# 40Hz Gamma vs Aura Sync

The clearest difference is price: Aura Sync at Free against 40Hz Gamma's $4.99. 40Hz Gamma's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 26.0). On update cadence, ads and in-app purchases there is nothing between them.

Aura Sync is free to download; 40Hz Gamma costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

40Hz Gamma ships an update every 4 days, Aura Sync every 3 days. Both last shipped on September 22, 2026.

## The numbers

| Metric | 40Hz Gamma | Aura Sync |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/40hz-gamma/id6752361990/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | Paid | — |
| Size | 38 MB | 213 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [秀银 林](https://appshunter.io/developer/1835808687) | [Eric Dolecki](https://appshunter.io/developer/347369705) |

## What reviewers say

### 40Hz Gamma

[App page](https://appshunter.io/ios/app/40hz-gamma/id6752361990)

This app offers advanced brain stimulation through precisely calibrated audio and visual signals. It aims to help users achieve states of deep focus and tranquility using neuroscience-backed techniques. Explore various professional audio modes and advanced gamma visuals for cognitive wellness.

**Highlights:** Professional audio modes (e.g., Binaural Beats, Monaural Beats), Advanced gamma visual stimulation (e.g., Sine Wave, Drifting Grating), Precision frequency tuning (38Hz-42Hz), Ambient sound library with white noise, Mixer for 40Hz waves and ambient sounds, Offline functionality, no data collection

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

**In-app purchases:** none


### Aura Sync

[App page](https://appshunter.io/ios/app/aura-sync/id6753081069)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 40Hz Gamma free?

40Hz Gamma costs $4.99, with no in-app purchases.

### Is Aura Sync free?

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

### Do 40Hz Gamma or Aura Sync have ads?

Neither 40Hz Gamma nor Aura Sync shows ads.

### Which is updated more often, 40Hz Gamma or Aura Sync?

40Hz Gamma ships an update every 4 days, and Aura Sync every 3 days. Most recently, 40Hz Gamma was updated on September 22, 2026 and Aura Sync on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*