# OCO vs Slime Spectrum

The clearest difference is in-app purchases: Slime Spectrum at none against OCO's 8. Slime Spectrum also leads on ads (none vs shown) and update cadence (daily vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. OCO sells 8 one-off in-app purchases. Slime Spectrum asks for nothing beyond the download.

OCO ships an update every 5 weeks, Slime Spectrum daily. The most recent releases landed on October 2, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | OCO | Slime Spectrum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (2.4K ratings)](https://appshunter.io/ios/app/oco/id1030437345/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 73.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 113 MB | 201 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SPECTRUM48 LIMITED](https://appshunter.io/developer/896496053) | [BattleRam Studios](https://appshunter.io/developer/1836797647) |

## What reviewers say

### 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


### Slime Spectrum

[App page](https://appshunter.io/ios/app/slime-spectrum/id6751784493)

Navigate challenging levels by changing your slime's color to match gates. Dodge traps and rising ink in this fast-paced puzzle game that tests reflexes, timing, and strategy.

**Highlights:** Color-changing slime, Match gates to progress, Dodge deadly traps, Escape rising ink, 50 unique levels, Fast-paced action

**In-app purchases:** none


## Frequently asked questions

### Is OCO free?

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

### Is Slime Spectrum free?

Slime Spectrum is free to download, with no in-app purchases.

### Do OCO or Slime Spectrum have ads?

OCO shows ads; Slime Spectrum does not.

### Which is updated more often, OCO or Slime Spectrum?

OCO ships an update every 5 weeks, and Slime Spectrum daily. Most recently, OCO was updated on October 2, 2026 and Slime Spectrum on September 21, 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.*