# Gamma 40 Hertz vs Aura Sync

The clearest difference is in-app purchases: Aura Sync at none against Gamma 40 Hertz's 1. Aura Sync also leads on ads (none vs shown) and update cadence (every 3 days vs every 3 months). Gamma 40 Hertz's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price there is nothing between them.

Both are free to download. Gamma 40 Hertz sells 1 one-off in-app purchase. Aura Sync asks for nothing beyond the download.

Gamma 40 Hertz ships an update every 3 months, Aura Sync every 3 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Gamma 40 Hertz | Aura Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (32 ratings)](https://appshunter.io/ios/app/gamma-40-hertz/id6444579052/reviews)** | — |
| Number of ratings | **32** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 213 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alterscope Solutions LLC](https://appshunter.io/developer/1551052588) | [Eric Dolecki](https://appshunter.io/developer/347369705) |

## What reviewers say

### Gamma 40 Hertz

[App page](https://appshunter.io/ios/app/gamma-40-hertz/id6444579052)

This app offers a brain boost by stimulating 40 hertz gamma waves through light, sound, and touch. Research suggests this can help reverse age-related declines. It features adjustable intensity for multimodal stimulation.

**Highlights:** Multimodal stimulation (sound, touch, sight), Adjustable intensity, 40 Hz audio tone, 40 Hz haptic vibration, 40 Hz visual signal (flashlight), 40 Hz screen oscillation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Aura Sync

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gamma 40 Hertz free?

Gamma 40 Hertz is free to download, with in-app purchases available.

### Is Aura Sync free?

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

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

Gamma 40 Hertz shows ads; Aura Sync does not.

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

Gamma 40 Hertz ships an update every 3 months, and Aura Sync every 3 days. Most recently, Gamma 40 Hertz was updated on November 7, 2026 and Aura Sync on October 30, 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.*