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Education · head to head

Seek by iNaturalist vs Stellarium

Seek by iNaturalist logo

Seek by iNaturalist

Education

Free nonprofit wildlife and plant identification app built to be safe for children

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: Seek by iNaturalist identification quality depends on how well iNaturalist community data covers a given region, so obscure or under-photographed species can be misidentified.; 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: Seek by iNaturalist covers Offline identification, Stellarium covers Photorealistic sky rendering.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Seek by iNaturalist and Stellarium actually diverge.

Attributes where Seek by iNaturalist and Stellarium differ
AttributeSeek by iNaturalistStellarium
Pricing modelFree, no ads and no in-app purchasesOpen source, no licence fee
PlatformsiOS, AndroidWindows, macOS, Linux

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 Seek by iNaturalist

  • Offline identification
  • No account required
  • Child-safe design
  • Species badges
  • Broad coverage
  • Community-trained model

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.

Seek by iNaturalist

  • A parent wanting a nature app for a child without accounts, chat or data collection concernsnot Stellarium
  • A hiker in an area with no signal who needs offline plant or insect identificationnot Stellarium
  • A teacher running an outdoor nature scavenger hunt with a classnot Stellarium
  • Anyone who wants broad wildlife identification without paying a subscriptionnot Stellarium

Stellarium

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

Where each one falls short

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

Seek by iNaturalist

  • Identification quality depends on how well iNaturalist community data covers a given region, so obscure or under-photographed species can be misidentified.
  • It lacks the deep plant care guidance that commercial apps like PictureThis provide, since it is an identification tool, not a gardening assistant.
  • Observations made in Seek are not automatically added to the iNaturalist research database unless separately uploaded, which surprises some users expecting automatic contribution.
  • The offline model download is a meaningful app size, which matters on devices with limited storage.
  • Because there are no accounts, there is no cross-device sync of identification history.

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

Seek by iNaturalist

Free
  • SeekFree
    • Full identification for plants, insects and animals
    • Offline identification once models are downloaded
    • No account required

Stellarium

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

Which should you pick?

Choose Seek by iNaturalist if

  • You need offline identification.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want no account required.
Seek by iNaturalist 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 Seek by iNaturalist or Stellarium better?
Neither clearly leads. Seek by iNaturalist 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, Seek by iNaturalist or Stellarium?
Seek by iNaturalist starts at Free and Stellarium at Free.
Does Seek by iNaturalist or Stellarium run on more platforms?
Seek by iNaturalist runs on iOS, Android. Stellarium runs on Windows, macOS, Linux.
Can I use Seek by iNaturalist for free?
Both have a free tier, so you can try either at no cost before committing.
What is Seek by iNaturalist best used for?
Seek by iNaturalist is most often used for a parent wanting a nature app for a child without accounts, chat or data collection concerns, a hiker in an area with no signal who needs offline plant or insect identification, a teacher running an outdoor nature scavenger hunt with a class, anyone who wants broad wildlife identification without paying a subscription. Of those, a parent wanting a nature app for a child without accounts, chat or data collection concerns and a hiker in an area with no signal who needs offline plant or insect identification are not what Stellarium is typically brought in for.
What can Seek by iNaturalist do that Stellarium cannot?
Seek by iNaturalist covers Offline identification, No account required, Child-safe design, Species badges. Stellarium covers Photorealistic sky rendering, Large object catalogue, Telescope control, Scripting engine.

Answered from the vendors’ own pages

Seek by iNaturalist: Is Seek really free?

Yes, entirely, with no ads or in-app purchases, run by the nonprofit iNaturalist.

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.

Seek by iNaturalist: Do I need an account?

No, Seek works fully without an account, which is a deliberate choice to make it safe for children.

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.

Seek by iNaturalist: Does Seek feed the iNaturalist research database?

Not automatically. You have to choose to upload an observation to iNaturalist.org for it to become part of the research record.

Stellarium: What platforms does the free version run on?

Windows, macOS and Linux desktop.

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