Circlo is an ambient audiovisual clock. The ambient soundtrack by Hannu Kuosmanen changes depending on what time of day it is while the circles on the screen pulsate gently. The music is at its calmest around 1 am/pm, and gets more intense until the clock strikes 1 again.

Double-tap anywhere to access the settings screen where you can change the color scheme and turn the music on or off.

Design and programming by Johan Halin.
Music by Hannu Kuosmanen.


Johan Halin has also created Kontrol, an experimental techno composition that was shown in 2011 at the Museum of Modern Art in New York as part of the "Talk to Me" exhibition, and Revolve, an ambient reaction game.

What’s New

Version 1.1

This app has been updated by Apple to use the latest Apple signing certificate.

- Support for more devices.
- 64-bit support.

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

wikifix this ,

You out Eno'd Eno! Well bloody done.

Last bits of sun through heavy winter clouds in Notting Hill and Circlo fills the space brilliantly. Can work to this easy peasy.

Mississippi water dog ,

Very happy much yay

I love circlo! I wish it could be my lock screen

⭐️👶 ,

Amazing invention.

Thank you for sharing your talents with us!

App Privacy

The developer, Aero Deko, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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