Skein: Nature ID & Food Webs

In-app purchases
Content rating
Everyone
50+
Downloads
Content rating
Everyone
Users Interact, Shares Location, In-App Purchases
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About this app

Point your camera at any plant, animal, bird, bug, or fungus and Skein tells you exactly what it is in seconds. Then it does something no other ID app does: it shows you how that species connects to everything else alive around you.

There has never been an app quite like Skein. Anything can name a species. Skein captures what they DO together, who eats who, who pollinates what, who lives on whom, and turns your finds into a living web only you have witnessed.

IDENTIFY ANYTHING, INSTANTLY
Snap a photo and get an answer in seconds, with a confidence score and the science to back it up. Plants, animals, birds, insects, fungi. If it is alive, Skein will have a go. You can even identify birds, frogs, and insects by their sound.

SEE HOW LIFE CONNECTS
This is the part that changes everything. Snap what you see, then snap what it interacts with, and Skein records the connection: a bee on a flower, a bird taking a berry, a spider and its prey. Each one becomes a connection in your personal food web. You are not just collecting creatures anymore. You are mapping the living relationships around you.

BUILD A LIVING FOOD WEB
Every creature you catch takes its place in a food web that grows as you explore. See the trophic levels, the predators and pollinators, and the gaps still waiting to be witnessed, verified by the community.

CHASE RARE FINDS AND RARE MOMENTS
Every catch is scored across seven rarity tiers, from everyday garden visitors to once-in-a-lifetime legends. And the rarest thing of all is not a species, it is catching two of them in the act of interacting.

EXPLORE A LIVING WORLD MAP
See what other naturalists are finding in the world. Nature is far stranger and more beautiful than you ever imagined.

JOIN A COMMUNITY OF NATURALISTS
Share your best finds, help verify the interactions others log, and become part of a growing community building the real map of how life fits together.

FREE AND UNLIMITED
Identifying is free with no daily limit. Collect, connect, and grow your web every day. Skein Pro goes deeper: the full depth of your food web and one-scan multi-species scenes, with no ads, ever. Try it free for 14 days.

Start your web today with Skein.
ID plants, animals, birds & bugs, then see the food web they live in.
Updated on
Sep 24, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Photos and videos and App activity
  • This app may collect these data types
    Photos and videos, App activity and 2 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Skein is here. Katch is now Skein, with a warmer new look throughout.

- The Community feed is alive: every catch now shows up, so there's always something new to see.
- Verify now shows where a photo was taken on a map, so you can make a sharper call on tricky IDs.
- Set your privacy to Private and your catches still appear, but as "Anon" with no name or location.
- Judge is now Verify, and other wording is clearer across the app.