# Opti Brain vs That Smile App™

The clearest difference is rating: That Smile App™ at 5.0 against Opti Brain's 3.7. That Smile App™ also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). Opti Brain's advantage is ratings volume (13 vs 1) and iOS requirement (12.4 vs 15.6). On price, 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. That Smile App™ asks for nothing beyond the download.

That Smile App™ holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Opti Brain has 13 ratings behind it against 1, so its average is the more settled of the two.

Opti Brain ships an update every 3 months, That Smile App™ every 3 weeks. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Opti Brain | That Smile App™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (13 ratings)](https://appshunter.io/ios/app/opti-brain/id1029982015/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/that-smile-app/id6468306501/reviews)** |
| Number of ratings | **13** | 1 |
| Positive reviews | 36.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 159 MB | 148 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Optiherence](https://appshunter.io/developer/948846804) | [That Smile App LLC](https://appshunter.io/developer/1458451231) |

## 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 |


### That Smile App™

[App page](https://appshunter.io/ios/app/that-smile-app/id6468306501)

This app uses Smile Powered™ technology and a Guided Smiling™ experience to help you smile more, enhancing happiness and health. It tracks your smiles in real-time, allowing you to set goals, build streaks, and view progress through a dashboard. Explore articles on the science of smiling and its benefits for mental and physical well-being.

**Highlights:** Smile Powered™ technology, Guided Smiling™ experience, Real-time smile tracking, Goal setting and streak tracking, Progress visualization dashboard, Educational articles on smiling

**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 That Smile App™ free?

That Smile App™ is free to download, with no in-app purchases.

### Which has better reviews, Opti Brain or That Smile App™?

That Smile App™ is rated higher. Opti Brain averages 3.7 out of 5 from 13 ratings, while That Smile App™ averages 5.0 from 1 ratings.

### Do Opti Brain or That Smile App™ have ads?

Neither Opti Brain nor That Smile App™ shows ads.

### Which is updated more often, Opti Brain or That Smile App™?

Opti Brain ships an update every 3 months, and That Smile App™ every 3 weeks. Most recently, Opti Brain was updated on October 5, 2026 and That Smile App™ on September 26, 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.*