Comparison

Noise Generator vs HemiSync

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Noise Generator

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
Read full description

Generate custom color noises including brown, pink, white, blue, and violet. Customize noise further by using low and high cut filters. Simple modern interface remembers all settings for quick generation and utilizes advanced mathematical formulas to generate all audio waves. There are no audio files included in the application binary which keeps app size to a minimum and app performance to a maximum. What are benefits of listening to white noise? - Helps you sleep by blocking distractions - Pacifies fussy and crying babies - Relaxes and reduces stress - Increases focus while enhancing privacy - Soothes headaches and migraines - Masks tinnitus (ringing of the ears) What are the different sound colors? - White noise sounds similar to static of an analog TV or radio station that has stopped broadcasting. White noise has equal energy across all sound frequencies. - Brown noise sounds like a powerful waterfall. It has more energy at the lower frequencies and if you have a good speaker system with a subwoofer you should be able to really feel it. - Pink noise's upper sound frequencies don't fall off as fast as they do with brown noise, so you'll get a little more punch. The most interesting thing about pink noise is it's found in almost all electronic devices (known as flicker noise) and even in biological systems. - Blue and violet noise are the opposites of pink and brown noise, respectively, and sound like spraying water from a garden hose. It has more energy at the higher frequencies which means more treble and less bass. - Curious to learn more about color noises? Check out this article for all the details: http://www.tmsoft.com/white-noise-player/ Directions: Drag the Sound Color slider to select brown, pink, white, blue, violet, or somewhere in-between. Next, drag the low and high cut filters to further customize to your liking. Adjust device volume using the on-screen volume slider to a comfortable level. You can also specify to play audio to any AirPlay supported device. Toggle audio playback using the Play/Pause button. Created by the audio experts at TMSOFT that brought you the famous White Noise app. Check out all our apps and sounds at http://www.tmsoft.com/

About

HemiSync

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
Read full description

Explore Audio Frequency Meditation HemiSync is an audio frequency generator that creates binaural beats and isochronic tones for meditation and relaxation practice. The app allows you to experiment with different sound frequencies that some users find helpful for their personal wellness routines. What This App Does: Generates customizable audio tones and beats Offers preset frequency combinations based on popular meditation practices Provides session timers and audio controls Includes binaural beat and isochronic tone generation modes Features: Frequency range selection (Delta, Theta, Alpha, Beta, Gamma) Adjustable beat frequencies and carrier tones Pre-configured audio presets Session timer functionality Solfeggio frequency options (396Hz, 417Hz, 432Hz) Please Note: This app is for entertainment and personal exploration purposes. It generates audio tones based on concepts from audio meditation practices. Any effects experienced are subjective and individual. Privacy Policy - https://enginezero.tech/app-privacy-policy/ Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Noise Generator4 screens
HemiSync4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard8 real differences · 2 level
Noise Generator versus HemiSync: the parameters behind the verdict, then further details
ParameterNoise GeneratorHemiSync
PriceFreeFree
Rating4.7 (2K ratings) — better4.2 (9 ratings)
Positive reviews74.7% of reviews100.0% of reviews — better
Number of ratings2K — better9
Update frequencyFortnightly — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.4
Further details — not scored
Size38 MB61 MB
Age rating4+4+
DeveloperTMSOFTEngineZero

Customer experience

Noise Generator

All ratings1,961 ratings
Positive93.4%
Neutral3.2%
Negative3.4%
Written reviews158 reviews
Positive74.7%
Neutral8.9%
Negative16.5%

HemiSync

All ratings9 ratings
Positive77.8%
Neutral22.2%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Noise Generator

Reported bugs

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

Requested features

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

HemiSync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Noise Generator

No in-app purchases

1 purchases

HemiSync

Subscriptions1
  • Premium$0.991 Month

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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