# iBrainstorm vs Co

The clearest difference is rating: iBrainstorm at 3.7 against Co's 2.6. iBrainstorm also leads on review sentiment (46% vs 8%) and iOS requirement (7.1 vs 10.0). Co's advantage is device support (3 vs 1). On price, ratings volume, update cadence and ads there is nothing between them.

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

iBrainstorm holds the better App Store score, 3.7 against 2.6. Both are backed by a comparable volume of ratings — 25 and 17 respectively. Written reviews point the same way: 46% of iBrainstorm's written reviews are positive against 8% of Co's.

Both ship on a similar rhythm, roughly every 4 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | iBrainstorm | Co |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (25 ratings)](https://appshunter.io/ios/app/ibrainstorm/id382252825/reviews)** | [2.6 (17 ratings)](https://appshunter.io/ios/app/cowriter-universal/id915105799/reviews) |
| Number of ratings | **25** | 17 |
| Positive reviews | **45.6% of reviews** | 8.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | Free |
| Size | 11 MB | 45 MB |
| Requires iOS | **7.1** | 10.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Erik Loehfelm](https://appshunter.io/developer/316060414) | [Don Johnston Incorporated](https://appshunter.io/developer/674099735) |

## What reviewers say

### iBrainstorm

[App page](https://appshunter.io/ios/app/ibrainstorm/id382252825)

This app allows users to capture and organize creative ideas on a digital canvas. Easily add notes, drawings, and arrange them visually. Share your brainstormed content seamlessly across devices.

**Highlights:** Multi-device collaboration, Add and drag-and-drop notes, Assign colors to notes, Digital drawing board, Zoom functionality, Capture and share ideas

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Great app for brainstorming and organizing ideas
- 👍 Simple and intuitive to use
- 🚀 Useful for quick note-taking and sketching
- 👍 Nice visual design and layout

**What reviewers complain about**

- 🐛 Occasional crashes or loss of data
- 🔍 Limited functionality (e.g. no undo, no resizing of notes)
- 🔍 Difficulty deleting or clearing the workspace
- 🔍 Lack of collaboration features (e.g. no multi-user support)

**Reported bugs**

- Sticky notes sometimes disappear after reopening the app
- Drawing tools can be laggy or unresponsive
- Difficulty connecting devices for collaboration

**Requested features**

- Add undo/redo functionality
- Allow resizing and formatting of sticky notes
- Implement multi-page or infinite workspace
- Enable collaboration between multiple devices
- Add support for inserting images and documents


### 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 iBrainstorm free?

iBrainstorm 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, iBrainstorm or Co?

iBrainstorm is rated higher. iBrainstorm averages 3.7 out of 5 from 25 ratings, while Co averages 2.6 from 17 ratings.

### Do iBrainstorm or Co have ads?

Neither iBrainstorm nor Co shows ads.

### Which is updated more often, iBrainstorm or Co?

iBrainstorm ships an update every 4 months, and Co every 4 months. Most recently, iBrainstorm was updated on November 1, 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.*