**Merlin Bird ID vs Picture Bird — Free Cornell Lab vs Subscription**

> Merlin is free from the Cornell Lab with no in-app purchases. Picture Bird is a subscription. A direct comparison of what the money buys, with App Store prices.

Source: https://orvik.app/compare/merlin-vs-picture-bird/ · updated: 2026-09-04

1. [Orvik](https://orvik.app/)

2. [Compare](https://orvik.app/compare/)

3. Merlin Bird ID vs Picture Bird

Merlin Bird ID vs Picture Bird

# Merlin Bird ID or Picture Bird: is the paid one worth it?

Most comparisons on this site end in "it depends". This one does not, and it is worth explaining why rather than just asserting it. Merlin is not free because it is a limited version of something — it is free because a university research programme publishes it as outreach, backed by data assets no commercial publisher can buy.

Compared **Merlin Bird ID · Picture Bird** Price data **US App Store** Store data **2026-09-03** Updated **2026-09-04**

Short answer

**Merlin**, and it is not close. It is free with **no in-app purchases**, published by the Cornell Lab of Ornithology, rates 4.9 from 112,000 reviews, and its live Sound ID names several birds singing at once. Picture Bird carries 3 purchase tiers from $3.99 to $39.99 and does not match it on the hardest part of the job.

## Which should you pick?

- **Merlin Bird ID** You want to identify birds. By photograph, by five questions, or by **sound**, which is how most birds are detected in the first place.
- **Picture Bird** You specifically prefer its interface, or you want a single-purpose app with an encyclopaedia and no ties to a birding community.

## Side by side

*Side by side. Store figures are from the US App Store on 2026-09-03; scope and
 behaviour are from each app\'s own listing and from using it.*

|  | Merlin Bird ID | Picture Bird |
| --- | --- | --- |
| Published by | Cornell Lab of Ornithology, a university research programme | Next Vision Limited, a commercial publisher |
| Cost | **Free outright** | Free tier plus subscription |
| Rating | 4.9 (111,609) | 4.7 (40,029) |
| Works offline | Yes | No |
| Human verification | No | No |
| Download size | 311 MB | 128 MB |
| Languages | 31 | 13 |
| Last updated | 2026-08-24 | 2026-03-06 |
| Plants | — | — |
| Insects | — | — |
| Animals | — | — |
| Birds | Yes | Yes |
| Rocks | — | — |
| Collectibles | — | — |
| Food | — | — |
| Nature | — | — |

## What each one costs

*What each app actually charges. Every figure is read from the US App Store
 listing on 2026-09-03; in-app purchase tiers are Apple\'s own list, not a summary.*

| App | Download | In-app purchases | Cheapest | Dearest |
| --- | --- | --- | --- | --- |
| Merlin Bird ID | Free | **None** | — | — |
| Picture Bird | Free | 3 tiers | $3.99 | $39.99 |

## Sound is the whole argument

Photo identification of birds is a solved-enough problem that both apps do it adequately. Sound is not, and Merlin's Sound ID is the most impressive capability of any app in this whole comparison set.

It listens continuously and names species **as they sing, several at once**, drawing a live spectrogram with each identification labelled against the exact part of the recording that produced it. Standing in a wood at dawn with it running finds birds that experienced birders in the same spot had not registered.

This matters practically because **most birds are heard before they are seen**. A warbler in a canopy is a sound long before it is a photograph, and an app that only works from an image is unavailable for the majority of encounters.

## Why a commercial app cannot match it

The gap is not effort or engineering talent. It is two institutional assets.

**The Macaulay Library.** Decades of catalogued, expert-verified wildlife recordings from around the world, held by the Cornell Lab. That is the training data for Sound ID and it cannot be bought or scraped.

**eBird.** Hundreds of millions of checklists recording what species were actually present, where and when. Merlin uses that as a prior: it does not merely ask what this bird looks or sounds like, it asks what is plausible in your county in this week. That prior does an enormous amount of work and it is why Merlin's accuracy holds up on hard birds.

A commercial publisher can build a good classifier. It cannot build a century of ornithology, which is the actual product.

## What each costs, and what free means here

On 2026-09-03, Merlin listed **no in-app purchases at all**. Not a free tier — nothing inside it to buy. Picture Bird listed 3 tiers between $3.99 and $39.99.

Merlin is free for the same reason a museum is: the Cornell Lab is a membership-funded research programme whose purpose includes getting people to care about birds, and a paywall would work against that. The app is outreach, and it is extremely well made outreach — 4.9 from 112,000 reviews is among the highest ratings any app in this comparison holds.

Picture Bird is a perfectly competent product. The difficulty is structural: it has to justify a subscription against a free app that is better at the hard part, has more reviews and a higher rating, and comes from an institution people already trust on birds.

## Three routes to a name

Merlin offers three, and the least-used one is often the best.

- **Sound ID.** Live listening. Use this first, always, and leave it running while you walk.
- **Photo ID.** The conventional route, and Merlin is good at it — helped, again, by weighting against what is plausible where you are.
- **The five questions.** Where were you, when, how big was it, what colours, what was it doing. This is a classic identification key in app form, it works with no photograph and no recording, and it is what you use for the bird that flew off. It also teaches you what to look at, which neither of the other two does.

The wizard is the underrated one. Birders who learn to answer it well get better at birding, because the questions are the ones a field guide would ask.

## Setting Merlin up so it works

Most complaints about Merlin are configuration, and four minutes at home fixes them.

