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Education · head to head

Khan Academy vs Sky Guide

Khan Academy logo

Khan Academy

Education

Free world-class education for anyone, anywhere

From
Free
Rated
-
Full reviewWebsite
Sky Guide logo

Sky Guide

Education

iOS astronomy app that moved from a one-time purchase to a free-to-download, subscription-tiered model

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.; Sky Guide it is iOS-only, unlike SkySafari which also covers Android and desktop.
  • They diverge on capability: Khan Academy covers Video lessons, Sky Guide covers Light pollution forecasting.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Khan Academy and Sky Guide actually diverge.

Attributes where Khan Academy and Sky Guide differ
AttributeKhan AcademySky Guide
Pricing modelfreeFree download with Plus and Pro subscription upgrades
PlatformsWeb, IOS, AndroidiOS
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 Sky Guide

  • Light pollution forecasting
  • Meteor shower prediction
  • Camera and gyroscope sky view
  • Deep-sky object catalogue
  • Extreme zoom
  • Satellite tracking

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 Sky Guide
  • Assigning practice and tracking student progress in a classroomnot Sky Guide

Sky Guide

  • An iOS stargazer who wants light pollution forecasting to plan a dark-sky observing tripnot Khan Academy
  • Someone tracking meteor showers and wanting a forecast of viewing conditionsnot Khan Academy
  • A user who wants extreme zoom into deep-sky objects without owning a telescopenot Khan Academy
  • A buyer comparing subscription astronomy apps on iOS specifically, rather than cross-platform toolsnot 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.

Sky Guide

  • It is iOS-only, unlike SkySafari which also covers Android and desktop.
  • It has moved from one-time purchase to a subscription model, and long-time users who paid once for earlier versions have criticised the change publicly.
  • Pro tier pricing is high relative to Star Walk 2 for broadly similar core stargazing functionality.
  • It has no telescope control, unlike SkySafari Plus and Pro, which limits it to naked-eye and camera-based observing.
  • Its relationship to other apps under the same distribution platform is not clearly documented, which makes long-term support commitments harder to assess.

Pricing, plan by plan

Khan Academy

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

Sky Guide

Free
  • Sky GuideFree
    • Base sky map and object labelling
  • Sky Guide Plus$19.99/year
    • Larger star and satellite catalogue
    • Light pollution forecasting
    • Meteor shower prediction
  • Sky Guide Pro$39.99/year
    • Very large deep-sky object catalogue
    • Exoplanet data
    • Extreme zoom

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 Sky Guide if

  • You need light pollution forecasting.
  • You want to start without paying.
  • You work on iOS.
  • You also want meteor shower prediction.
Sky Guide review

Questions people ask

Is Khan Academy or Sky Guide better?
Neither clearly leads. Khan Academy starts at Free and Sky Guide at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Khan Academy or Sky Guide?
Khan Academy starts at Free and Sky Guide at Free.
Does Khan Academy or Sky Guide run on more platforms?
Khan Academy runs on Web, IOS, Android. Sky Guide runs on iOS.
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 Sky Guide is typically brought in for.
What can Khan Academy do that Sky Guide cannot?
Khan Academy covers Video lessons, Practice exercises, Mastery system, Progress tracking. Sky Guide covers Light pollution forecasting, Meteor shower prediction, Camera and gyroscope sky view, Deep-sky object catalogue.

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
Sky Guide: Is Sky Guide free?

The base app is free to download; Plus and Pro are subscription upgrades for a larger catalogue and forecasting features.

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
Sky Guide: Did Sky Guide used to be a one-time purchase?

Yes, earlier versions were sold as a one-time purchase before it moved to the current free-plus-subscription model.

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
Sky Guide: Does Sky Guide support telescope control?

No. For telescope control, SkySafari Plus or Pro is the better choice.

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