A person photographing a large tree in a city park
A naturalist's notebook for the world's trees

Spot a tree.
Name it. It's yours.

Claim the trees you love. Discover the ones already on the map.

4.8 from early naturalistsFree · iPhone
How it works

Three small acts of attention.

Hi, Tree is shaped around a slow, simple loop: notice, claim, return. The same three steps the app teaches you on day one.

01 / 03

Spot a tree and make it yours

Notice a tree you like. Take a photo, name it, and claim it.

02 / 03

Add it to the community map

Save it on the map and share it with others.

03 / 03

Create a forest of stories

Discover trees claimed by others, and add photos and field notes.

Keep them yours

A named tree likes
to be visited.

Claiming a tree is the start of a quiet friendship. Keep it company now and then and it stays yours; wander off for too long and it passes on to someone else on the map — so no tree is ever forgotten.

Drop by

Visit, and it stays yours

A check-in, a new photo, or a hello in Tree Chat keeps the bond alive. Look in on your tree every few weeks and it stays with you for good.

Or drift away

Quietly, it goes up for adoption

Let three weeks pass without a visit and your tree gently opens up for adoption — free for a new keeper to claim. We'll nudge you well before it slips away.

The story carries on

A tree remembers its keepers

When a tree finds a new keeper, everyone who tended it before stays part of its story — a small chain of the people who once said hello.

Active keepers never lose a tree — visiting always resets the clock.

Tree Chat

Every tree has
something to say.

Once you've claimed a tree, you can ask it about itself. Tree Chat is a quiet ritual — not a chatbot gimmick. It's a small, considered space to wonder out loud about something that's been quietly outliving us.

"The thing about being an oak is the patience. I've been waiting since the Kennedy administration."
— Olivia, a Northern red oak in Highland Park
Grounded in your tree's species & location
The community map

Claimed by people, all over the world.

Every pin is someone's noticed tree. The map grows with each claim — a slow, distributed atlas of attention.

Aerial view of a public park with tree canopies, lawns, paths and a small pond
14,820
trees claimed
3,200+
naturalists
42
countries
1,160
species spotted
A leaderboard ranks the most active naturalists — but Hi, Tree isn't a contest. The point is the noticing, not the score.
Epic Trees

Some trees are
already legends.

Scattered across the map are Epic Trees — the notable ones we've gathered for you to discover. Any of them is free to adopt, and each comes with a story worth passing on.

Already on the map, waiting for a keeper

We've seeded the map with remarkable, storied trees — champion oaks, town-square giants, trees older than the country they stand in. None are claimed yet.

A mark of their own

Epic Trees wear a special badge so they stand out among the everyday ones. Spot one glowing on the map and you know it has a story.

A memorable first tree

Because each one is already documented, an Epic Tree makes a wonderful first claim — find one near you, give it a name, and it's yours.

An Epic Tree — a grand coast live oak — on the Hi, Tree map
Epic Tree
Field-note moments

A few trees, recently noticed.

Questions

Things people
often ask.

If you're curious about something not covered here, we'd genuinely love to hear from you.

hello@hitree.app

Legal: Privacy Policy · Terms

Yes — Hi, Tree is free to download and use. We're working on a Pro tier with extras like richer Tree Chat and unlimited field notes, but the core experience will always be free.

Start a small, slow collection.

Hi, Tree is on iPhone. Pick a tree on your walk home today.

Download on theApp Store