# Solve the Outbreak vs Co

The clearest difference is review sentiment: Solve the Outbreak at 96% against Co's 8%. Solve the Outbreak also leads on rating (4.6 vs 2.6) and ratings volume (61 vs 17). Co's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 12.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Solve the Outbreak holds the better App Store score, 4.6 against 2.6. Both are backed by a comparable volume of ratings — 61 and 17 respectively. Written reviews point the same way: 96% of Solve the Outbreak's written reviews are positive against 8% of Co's.

Solve the Outbreak ships an update every 5 months, Co every 4 months. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Solve the Outbreak | Co |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (61 ratings)](https://appshunter.io/ios/app/solve-the-outbreak/id592485067/reviews)** | [2.6 (17 ratings)](https://appshunter.io/ios/app/cowriter-universal/id915105799/reviews) |
| Number of ratings | **61** | 17 |
| Positive reviews | **95.7% of reviews** | 8.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 258 MB | 45 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [Don Johnston Incorporated](https://appshunter.io/developer/674099735) |

## What reviewers say

### Solve the Outbreak

[App page](https://appshunter.io/ios/app/solve-the-outbreak/id592485067)

Become a Disease Detective and solve simulated outbreaks by analyzing clues and data. Make critical decisions to contain diseases and save lives, earning badges and climbing ranks. Learn about real-world disease investigation in an engaging, game-like experience.

**Highlights:** Solve simulated outbreaks, Analyze clues and data, Make critical decisions, Earn badges and ranks, Learn about diseases, Challenge friends

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎮 Engaging gamification of learning epidemiology
- 📚 Educational and informative content about diseases
- 🧩 Excellent problem-solving and critical thinking challenges
- 👨‍🏫 Great tool for classroom and educational settings
- 🎯 Realistic case studies based on actual outbreaks

**What reviewers complain about**

- ⏱️ Limited replay value due to memorizable answers
- 📖 Heavy text-based content without visual aids
- 🖥️ Text too small on mobile devices
- 🎮 Linear gameplay with no branching outcomes
- 😴 Can become repetitive after completing cases

**Reported bugs**

- App crashes when attempting to reset scores in settings
- Old scores and progress remain after reset attempt
- Accidental question selection due to bottom screen placement

**Requested features**

- Add more outbreak cases and scenarios
- Create harder difficulty levels for advanced players
- Include visual aids and images for better understanding
- Add background music and sound effects
- Implement branching storylines with different outcomes


### Co

[App page](https://appshunter.io/ios/app/cowriter-universal/id915105799)

This app provides advanced word prediction and spelling support for students. It offers grammar-smart suggestions and access to millions of topic-specific dictionaries to aid in writing. Built-in text-to-speech functionality helps users review their work.

**Highlights:** Grammar-smart word prediction, Millions of topic-specific dictionaries, Flexspell™ technology for spelling errors, Built-in text-to-speech, Personalized vocabulary and settings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Solve the Outbreak free?

Solve the Outbreak is free to download, with no in-app purchases.

### Is Co free?

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

### Which has better reviews, Solve the Outbreak or Co?

Solve the Outbreak is rated higher. Solve the Outbreak averages 4.6 out of 5 from 61 ratings, while Co averages 2.6 from 17 ratings.

### Do Solve the Outbreak or Co have ads?

Neither Solve the Outbreak nor Co shows ads.

### Which is updated more often, Solve the Outbreak or Co?

Solve the Outbreak ships an update every 5 months, and Co every 4 months. Most recently, Solve the Outbreak was updated on November 3, 2026 and Co on November 1, 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.*