Hear a bird. Know its name.
Blackbird
Turdus merula
Robin
Erithacus rubecula
Great tit
Parus major
Chiffchaff
Phylloscopus collybita
Chorus listens for ten seconds, draws the song and names the singer — even where there is no signal.
A song, saved
Heard
Identifying…
05:12 · Garden, Trnovo
Checked
Blackbird
Turdus merula · 05:12 · Garden, Trnovo
Kept
Blackbird
Turdus merula · 05:12 · Garden, Trnovo
First, it listens for ten seconds
Then it draws what it heard
Then it names the singer
Last, it keeps the morning
Listening0:07
Hold still. Point the phone at the sound.
Spectrogram8 kHz
Pitch upwards, time across. Each species draws its own shape.
Great tit
Parus major
This morning6 birds
- Great tit07:15
- Robin06:40
- Blackbird05:12
- Wren05:03
RobinTaščicaRotkehlchen
Erithacus rubecula
Saved on the phone · syncs laterSynced
Your notes, your way
Names in your language.
Every bird in English, Slovenian or German — switch whenever you cross a border.
Latin when you want it.
Scientific names under every common one, for the field guide and the arguments afterwards.
Works where the signal doesn’t.
The whole European catalogue lives on the phone. Notes wait and sync when you are back in range.
Easy on the eyes at five.
A night palette for the dark before dawn, so you don’t blind yourself or the birds.
Send it as a postcard.
Turn any note into a card with the plate and the song, ready to share.
Chorus knows the 236 birds that sing in Europe, each with its song, its calls and the names people give it in nine languages.
€0 for ever
Five songs a day, the life list and every bird’s name in three languages. No account needed.
Start Free€2.99 a month
Unlimited songs, the whole catalogue offline, field notes with spectrograms and export to your records.
Start Field€4.99 a month
Everything in Field for up to five people, with one shared list for the household’s garden.
Start FamilyQuestions
Does it work without a signal?
Yes. The whole European catalogue is on the phone, about 380 MB. Notes are saved on the phone and sync when you are back in range.
How sure is it?
It shows how sure it is with every answer. In our tests on clear recordings it names the right bird nine times in ten; in wind, traffic or a crowded dawn chorus it says when it isn’t sure.
Which birds does it know?
The 236 species that breed or winter in Europe, with their songs and their calls. Birds from further away are coming, continent by continent.
Does it record people?
It keeps ten seconds and only when you press the button. Voices are cut out of the recording before it is saved.
What happens to my recordings?
They stay on your phone unless you share them. If you choose, they can help train the next version — anonymously, and you can take them back.
Can I export my life list?
With Field or Family: as a spreadsheet, or straight to the national bird records where they accept it.
Is there a one-off price?
Not yet. Field costs €29 a year if you pay yearly, and the free plan never runs out.
Open it tomorrow at dawn
Free to download. Five songs a day cost nothing, for ever.