Your loft,
your pigeons.
Pigeons drop by your loft — some of them want to stay. Send them out into the city, collect what they bring home, and dress them up.
Beta starts
Free · iPhone with iOS 18 or later · Everyone is invited at once on 1 October. The app is in German at first.
Your address is only used for the invite and deleted after the beta. More in the privacy policy.

/kuː/ · verb
- to make the soft, murmuring call of a pigeon or dove.
- to speak softly and fondly — about something you adore.
Collect

Send out

Dress up

Questions
Everything you should know before the beta.
What is COO?
A calm iPhone game about your very own pigeon loft. Pigeons visit, you take some in, send them on trips, collect what they find and dress them up. COO runs in real time: trips take hours, and at night everyone sleeps.
What does the beta cost?
Nothing. The beta is free, and there is nothing to buy in it.
Which iPhone do I need?
An iPhone running iOS 18 or later — roughly the iPhone XS from 2018 onwards.
What is TestFlight?
Apple's own app for beta versions. We collect sign-ups until the start on 1 October, then invite everyone at once; you get an email from Apple. Install TestFlight from the App Store and get COO through it. You can send feedback right from TestFlight, screenshot included.
Is COO available in English?
Soon. The beta starts in German; the English version follows in a later update.
What happens to my data?
We only use your email address to invite you to the beta and write to you about it — no newsletter. Inside the app everything stays on your iPhone; if you are signed in to iCloud, your progress is backed up there.
When does COO launch on the App Store?
As soon as the beta shows everything runs smoothly. Beta testers hear it first.