# Oxygen Advantage® vs Second Brain Grappling

The clearest difference is in-app purchases: Oxygen Advantage® at none against Second Brain Grappling's 4. Oxygen Advantage® also leads on iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Second Brain Grappling sells 4 in-app purchases, starting at $9.99 per month. Oxygen Advantage® asks for nothing beyond the download.

## The numbers

| Metric | Oxygen Advantage® | Second Brain Grappling |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (106 ratings)](https://appshunter.io/ios/app/oxygen-advantage/id1589260950/reviews)** | — |
| Number of ratings | **106** | — |
| Positive reviews | 74.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | — |
| Size | 75 MB | 95 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Oxygen Research Institute Ltd.](https://appshunter.io/developer/1589260952) | [Maximilian Boscha](https://appshunter.io/developer/6809483814) |

## What reviewers say

### Oxygen Advantage®

[App page](https://appshunter.io/ios/app/oxygen-advantage/id1589260950)

This app offers a personalized daily breathing plan with guided exercises, meditations, and mindfulness coaching to improve physical and mental well-being. It focuses on functional nasal breathing to enhance performance, reduce anxiety, and promote better sleep. Suitable for all ages and fitness levels, it helps build healthy breathing habits.

**Highlights:** Customizable daily breathing plan, Guided meditations and breathwork, Instructional videos library, Breathing pacer with adjustable speed, Progress tracking with charts and graphs, Reminders and custom notifications, Buteyko Breathing Method for kids

**Features:** macOS Compatibility

**In-app purchases:** none


### Second Brain Grappling

[App page](https://appshunter.io/ios/app/second-brain-grappling/id6809483812)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Grappling Monthly Pro | $9.99 | per month |
| 500 Brain Credits | $3.99 | one-time |
| 1,500 Brain Credits | $14.99 | one-time |
| 5,000 Brain Credits | $41.99 | one-time |


## Frequently asked questions

### Is Oxygen Advantage® free?

Oxygen Advantage® is free to download, with no in-app purchases.

### Is Second Brain Grappling free?

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

### Do Oxygen Advantage® or Second Brain Grappling have ads?

Neither Oxygen Advantage® nor Second Brain Grappling shows ads.

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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.*