# Solve the Outbreak vs Number Line, by MLC

The clearest difference is review sentiment: Solve the Outbreak at 96% against Number Line, by MLC's 67%. Solve the Outbreak also leads on rating (4.6 vs 4.4) and update cadence (every 5 months vs every 13 months). On price, ads, in-app purchases and monetization model 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 4.4. Both are backed by a comparable volume of ratings — 61 and 15 respectively. Written reviews point the same way: 96% of Solve the Outbreak's written reviews are positive against 67% of Number Line, by MLC's.

Solve the Outbreak ships an update every 5 months, Number Line, by MLC every 13 months. The most recent releases landed on November 3, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Solve the Outbreak | Number Line, by MLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (61 ratings)](https://appshunter.io/ios/app/solve-the-outbreak/id592485067/reviews)** | [4.4 (15 ratings)](https://appshunter.io/ios/app/number-line-by-mlc/id751816884/reviews) |
| Number of ratings | **61** | 15 |
| Positive reviews | **95.7% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 13 months |
| Monetization | Free | Free |
| Size | 258 MB | 7 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | iPad | iPad |
| Age rating | 12+ | 4+ |
| Developer | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) | [The Math Learning Center](https://appshunter.io/developer/1542700905) |

## 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


### Number Line, by MLC

[App page](https://appshunter.io/ios/app/number-line-by-mlc/id751816884)

This app allows students to visualize number sequences and demonstrate mathematical strategies. It supports various number types and offers tools for annotation, problem-solving, and sharing work. Ideal for elementary classrooms and iPad learning environments.

**Highlights:** Visualize number sequences, Demonstrate counting, adding, subtracting, multiplying, dividing, Use whole numbers, fractions, decimals, or negative numbers, Add custom tick marks and labels, Hide and reveal numbers and jumps, Annotation and drawing tools, Save and share work

**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 Number Line, by MLC free?

Number Line, by MLC is free to download, with no in-app purchases.

### Which has better reviews, Solve the Outbreak or Number Line, by MLC?

Solve the Outbreak is rated higher. Solve the Outbreak averages 4.6 out of 5 from 61 ratings, while Number Line, by MLC averages 4.4 from 15 ratings.

### Do Solve the Outbreak or Number Line, by MLC have ads?

Neither Solve the Outbreak nor Number Line, by MLC shows ads.

### Which is updated more often, Solve the Outbreak or Number Line, by MLC?

Solve the Outbreak ships an update every 5 months, and Number Line, by MLC every 13 months. Most recently, Solve the Outbreak was updated on November 3, 2026 and Number Line, by MLC 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.*