# Opti Brain vs NatureWalk

The clearest difference is in-app purchases: NatureWalk at none against Opti Brain's 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. NatureWalk asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Opti Brain | NatureWalk |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 159 MB | 93 MB |
| Requires iOS | 12.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optiherence](https://appshunter.io/developer/948846804) | [BrainTrain Inc.](https://appshunter.io/developer/584469134) |

## 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 |


### NatureWalk

[App page](https://appshunter.io/ios/app/naturewalk/id1091288409)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Opti Brain free?

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

### Is NatureWalk free?

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

### Do Opti Brain or NatureWalk have ads?

Neither Opti Brain nor NatureWalk shows ads.

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

Opti Brain ships an update every 3 months, and NatureWalk every 3 months. Most recently, Opti Brain was updated on October 5, 2026 and NatureWalk on October 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.*