# Co vs Chat Memo

The clearest difference is review sentiment: Chat Memo at 100% against Co's 33%. Chat Memo also leads on update cadence (weekly vs every 5 months). Co's advantage is iOS requirement (12.0 vs 15.0). 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.

Co ships an update every 5 months, Chat Memo weekly. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Co | Chat Memo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (9 ratings)](https://appshunter.io/ios/app/chat-memo-simple-note-app/id1465757390/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | Free |
| Size | 9 MB | 20 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [株式会社CWF](https://appshunter.io/developer/1619787817) | [Naoyuki Rikiji](https://appshunter.io/developer/1465757389) |

## What reviewers say

### Co

[App page](https://appshunter.io/ios/app/co-writing-studio/id1439900178)

This app facilitates music production collaboration by allowing users to record all interactions, share files, discuss revisions, and upload demos. It offers folder management for files, pin functionality for important comments, and private groups for member-exclusive sharing.

**Highlights:** Record all music production interactions, Share production files, Discuss revision points, Upload and review demos, Folder management for files, Pin important comments, Private group sharing

**Features:** macOS Compatibility

**In-app purchases:** none


### Chat Memo

[App page](https://appshunter.io/ios/app/chat-memo-simple-note-app/id1465757390)

A straightforward note-taking app designed for intuitive, one-line entries. It offers widget support for home screen access, character counting, and easy line-by-line copying. The app prioritizes a clean, ad-free experience for efficient memo management.

**Highlights:** One-line memo registration, Widget support, Character counting, Line-by-line selection and copying, Passcode protection, Image registration, Strike-through for TODO lists

**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 Chat Memo free?

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

### Do Co or Chat Memo have ads?

Neither Co nor Chat Memo shows ads.

### Which is updated more often, Co or Chat Memo?

Co ships an update every 5 months, and Chat Memo weekly. Most recently, Co was updated on October 15, 2026 and Chat Memo on October 9, 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.*