Circadia vs OCO
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Circadia
Engage your mind with a challenging yet simple puzzle game. Tap dots to align rings with a central target simultaneously. Discover a unique and innovative gaming experience from a studio known for its creative titles.
- Tap dots to align rings
- Hit the white dot simultaneously
- Unique puzzle mechanics
- Innovative game design
- Challenging gameplay
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Tap dots and make all the rings hit the white dot at once. Simple? Sure, keep telling yourself that. Try it and see for yourself. STORY: In 2011 Circadia was the first big hit game from Simple Machine, makers of Pop the Lock, Calculator: The Game, and _-_. Circadia went on to become a Starbucks App of the Week and gathered a bunch of great fans. Try it and see how it inspired our path of making unique and innovative games. And to our fans, ESPECIALLY the ones who downloaded Circadia way way back in the day. Thank you for supporting us and sticking with us. We love making games for you and will continue to! This one is for you! Hugs, Team Simple Machine
OCO
Engage in a captivating one-touch puzzle-platformer with over 7000 levels. Master simple controls to navigate challenging environments, create your own levels, and enjoy a unique audio-visual experience. Compete in daily challenges and strive for perfect solutions.
- Simple one-touch controls
- Over 7000 challenging puzzles
- Level editor and sharing system
- Daily challenges
- Minimalist design
- Procedurally-generated soundtrack
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“OCO is an exceptionally clever one-touch puzzle-platformer” 8/10 Pocket Gamer “Gloriously addictive and intelligent puzzles” 8/10 Touch Arcade Immerse yourself in the beautiful audio-visual world of OCO Use simple one-touch controls to launch, rush, crash, glide, warp, and hang as you solve over 7000 fast-paced platforming puzzles FEATURES • Simple one-touch controls • Complex challenging puzzles • Precision platforming • 7000 hand-selected player-created levels • Create and share levels using OCO jpg levels system • Beautiful minimal design • Procedurally-generated soundtrack for every level • Built-in editor • Daily challenges • 'Discord' community • ‘Perfect solution’ challenges for all levels • 46 achievements AWARDS • Finalist 'Pocket Gamer People’s Choice Award', 2020 • Runner-up ‘Big Indie Pitch’, Develop, Brighton, 2018 • Finalist ‘Very Big Indie Pitch’ Pocket Gamer Connects, London, 2017
Screenshots
Verdict
The clearest difference is ads: Circadia at none against OCO's shown. Circadia also leads on review sentiment (85% vs 73%) and ratings volume (11K vs 2.4K). On price, rating, update cadence and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Circadia sells 1 one-off in-app purchase and OCO sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Circadia against 4.6 for OCO. Both are backed by a comparable volume of ratings — 11K and 2.4K respectively. Written reviews are what separate them: 85% of Circadia's written reviews are positive against 73% of OCO's.
Circadia ships an update every 3 weeks, OCO every 5 weeks. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.
| Parameter | Circadia | OCO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (11K ratings) | 4.6 (2.4K ratings) |
| Positive reviews | 85.4% of reviews — better | 73.0% of reviews |
| Number of ratings | 11K — better | 2.4K |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 102 MB | 113 MB |
| Age rating | 4+ | 4+ |
| Developer | Simple Machine, LLC | SPECTRUM48 LIMITED |
Customer experience
Circadia
OCO
User reviews
Circadia
From 11K App Store ratingsWhat we love
- 🎶 Relaxing and soothing audio experience
- 👍 Unique and challenging gameplay
- 🧠 Mentally stimulating and engaging
- 🎨 Elegant and minimalist visual design
Room to improve
- 🐛 Occasional bugs and crashes
- 🔄 Lack of progress saving/syncing across devices
- 🔄 Orientation issues on certain devices
- 🕹️ Difficulty curve can be frustrating at times
OCO
From 2.4K App Store ratingsWhat we love
- 👍 Smooth gameplay
- 🎨 Visually appealing
- 🎵 Great music/sound design
- 🧠 Challenging puzzles
- 🔓 Minimal ads
Room to improve
- 🐛 Frequent crashes/bugs
- 💰 Paywalls/in-app purchases
- 🤢 Can cause motion sickness
- 🔍 Restart level button hard to access
- 🕰️ Perfect time scores don't make sense
Bugs and requests
Circadia
Reported bugs
2 issues- Game freezes when asked to rate the app
- Compatibility issues with newer iOS versions
Requested features
3 requests- Ability to save progress and continue on other devices
- More levels and increased difficulty options
- Customizable audio options (e.g. different instrument sounds)
OCO
Reported bugs
4 issues- Game crashes on startup after updates
- Slow mode issue prevents level uploads
- Levels sometimes can't be opened
- Losing progress/data after updates
Requested features
5 requests- Add different beat/music options
- Allow liking levels without completing them
- Improve level saving/loading
- Add more block types (traps, flippers, etc.)
- Bring back online features
In-app purchases
Circadia
- Remove Ads$2.99
OCO
- NO ADSFree
- x 2000 bits$0.99
- x 5000 bits$0.99
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- Remove ads$1.99
- x 8000 bits$2.99
- OCO pro$2.99
- x 30000 bits$4.99
- x 100000 bits$9.99
