# Opti Brain vs MindViewer

The clearest difference is review sentiment: Opti Brain at 37% against MindViewer's 0%. Opti Brain also leads on iOS requirement (12.4 vs 15.0). MindViewer's advantage is in-app purchases (none vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Opti Brain sells 2 in-app purchases, starting at $9.99 per month. MindViewer asks for nothing beyond the download.

Opti Brain ships an update every 3 months, MindViewer every 4 months. The most recent releases landed on September 10, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Opti Brain | MindViewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (13 ratings)](https://appshunter.io/ios/app/opti-brain/id1029982015/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | **36.7% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 159 MB | 126 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optiherence](https://appshunter.io/developer/948846804) | [Neeuro Pte Ltd](https://appshunter.io/developer/960758140) |

## What reviewers say

### Opti Brain

[App page](https://appshunter.io/ios/app/opti-brain/id1029982015)

Visualize and map your brain activity using compatible headbands. Record, save, and compare brain data to understand your cognitive patterns. Discover your optimal performance state and analyze brain activity during various activities.

**Highlights:** Brain activity mapping, Data collection and saving, Customizable collections, Map and movie creation, Brain pattern interpretation, Activity-based comparison

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Opti Subscription | $9.99 | per month |
| Yearly Opti Subscription | $99.99 | per year |


### MindViewer

[App page](https://appshunter.io/ios/app/mindviewer/id1436471710)

Understand your mental state during activities like studying, working, or resting. This tool visualizes your attention, relaxation, and mental workload using brain signal data from a compatible sensor.

**Highlights:** Visualize mental states, Track attention and relaxation, Measure mental workload, Analyze brain frequencies (delta, theta, alpha, beta, gamma), Record mental state during activities, Compare effectiveness of different activities

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

**In-app purchases:** none


## Frequently asked questions

### Is Opti Brain free?

Opti Brain is free to download, with in-app purchases available.

### Is MindViewer free?

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

### Do Opti Brain or MindViewer have ads?

Neither Opti Brain nor MindViewer shows ads.

### Which is updated more often, Opti Brain or MindViewer?

Opti Brain ships an update every 3 months, and MindViewer every 4 months. Most recently, Opti Brain was updated on September 10, 2026 and MindViewer on September 18, 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.*