

Khan Academy

Free
  • FreeFree
    • Video lessons
    • Practice exercises
    • Progress tracking

Stellarium

Free
  • Stellarium DesktopFree
    • Full software, GPL licensed
    • No account, ads or subscription
    • Community-developed plugins

Which should you pick?

Choose Khan Academy if

  • You need video lessons.
  • You want to start without paying.
  • You work on Web, IOS, Android.
  • You also want practice exercises.
Khan Academy review

Choose Stellarium if

  • You need photorealistic sky rendering.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want large object catalogue.
Stellarium review

Questions people ask

Is Khan Academy or Stellarium better?
Neither clearly leads. Khan Academy starts at Free and Stellarium at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Khan Academy or Stellarium?
Khan Academy starts at Free and Stellarium at Free.
Does Khan Academy or Stellarium run on more platforms?
Khan Academy runs on Web, IOS, Android. Stellarium runs on Windows, macOS, Linux.
Can I use Khan Academy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Khan Academy best used for?
Khan Academy is most often used for free self paced learning across maths, science and humanities, assigning practice and tracking student progress in a classroom. Of those, free self paced learning across maths, science and humanities and assigning practice and tracking student progress in a classroom are not what Stellarium is typically brought in for.
What can Khan Academy do that Stellarium cannot?
Khan Academy covers Video lessons, Practice exercises, Mastery system, Progress tracking. Stellarium covers Photorealistic sky rendering, Large object catalogue, Telescope control, Scripting engine.

Answered from the vendors’ own pages

Khan Academy: Is Khan Academy free?

Yes. Khan Academy is a 501(c)(3) nonprofit and states that it is a free tool for students, teachers and parents alike, with over 840 free courses and teacher tools provided at no cost. It relies on donor support rather than fees.

Source
Stellarium: Is Stellarium really free?

The desktop software is free and open source under the GPL licence. The separate mobile app, Stellarium Mobile Plus, is a different paid product.

Khan Academy: Who is Khan Academy for?

Khan Academy serves students, teachers and parents, covering core academic subjects from K-12 through early college. The platform is available in more than 190 countries and over 55 languages.

Source
Stellarium: Is the mobile app made by the same team?

No. Stellarium Mobile Plus is built by Noctua Software, a different company, and is sold on subscription.

Khan Academy: How is Khan Academy funded if it is free?

As a 501(c)(3) nonprofit, Khan Academy is funded by donations rather than subscriptions. Its about page states that donor support is what keeps the classroom tools free.

Source
Stellarium: What platforms does the free version run on?

Windows, macOS and Linux desktop.

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