Education · head to head
Sky Guide vs Udemy
Sky Guide
Education
iOS astronomy app that moved from a one-time purchase to a free-to-download, subscription-tiered model
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Sky Guide it is iOS-only, unlike SkySafari which also covers Android and desktop.; Udemy course quality varies significantly as Udemy allows anyone to create and sell courses without vetting
- They diverge on capability: Sky Guide covers Light pollution forecasting, Udemy covers Video courses.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Sky Guide and Udemy actually diverge.
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 Sky Guide
- Light pollution forecasting
- Meteor shower prediction
- Camera and gyroscope sky view
- Deep-sky object catalogue
- Extreme zoom
- Satellite tracking
Only in Udemy
- Video courses
- Quizzes
- Assignments
- Certificates
- Mobile learning
- Offline viewing
- Q&A
- Reviews
What people use each for
The jobs each tool is most often brought in to do.
Sky Guide
- An iOS stargazer who wants light pollution forecasting to plan a dark-sky observing tripnot Udemy
- Someone tracking meteor showers and wanting a forecast of viewing conditionsnot Udemy
- A user who wants extreme zoom into deep-sky objects without owning a telescopenot Udemy
- A buyer comparing subscription astronomy apps on iOS specifically, rather than cross-platform toolsnot Udemy
Udemy
- Skill buildingnot Sky Guide
- Career transitionnot Sky Guide
- Professional developmentnot Sky Guide
- Team trainingnot Sky Guide
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
Udemy
- Course quality varies significantly as Udemy allows anyone to create and sell courses without vetting
- No formal credentials or degrees offered, unlike Coursera and edX which offer institution-branded certificates
- Courses are self-paced with no instructor interaction or support, making structured learning difficult for some students
Pricing, plan by plan
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
Udemy
Free- Personal$19/month
- 11,000+ courses access
- Team$360/year
- For 5-20 people
Which should you pick?
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.
Choose Udemy if
- You need video courses.
- You want to start without paying.
- You work on Web, iOS, Android.
- You also want quizzes.
Questions people ask
- Is Sky Guide or Udemy better?
- Neither clearly leads. Sky Guide starts at Free and Udemy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Sky Guide or Udemy?
- Sky Guide starts at Free and Udemy at Free.
- Does Sky Guide or Udemy run on more platforms?
- Sky Guide runs on iOS. Udemy runs on Web, iOS, Android.
- Can I use Sky Guide for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Sky Guide best used for?
- Sky Guide is most often used for an ios stargazer who wants light pollution forecasting to plan a dark-sky observing trip, someone tracking meteor showers and wanting a forecast of viewing conditions, a user who wants extreme zoom into deep-sky objects without owning a telescope, a buyer comparing subscription astronomy apps on ios specifically, rather than cross-platform tools. Of those, an ios stargazer who wants light pollution forecasting to plan a dark-sky observing trip and someone tracking meteor showers and wanting a forecast of viewing conditions are not what Udemy is typically brought in for.
- What can Sky Guide do that Udemy cannot?
- Sky Guide covers Light pollution forecasting, Meteor shower prediction, Camera and gyroscope sky view, Deep-sky object catalogue. Udemy covers Video courses, Quizzes, Assignments, Certificates.
Answered from the vendors’ own pages
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.
Udemy: Does Udemy offer team/business pricing?
Yes, Udemy's Team plan costs $360 per user annually for groups of 5 to 20 people, in addition to individual Personal plan at $19/month.
SourceSky 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.
Sky Guide: Does Sky Guide support telescope control?
No. For telescope control, SkySafari Plus or Pro is the better choice.
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