# Circadia vs OCO

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.

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.

## The numbers

| Metric | Circadia | OCO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (11K ratings)](https://appshunter.io/ios/app/circadia/id489615659/reviews) | [4.6 (2.4K ratings)](https://appshunter.io/ios/app/oco/id1030437345/reviews) |
| Number of ratings | **11K** | 2.4K |
| Positive reviews | **85.4% of reviews** | 73.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 102 MB | 113 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Simple Machine, LLC](https://appshunter.io/developer/440559596) | [SPECTRUM48 LIMITED](https://appshunter.io/developer/896496053) |

## What reviewers say

### Circadia

[App page](https://appshunter.io/ios/app/circadia/id489615659)

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.

**Highlights:** Tap dots to align rings, Hit the white dot simultaneously, Unique puzzle mechanics, Innovative game design, Challenging gameplay

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 🎶 Relaxing and soothing audio experience
- 👍 Unique and challenging gameplay
- 🧠 Mentally stimulating and engaging
- 🎨 Elegant and minimalist visual design

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔄 Lack of progress saving/syncing across devices
- 🔄 Orientation issues on certain devices
- 🕹️ Difficulty curve can be frustrating at times

**Reported bugs**

- Game freezes when asked to rate the app
- Compatibility issues with newer iOS versions

**Requested features**

- Ability to save progress and continue on other devices
- More levels and increased difficulty options
- Customizable audio options (e.g. different instrument sounds)


### OCO

[App page](https://appshunter.io/ios/app/oco/id1030437345)

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.

**Highlights:** Simple one-touch controls, Over 7000 challenging puzzles, Level editor and sharing system, Daily challenges, Minimalist design, Procedurally-generated soundtrack

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NO ADS | Free | one-time |
| x 2000 bits | $0.99 | one-time |
| x 5000 bits | $0.99 | one-time |
| Remove ads | $1.99 | one-time |
| x 8000 bits | $2.99 | one-time |
| OCO pro | $2.99 | one-time |
| x 30000 bits | $4.99 | one-time |
| x 100000 bits | $9.99 | one-time |

**What reviewers like**

- 👍 Smooth gameplay
- 🎨 Visually appealing
- 🎵 Great music/sound design
- 🧠 Challenging puzzles
- 🔓 Minimal ads

**What reviewers complain about**

- 🐛 Frequent crashes/bugs
- 💰 Paywalls/in-app purchases
- 🤢 Can cause motion sickness
- 🔍 Restart level button hard to access
- 🕰️ Perfect time scores don't make sense

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is Circadia free?

Circadia is free to download, with in-app purchases available.

### Is OCO free?

OCO is free to download, with in-app purchases available.

### Which has better reviews, Circadia or OCO?

Circadia and OCO are both rated 4.6 out of 5 on the App Store, from 11K and 2.4K ratings respectively.

### Do Circadia or OCO have ads?

OCO shows ads; Circadia does not.

### Which is updated more often, Circadia or OCO?

Circadia ships an update every 3 weeks, and OCO every 5 weeks. Most recently, Circadia was updated on October 7, 2026 and OCO on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*