1. **Download the regional bird pack over wifi** before you go. The packs are large and Merlin cannot identify offline without one.
2. **Download packs for where you are travelling**, not only where you live. A pack for the wrong continent produces confident nonsense.
3. **Allow microphone access** and test Sound ID before you need it.
4. **Keep location on.** The eBird prior is most of the accuracy, and it needs to know where you are.
5. **Check the noise-reduction setting** if recordings sound over-processed — heavy processing can strip the quiet birds you were trying to catch.

## What neither app does

Both identify birds and stop there. Neither will help with a **feather on the path**, an **egg in a nest** or a **nest with no bird in it**, and those are common finds.

That is not a failing — those are identified from characters you list rather than photograph: the length and pattern of a feather, the ground colour and markings of an egg and the nest it sat in. We built free browser keys for
- [feathers](https://orvik.app/tools/feather-identifier/) and
- [eggs](https://orvik.app/tools/bird-egg-identifier/) for exactly that reason.

One legal note worth carrying: in the United States it is illegal to possess the feathers, eggs or nests of almost any native bird under the Migratory Bird Treaty Act, including things found on the ground. Photograph and leave them.

## Questions people ask

Is Merlin Bird ID free?

Completely. Its US App Store listing carried **no in-app purchases at all** on 2026-09-03 — no subscription, no unlock, nothing to buy inside it. It is published by the Cornell Lab of Ornithology, a membership-funded university research programme, and the app is outreach rather than a product.

Is Picture Bird worth paying for?

It is hard to construct the case. It works and its interface is tidy, with 40,000 ratings at 4.7 stars, but it costs $3.99 to $39.99 against a free app that rates 4.9 from 112,000 reviews and is better at sound identification. If you want to spend money on birds, membership of the Cornell Lab or Audubon buys more than a subscription does.

How does Merlin identify bird songs?

It listens continuously and matches against the Macaulay Library — decades of expert-verified recordings held by the Cornell Lab — while weighting predictions by what eBird checklists say is actually present near you at that time of year. It draws a live spectrogram and labels each identification against the part of the recording that produced it, naming several species singing at once.

Does Merlin work offline?

Yes, once you have downloaded the bird pack for your region, and only then. The packs are large, so get them over wifi before travelling, and download packs for where you are going rather than only where you live. Keep location services on, because Merlin's accuracy depends heavily on knowing what is plausible where you are.

What is the difference between Merlin and eBird?

Merlin identifies; eBird records. They are companion apps from the same Cornell Lab and both are free with no in-app purchases. Use Merlin to work out what a bird is, eBird to log the sighting and to see what other birders are reporting nearby. Neither does the other's job.

Can either identify a feather or an egg?

No, and that is reasonable — both are identified from characters you list rather than photograph. Our free
- [feather key](https://orvik.app/tools/feather-identifier/) and
- [egg key](https://orvik.app/tools/bird-egg-identifier/) cover those. Note that in the United States it is illegal to possess the feathers or eggs of almost any native bird, including ones found on the ground, so photograph and leave them.

## Or skip the choice and carry one app

Orvik covers plants, insects, animals, birds, rocks, collectibles, food and natural phenomena in a single camera. Free to download, and the near-misses stay visible so you can check the call.

- [Get Orvik free](https://orvik.app/app/)

## Keep reading on Orvik

- [What to put alongside Merlin](https://orvik.app/alternatives/merlin/)

- [The Merlin bird app, reviewed](https://orvik.app/birds/merlin-bird-app/)

- [Identify a bird by sound](https://orvik.app/birds/identify-bird-by-sound/)

- [Is there a Shazam for bird calls?](https://orvik.app/birds/shazam-for-bird-calls/)

- [Whose egg is this?](https://orvik.app/tools/bird-egg-identifier/)

- [Which bird did this feather come from?](https://orvik.app/tools/feather-identifier/)

- [Bird call identification](https://orvik.app/birds/bird-call-identification/)

- [What bird is this?](https://orvik.app/birds/what-bird-is-this/)

## Other comparisons

- [Merlin or eBird: which Cornell app do you actually need?](https://orvik.app/compare/merlin-vs-ebird/)
- [Merlin or the Audubon Bird Guide: scanner against field guide](https://orvik.app/compare/merlin-vs-audubon/)
- [Seek by iNaturalist alternatives — for when Seek says nothing](https://orvik.app/alternatives/seek/)
- [iNaturalist alternatives — for when you cannot wait, or cannot post](https://orvik.app/alternatives/inaturalist/)
- [Merlin Bird ID alternatives — what to put next to it, not instead of it](https://orvik.app/alternatives/merlin/)
- [Google Lens alternatives for identifying nature](https://orvik.app/alternatives/google/)
- [Orvik or Seek: paying for the half that was never alive](https://orvik.app/compare/orvik-vs-seek/)
- [Orvik or Google Lens: identification against visual search](https://orvik.app/compare/orvik-vs-google/)

## Where these figures come from

- Prices, in-app purchase tiers, ratings, versions, download sizes and update dates are read from each app’s **US App Store listing on 2026-09-03** using Apple’s own Lookup API and product pages. Nothing on this page is a figure somebody typed from memory, and the build fails if one appears.
- Apple does not publish billing periods next to in-app purchase names, so where two tiers share a name they are usually the same subscription billed over different terms. Check the current price in the App Store before you buy anything.
- Scope and behaviour — what each app identifies, whether it works offline, whether a human confirms the result — come from the apps’ own listings and from using them.
- Orvik is our app. We have tried to be specific about where these competitors are better, because a comparison that never concedes anything is not worth reading.

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