# Co vs Math Rocket

The clearest difference is rating: Math Rocket at 3.6 against Co's 2.6. Math Rocket also leads on review sentiment (28% vs 8%) and ratings volume (132 vs 17). Co's advantage is 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.

Math Rocket holds the better App Store score, 3.6 against 2.6. That said, the two scores are not equally well evidenced: Math Rocket has 132 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 8% of Co's written reviews are positive against 28% of Math Rocket's.

Co ships an update every 4 months, Math Rocket every 9 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Co | Math Rocket |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (17 ratings)](https://appshunter.io/ios/app/cowriter-universal/id915105799/reviews) | **[3.6 (132 ratings)](https://appshunter.io/ios/app/math-rocket-solve-equations/id1074373097/reviews)** |
| Number of ratings | 17 | **132** |
| Positive reviews | 8.3% of reviews | **27.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 45 MB | 1 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Don Johnston Incorporated](https://appshunter.io/developer/674099735) | [Erik Wegener](https://appshunter.io/developer/424482392) |

## What reviewers say

### 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


### Math Rocket

[App page](https://appshunter.io/ios/app/math-rocket-solve-equations/id1074373097)

This app challenges your brain with simple math problems to boost processing speed. It requires quick recognition of numbers and performing calculations using addition, subtraction, multiplication, and division. Regular play can improve quantitative skills and attention span.

**Highlights:** Increases brain processing speed, Trains recognition speed, Develops quantitative skills, Enhances attention span, Includes all four operators (+, -, x, ÷), Progressively challenging levels

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

**In-app purchases:** none


## Frequently asked questions

### Is Co free?

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

### Is Math Rocket free?

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

### Which has better reviews, Co or Math Rocket?

Math Rocket is rated higher. Co averages 2.6 out of 5 from 17 ratings, while Math Rocket averages 3.6 from 132 ratings.

### Do Co or Math Rocket have ads?

Neither Co nor Math Rocket shows ads.

### Which is updated more often, Co or Math Rocket?

Co ships an update every 4 months, and Math Rocket every 9 months. Most recently, Co was updated on November 1, 2026 and Math Rocket on November 2, 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.*