Circadia is an unbelievably simple, devilishly tricky, visual masterpiece.

The premise is simple enough. Each of the levels in Circadia feature a constellation of musical colors seeking a rhythm. To solve the puzzle you must figure out the sequence. Just get the color bursts to converge on the white dot at the same time.

What's so hard about that?

At the beginning, it's one of simplest games you'll ever play, by the end, you'll be amazed how this basic interaction continues to find new ways to keep you challenged and stumped.

Circadia is a unique rhythm puzzler that features 100 unique ear bending puzzles meticulously designed to challenge your senses. It's not like any puzzle game you've ever played before.

Enjoy with caution.


Super simple pick up gameplay for all ages

100 beautifully crafted levels

Play morning, noon, or night with infinity mode

6 fantastic mood inducing instruments

Full iCloud integration so your progress saves on all devices

Game Center achievements

Optimized for iPad Retina, iPhone 5, iPad, iPhone, and iPod

And here is what the press thinks about Circadia:

"Extremely clever stuff"
- Edge

"Expect to have your eyes and ears fully occupied."
- Touch Arcade

"Opens up like a fine wine"
- G4TV

"Re-tunes your brain, harmonizing it with a cadence that lets you hear the world differently."
- Kotaku

"A brilliant puzzle game where failure is just as satisfying as success."
- Penny Arcade

What's New

Version 1.3

Hello World!

I am so happy to be announcing this new update for Circadia! In the year since I released Circadia over 100,000 of you have played it completely blowing any expectations I ever had for this humble artistic puzzler. Thank you so much.

You have collectively fueled my passion as a game designer and enabled me to continue to challenge myself each day. For that, I am infinitely grateful.

So, you may be wondering what's in this new update. Well, read on:

iPhone 5 formatted! That's right, now you can play Circadia on Apple's cutting edge retina screen without any letterboxing. Very nice!

Infinity Mode has been added. So many of you asked for some way to enjoy Circadia without having to be stuck on a level. It took a while to figure it out, but I am happy to tell you that now you can enjoy Circadia before bed, when you wake up, on the subway, whenever, and without having to play the current level that makes you want to throw your iDevice across the room. Once you select infinity mode Circadia will design random 2 and 3 button levels forever. The levels won't get any more difficult than that. It's an essential addition, and even managed to surprise me by making levels I had never considered :)

5 new sound sets: I'm guessing by now you're a little tired of hearing those same bells over and over and over again. Well, it was a surprisingly involved task to find other instruments that would compliment the simplicity of the aesthetic but 5 sounds really stood out to me and expanded the Circadia experience. From a celebrity sampled piano to some zenified Tibetan gongs there's a depth and resonance that will keep you in a state of relaxation. Of course, if you're not using headphones, you're missing out.

Orientation flipping seems like it would be a super simple update, and it is! Until you factor in that Circadia was the first game I coded and I didn't know how to do it. Well, those days are long gone. Flip your phone up or down, down or up, it's all good ;)

Unlock all levels purchase: I added a purchase link in the menu that will unlock all levels. I realize that people experience games differently and some may enjoy Circadia much much more if they could jump to any level they desire. For those who do, this will now be a purchasable option.

Bugs: Yup, fixed a few bugs. I addressed the loading issue some of you have still been experiencing. I fixed the issue where you choose to rate Circadia and return to the game only to endlessly be asked to rate it (so sorry about that, just had to do with saving your state before leaving the game to go to the review page, thank you for all your wonderful reviews). Fixed another issue where Circadia would shutdown if you left the game, I assume causing some save issues. Finally, it's not a bug, but I moved some of the more difficult levels in the beginning to a little bit later so players can see levels where the white dot moves sooner.

Ok, that should cover all the bases. I'm really so thankful for your support. You have no idea how the support from this game has changed me in such monumental ways.


Kurt Bieg
Simple Machine

Ratings and Reviews

4.5 out of 5

10K Ratings

10K Ratings



This game is so addictive!!! It's a brain buster too. You start with a colored sphere/circle and when you tap it, it releases a ring/band that expands in equal directions. It sounds stupid but it gets better. The objective is to get the bands of the colored spheres to intersect simultaneously over the white dot. Again stupid right? But some of the bands go at a lower speed while other go faster so you have to time it just right and as you go higher in each level the white dot starts to move so you have to time it just right. It's a puzzle and it seems so simple but it's not - the challenge of figuring out the right combination and working out the timing is what makes this a fun game and passing each level becomes addictive because you want to see what the next curve ball will be. Totally worth it and some fun sound effects too! Enjoy :-)!

Relaxing, yet Intense. Your Brain will thank you!


I'm critical of all apps/games though this is a Beautifully well done Masterpiece! Download it, you will not put it down. Use Headphones for a brilliant environmental takeover and NEW SOUNDS. New In-App purchase options available so you can unlock all levels and not get stuck on one which frustrates you to the point of wanting to hurl your i-device and yourself out of the nearest window. What's this clever infinity mode? Find out! Endless possibilities. How can one game be so silky relaxing AND pulse-driven intense? Minimalism at its most skeletal perfection!
•I don't write Reviews but this is an exception to the rule.

Amazing Developer, Cute, Humble, took time & love from Fans to improve an already 5 star game. Thank You so much 👏 Cyber Hug to you!
~From Texas with Love!

Feast for the Senses


All movement on your screen is smooth and satisfying. Relaxing. Sounds are like the soothing single notes of a xylophone. When you achieve the goal of each level, the two notes combine realistically to create a pleasant combined tone. Same concept with the colors you see. Each circle is a rich shade of all the familiar colors of the rainbow. When each level is complete, the colors combine realistically, as if mixed on a palette. However, when your target starts moving, you cease to be indulged. Then you have to actually WORK for your goal! Every level is worth the effort.



Simple Machine, LLC
21.4 MB
Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2011, Simple Machine, LLC
In-App Purchases
  1. unlock all levels $0.99


  • Family Sharing

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

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