# OpenViewer vs brainmate by Brain M8

The clearest difference is ads: brainmate by Brain M8 at none against OpenViewer's shown. brainmate by Brain M8 also leads on update cadence (every 8 days vs every 2 months). OpenViewer's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). On price 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.

OpenViewer ships an update every 2 months, brainmate by Brain M8 every 8 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | OpenViewer | brainmate by Brain M8 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/brainmate-by-brain-m8/id6780284752/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | — | Subscription |
| Size | 41 MB | 6 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BongJun Park](https://appshunter.io/developer/1887269135) | [Brain M8 LLC](https://appshunter.io/developer/6780284754) |

## What reviewers say

### OpenViewer

[App page](https://appshunter.io/ios/app/openviewer/id6763845346)

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

**In-app purchases:** none


### brainmate by Brain M8

[App page](https://appshunter.io/ios/app/brainmate-by-brain-m8/id6780284752)

This AI-powered productivity tool acts as your second brain, remembering key details about people, companies, and projects. It helps you stay organized with smart reminders and a daily pulse check, all while keeping your data secure and accessible.

**Highlights:** AI-powered note-taking and organization, Daily pulse for attention management, Plain markdown notes with interlinking, Follow-through reminders, Secure data storage and export

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenViewer free?

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

### Is brainmate by Brain M8 free?

brainmate by Brain M8 is free to download, with no in-app purchases.

### Do OpenViewer or brainmate by Brain M8 have ads?

OpenViewer shows ads; brainmate by Brain M8 does not.

### Which is updated more often, OpenViewer or brainmate by Brain M8?

OpenViewer ships an update every 2 months, and brainmate by Brain M8 every 8 days. Most recently, OpenViewer was updated on October 2, 2026 and brainmate by Brain M8 on October 6, 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.*