Education · head to head
Pl@ntNet vs Sky Guide
Pl@ntNet
Education
Free plant identification app run by a consortium of French public research institutes
- 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: Pl@ntNet it offers no plant care guidance, watering reminders or disease diagnosis, unlike commercial apps built around ongoing plant care.; Sky Guide it is iOS-only, unlike SkySafari which also covers Android and desktop.
- They diverge on capability: Pl@ntNet covers Photo identification, 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 Pl@ntNet 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 Pl@ntNet
- Photo identification
- Large species coverage
- Multi-language support
- Community-sourced database
- Regional flora filtering
- Contribution to research
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.
Pl@ntNet
- A gardener or hiker who wants free plant identification without a subscriptionnot Sky Guide
- A student or researcher wanting a citation-friendly, institutionally-run identification toolnot Sky Guide
- Someone identifying plants outside English-speaking regions who needs one of its 50-plus languagesnot Sky Guide
- A forager wanting a second opinion on a plant before relying solely on one sourcenot Sky Guide
Sky Guide
- An iOS stargazer who wants light pollution forecasting to plan a dark-sky observing tripnot Pl@ntNet
- Someone tracking meteor showers and wanting a forecast of viewing conditionsnot Pl@ntNet
- A user who wants extreme zoom into deep-sky objects without owning a telescopenot Pl@ntNet
- A buyer comparing subscription astronomy apps on iOS specifically, rather than cross-platform toolsnot Pl@ntNet
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Pl@ntNet
- It offers no plant care guidance, watering reminders or disease diagnosis, unlike commercial apps built around ongoing plant care.
- Identification accuracy varies by region depending on how well local flora is represented in the community-submitted training data.
- The interface is more utilitarian than a commercial app, reflecting its research origins rather than consumer product design.
- It should never be relied on alone to determine whether a wild plant or fungus is safe to eat, and the project itself does not claim otherwise.
- Because it is run by a nonprofit research consortium rather than a company, feature development and interface updates move more slowly than a funded commercial competitor.
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
Pl@ntNet
Free- Pl@ntNetFree
- Full identification for over 80,000 species
- Available in over 50 languages
- No account required for basic identification
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 Pl@ntNet if
- You need photo identification.
- You want to start without paying.
- You work on iOS, Android, Web.
- You also want large species coverage.
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 Pl@ntNet or Sky Guide better?
- Neither clearly leads. Pl@ntNet 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, Pl@ntNet or Sky Guide?
- Pl@ntNet starts at Free and Sky Guide at Free.
- Does Pl@ntNet or Sky Guide run on more platforms?
- Pl@ntNet runs on iOS, Android, Web. Sky Guide runs on iOS.
- Can I use Pl@ntNet for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Pl@ntNet best used for?
- Pl@ntNet is most often used for a gardener or hiker who wants free plant identification without a subscription, a student or researcher wanting a citation-friendly, institutionally-run identification tool, someone identifying plants outside english-speaking regions who needs one of its 50-plus languages, a forager wanting a second opinion on a plant before relying solely on one source. Of those, a gardener or hiker who wants free plant identification without a subscription and a student or researcher wanting a citation-friendly, institutionally-run identification tool are not what Sky Guide is typically brought in for.
- What can Pl@ntNet do that Sky Guide cannot?
- Pl@ntNet covers Photo identification, Large species coverage, Multi-language support, Community-sourced database. Sky Guide covers Light pollution forecasting, Meteor shower prediction, Camera and gyroscope sky view, Deep-sky object catalogue.
Answered from the vendors’ own pages
Pl@ntNet: Is Pl@ntNet free?
Yes, entirely free with no ads or in-app purchases, run by a consortium of French public research institutes.
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.
Pl@ntNet: How accurate is it?
Accuracy varies by region and species depending on how much community-submitted photo data exists for that flora, but it is generally strong for well-represented regions.
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.
Pl@ntNet: Can I use it to check if a plant is safe to eat?
No. It is an identification aid, not a safety tool, and should not be relied on alone for foraging decisions.
Sky Guide: Does Sky Guide support telescope control?
No. For telescope control, SkySafari Plus or Pro is the better choice.
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