# Noise Generator vs HemiSync

The clearest difference is rating: Noise Generator at 4.7 against HemiSync's 4.2. Noise Generator also leads on in-app purchases (none vs 1) and ratings volume (2K vs 9). HemiSync's advantage is ads (none vs shown) and review sentiment (100% vs 75%). On price and monetization model there is nothing between them.

Both are free to download. HemiSync sells 1 in-app purchase, starting at $0.99 per month. Noise Generator asks for nothing beyond the download.

Noise Generator holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Noise Generator has 2K ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 75% of Noise Generator's written reviews are positive against 100% of HemiSync's, so the app with the better star average is not the one people write more warmly about.

Noise Generator ships an update fortnightly, HemiSync every 5 weeks. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Noise Generator | HemiSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (2K ratings)](https://appshunter.io/ios/app/noise-generator-full-spectrum/id1206450560/reviews)** | [4.2 (9 ratings)](https://appshunter.io/ios/app/hemisync/id6751762821/reviews) |
| Number of ratings | **2K** | 9 |
| Positive reviews | 74.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 61 MB |
| Requires iOS | **15.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TMSOFT](https://appshunter.io/developer/288669797) | [EngineZero](https://appshunter.io/developer/1573141529) |

## What reviewers say

### Noise Generator

[App page](https://appshunter.io/ios/app/noise-generator-full-spectrum/id1206450560)

Generate a variety of custom color noises, including brown, pink, white, blue, and violet. Fine-tune your audio experience with low and high cut filters. This app offers a simple interface that remembers your settings for quick, personalized sound generation.

**Highlights:** Generate brown, pink, white, blue, and violet noise, Low and high cut filters for customization, Simple interface remembers settings, Advanced mathematical formulas for audio generation, AirPlay support for external devices

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Spot on performance
- 👍 Customizable noise options
- 🚀 Wide range of frequency spectrum
- 👍 Convenient for sleeping and focus
- 👍 Helps with tinnitus and anxiety

**What reviewers complain about**

- 🐛 Crashes and stops working
- 🐛 Ads interfere with functionality
- 🔋 High battery drain
- 🐛 Unreliable, cuts out randomly
- 🐛 Detectable sound pattern loop

**Reported bugs**

- Scrolling issues on iPhone 13 Pro
- Beeping noise looping in background
- Stops playing when app is in background

**Requested features**

- Add green noise option
- Ability to save custom presets
- Include a sleep timer
- Landscape mode support
- Equalizer/smoother frequency controls


### HemiSync

[App page](https://appshunter.io/ios/app/hemisync/id6751762821)

This app generates binaural beats and isochronic tones to aid in meditation and relaxation. Explore various sound frequencies and pre-set combinations for personal wellness routines, with customizable timers and controls.

**Highlights:** Binaural beat and isochronic tone generation, Customizable frequency ranges (Delta, Theta, Alpha, Beta, Gamma), Pre-configured audio presets, Session timer functionality, Solfeggio frequency options

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | per month |


## Frequently asked questions

### Is Noise Generator free?

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

### Is HemiSync free?

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

### Which has better reviews, Noise Generator or HemiSync?

Noise Generator is rated higher. Noise Generator averages 4.7 out of 5 from 2K ratings, while HemiSync averages 4.2 from 9 ratings.

### Do Noise Generator or HemiSync have ads?

Noise Generator shows ads; HemiSync does not.

### Which is updated more often, Noise Generator or HemiSync?

Noise Generator ships an update fortnightly, and HemiSync every 5 weeks. Most recently, Noise Generator was updated on October 11, 2026 and HemiSync on October 14, 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.*