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Education · head to head

Merlin Bird ID vs Seek by iNaturalist

Merlin Bird ID logo

Merlin Bird ID

Education

Free bird identification app from Cornell Lab of Ornithology using photo, sound and step-by-step ID

From
Free
Rated
-
Full reviewWebsite
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

The short version

  • Each has a real cost: Merlin Bird ID it only identifies birds, so it is not useful for plants, insects or other wildlife the way a general nature app is.; 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.
  • They diverge on capability: Merlin Bird ID covers Sound ID, Seek by iNaturalist covers Offline identification.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Merlin Bird ID and Seek by iNaturalist actually diverge.

Attributes where Merlin Bird ID and Seek by iNaturalist differ
AttributeMerlin Bird IDSeek by iNaturalist

Identical on both: starting price (Free), pricing model (Free, no ads and no in-app purchases), free tier (Yes), platforms (iOS, Android), 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 Merlin Bird ID

  • Sound ID
  • Photo ID
  • Step-by-step ID
  • Offline regional packs
  • eBird-linked suggestions
  • No account required for basic use

Only in Seek by iNaturalist

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

What people use each for

The jobs each tool is most often brought in to do.

Merlin Bird ID

  • A casual walker who hears a bird and wants to know what it is without paying for an appnot Seek by iNaturalist
  • A birdwatcher building a life list who wants identification tied to real regional sighting datanot Seek by iNaturalist
  • Someone teaching a child to identify birds without exposing them to ads or a paywallnot Seek by iNaturalist
  • A hiker who wants offline bird identification in an area with no signalnot Seek by iNaturalist

Seek by iNaturalist

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

Where each one falls short

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

Merlin Bird ID

  • It only identifies birds, so it is not useful for plants, insects or other wildlife the way a general nature app is.
  • Sound ID can struggle in noisy environments or with overlapping bird calls, since it depends on a clean audio signal.
  • Being a free institutional project, feature releases and interface polish move more slowly than a funded commercial app.
  • Photo ID accuracy drops for juvenile birds, moulting birds or poor-quality photos, more so than for well-lit adult specimens.
  • It has no social or gamified layer, so users who want streaks, badges or a community feed will find it plain by comparison.

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.

Pricing, plan by plan

Merlin Bird ID

Free
  • Merlin Bird IDFree
    • All identification modes included
    • Offline regional bird packs
    • No account required for identification

Seek by iNaturalist

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

Which should you pick?

Choose Merlin Bird ID if

  • You need sound id.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want photo id.
Merlin Bird ID review

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

Questions people ask

Is Merlin Bird ID or Seek by iNaturalist better?
Neither clearly leads. Merlin Bird ID starts at Free and Seek by iNaturalist at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Merlin Bird ID or Seek by iNaturalist?
Merlin Bird ID starts at Free and Seek by iNaturalist at Free.
Does Merlin Bird ID or Seek by iNaturalist run on more platforms?
Both run on iOS, Android, so platform support will not decide this one for you.
Can I use Merlin Bird ID for free?
Both have a free tier, so you can try either at no cost before committing.
What is Merlin Bird ID best used for?
Merlin Bird ID is most often used for a casual walker who hears a bird and wants to know what it is without paying for an app, a birdwatcher building a life list who wants identification tied to real regional sighting data, someone teaching a child to identify birds without exposing them to ads or a paywall, a hiker who wants offline bird identification in an area with no signal. Of those, a casual walker who hears a bird and wants to know what it is without paying for an app and a birdwatcher building a life list who wants identification tied to real regional sighting data are not what Seek by iNaturalist is typically brought in for.
What can Merlin Bird ID do that Seek by iNaturalist cannot?
Merlin Bird ID covers Sound ID, Photo ID, Step-by-step ID, Offline regional packs. Seek by iNaturalist covers Offline identification, No account required, Child-safe design, Species badges.

Answered from the vendors’ own pages

Merlin Bird ID: Is Merlin Bird ID really free with no catch?

Yes. It has no ads, no in-app purchases and no subscription; it is funded by the Cornell Lab of Ornithology as a research and outreach tool.

Seek by iNaturalist: Is Seek really free?

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

Merlin Bird ID: How is it different from eBird?

Merlin identifies birds; eBird is where you log checklists and sightings that feed the research database Merlin draws its suggestions from.

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.

Merlin Bird ID: Does it work offline?

Yes, once you download the regional bird pack for your area.

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.

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