# Co vs Investigation Declaration

The clearest difference is rating: Investigation Declaration at 3.0 against Co's 2.6. Co's advantage is ratings volume (17 vs 2) 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.

Investigation Declaration holds the better App Store score, 3.0 against 2.6. That said, the two scores are not equally well evidenced: Co has 17 ratings behind it against 2, so its average is the more settled of the two.

Co ships an update every 4 months, Investigation Declaration every 3 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Co | Investigation Declaration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (17 ratings)](https://appshunter.io/ios/app/cowriter-universal/id915105799/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/investigation-declaration/id6743125653/reviews)** |
| Number of ratings | **17** | 2 |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 45 MB | 351 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Don Johnston Incorporated](https://appshunter.io/developer/674099735) | [iCivics, Inc.](https://appshunter.io/developer/915103251) |

## 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


### Investigation Declaration

[App page](https://appshunter.io/ios/app/investigation-declaration/id6743125653)

Embark on a historical investigation to uncover how Enlightenment ideas influenced the Declaration of Independence. Travel across time and the Atlantic world, collecting evidence to restore corrupted files and understand the spread of concepts like natural rights and state sovereignty.

**Highlights:** Explore 10 Atlantic world locations, Track Natural Rights, State Sovereignty, or Social Contract, Mad-lib style evidence linking, Historical scenes with narrative, Spanish translation and English voiceover, Glossary and classroom resources

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Co free?

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

### Is Investigation Declaration free?

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

### Which has better reviews, Co or Investigation Declaration?

Investigation Declaration is rated higher. Co averages 2.6 out of 5 from 17 ratings, while Investigation Declaration averages 3.0 from 2 ratings.

### Do Co or Investigation Declaration have ads?

Neither Co nor Investigation Declaration shows ads.

### Which is updated more often, Co or Investigation Declaration?

Co ships an update every 4 months, and Investigation Declaration every 3 months. Most recently, Co was updated on November 1, 2026 and Investigation Declaration on November 4, 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.*