Education · head to head
Busuu vs Sky Guide
Busuu
Education
Language learning app with a community correction feature, owned by Chegg since 2022
- From
- Free
- Rated
- -
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: Busuu the free tier is limited enough that meaningful progress in most languages effectively requires the Premium subscription within a few weeks of use.; Sky Guide it is iOS-only, unlike SkySafari which also covers Android and desktop.
- They diverge on capability: Busuu covers Structured course units, 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 Busuu and Sky Guide 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 Busuu
- Structured course units
- Community correction
- Study plans and certification
- Offline lessons
- Grammar review units
- Live tutoring credits
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.
Busuu
- A self-directed adult learner who wants human correction on writing and speaking exercises rather than only algorithmic feedbacknot Sky Guide
- Someone working toward a specific proficiency level and wanting a structured study plan rather than a gamified drip of lessonsnot Sky Guide
- A learner who wants offline access for commuting or travel, which requires the Premium subscriptionnot Sky Guide
- A buyer comparing Busuu against Duolingo who values depth of grammar explanation over gamificationnot Sky Guide
Sky Guide
- An iOS stargazer who wants light pollution forecasting to plan a dark-sky observing tripnot Busuu
- Someone tracking meteor showers and wanting a forecast of viewing conditionsnot Busuu
- A user who wants extreme zoom into deep-sky objects without owning a telescopenot Busuu
- A buyer comparing subscription astronomy apps on iOS specifically, rather than cross-platform toolsnot Busuu
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Busuu
- The free tier is limited enough that meaningful progress in most languages effectively requires the Premium subscription within a few weeks of use.
- Community correction quality depends on other users being active in your target language at the time you submit, so response speed and quality vary noticeably by language and time zone.
- Since the 2022 Chegg acquisition, Busuu sits inside a company built around subscription homework and study services, and Chegg has faced its own commercial pressure from AI tools reducing demand for its core products, which is a relevant roadmap risk.
- Course depth and language coverage are uneven; widely spoken languages such as Spanish and French have far more content than smaller language courses.
- The official Busuu certificate is not a recognised external qualification equivalent to something like an IELTS or DELF exam, so it carries limited weight outside informal 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.
Pricing, plan by plan
Busuu
Free- Busuu Premium$13.99/month
- Free tier gives limited vocabulary and grammar content per language, with ads
- Premium unlocks full course content, offline lessons and grammar review units
- Annual Premium plans typically run $69.99 to $99.99, cheaper per month than monthly billing
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 Busuu if
- You need structured course units.
- You want to start without paying.
- You work on iOS, Android, Web.
- You also want community correction.
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.
Questions people ask
- Is Busuu or Sky Guide better?
- Neither clearly leads. Busuu 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, Busuu or Sky Guide?
- Busuu starts at Free and Sky Guide at Free.
- Does Busuu or Sky Guide run on more platforms?
- Busuu runs on iOS, Android, Web. Sky Guide runs on iOS.
- Can I use Busuu for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Busuu best used for?
- Busuu is most often used for a self-directed adult learner who wants human correction on writing and speaking exercises rather than only algorithmic feedback, someone working toward a specific proficiency level and wanting a structured study plan rather than a gamified drip of lessons, a learner who wants offline access for commuting or travel, which requires the premium subscription, a buyer comparing busuu against duolingo who values depth of grammar explanation over gamification. Of those, a self-directed adult learner who wants human correction on writing and speaking exercises rather than only algorithmic feedback and someone working toward a specific proficiency level and wanting a structured study plan rather than a gamified drip of lessons are not what Sky Guide is typically brought in for.
- What can Busuu do that Sky Guide cannot?
- Busuu covers Structured course units, Community correction, Study plans and certification, Offline lessons. Sky Guide covers Light pollution forecasting, Meteor shower prediction, Camera and gyroscope sky view, Deep-sky object catalogue.
Answered from the vendors’ own pages
Busuu: Is Busuu free?
A limited amount of vocabulary and grammar content per language is free with ads. Full course access, offline lessons and the certificate require Busuu Premium.
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.
Busuu: Who owns Busuu?
Chegg, the publicly traded US education technology company, acquired Busuu in 2022.
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.
Busuu: What is the community correction feature?
Writing and speaking exercises are submitted to other Busuu users who are native speakers of your target language, who correct them for free as part of the community exchange.
Sky Guide: Does Sky Guide support telescope control?
No. For telescope control, SkySafari Plus or Pro is the better choice.
Related pages
Other head to heads
- Busuu vs Memrise
- Busuu vs Babbel
- Busuu vs Duolingo
- Busuu vs Elevate
- Busuu vs Lumosity
- Busuu vs Photomath
- Busuu vs Anki
- Busuu vs Rosetta Stone
- Busuu vs Blackboard
- Busuu vs PictureThis
- Busuu vs Miro Education
- Busuu vs Replit AI Agent
- Busuu vs Aeries Student Information System
- Busuu vs Articulate 360
- Busuu vs Brilliant
- Busuu vs CampMinder
- Busuu vs Clever
- Busuu vs Flip
- Busuu vs SkySafari
- Busuu vs Star Walk 2
- Busuu vs Stellarium
- Busuu vs Simply Piano
- Busuu vs Yousician
- Busuu vs Merlin Bird ID
- Busuu vs Flowkey
- Busuu vs ClassLink
- Busuu vs Gaggle
- Busuu vs Gimkit
- Busuu vs Jackrabbit Class
- Busuu vs eBird
- Sky Guide vs Memrise
- Sky Guide vs Babbel
- Sky Guide vs Duolingo
- Sky Guide vs Elevate
- Sky Guide vs Lumosity
- Sky Guide vs Photomath
- Sky Guide vs Anki
- Sky Guide vs Rosetta Stone
- Sky Guide vs Blackboard
- Sky Guide vs PictureThis
- Sky Guide vs Miro Education
- Sky Guide vs Replit AI Agent
- Sky Guide vs Aeries Student Information System
- Sky Guide vs Articulate 360
- Sky Guide vs Brilliant
- Sky Guide vs CampMinder
- Sky Guide vs Clever
- Sky Guide vs Flip
- Sky Guide vs SkySafari
- Sky Guide vs Star Walk 2
- Sky Guide vs Stellarium
- Sky Guide vs Simply Piano
- Sky Guide vs Yousician
- Sky Guide vs Merlin Bird ID
- Sky Guide vs Flowkey
- Sky Guide vs ClassLink
- Sky Guide vs Gaggle
- Sky Guide vs Gimkit
- Sky Guide vs Jackrabbit Class
- Sky Guide vs eBird