Comparison

Frequency vs HemiSync

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

Head to head
About

Frequency

Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.

Highlights
  • Generate sine, square, sawtooth, triangle waves
  • Adjustable frequency (1Hz-22000Hz)
  • Animated sound wave visualization
  • Volume control (0-100%)
  • Note selection
  • Speaker cleaning function
Features
Read full description

Are you producing? Want to sound test your speakers or tune your instruments? Or simply, do you want to generate sounds and listen to the generated sounds in different frequencies? Well, then you need a frequency sound generator to produce sound waves in different frequencies. Introducing Frequency Sound Generator! Frequency: Generator Sound player lets you generate a sine, square, sawtooth or triangle sound wave with a frequency between 1Hz and 22000Hz (Hertz). It produces accurate tone & soundwaves while being simple and easy to use. Additionally, pick from a wide variety of notes by taping the notes icon. No matter if you need to sound test and generate high frequency sounds or low frequency sounds, our frequency tone generator is your #1 best solution. EASY CONTROL Frequency: Sound Generator allows you to easily change the soundwaves from the main menu. Simply tap on the sound wave icon and pick between sine, square, sawtooth or triangle. ANIMATED SOUND WAVE You’ll love the animated sound wave function which visually represents the sound for a given frequency. You can change waveform by clicking on a round button at the left side and get a different sound and animated wave. ADJUST FREQUENCY & VOLUME Adjust the sound generating frequency easily by dragging the yellow dot. Make use of the - & + buttons for added adjusting precision. Additionally, control the volume of the generated sounds from 0-100%. NUMEROUS USES: This sound generating app can be used in multiple use cases: - Test your hearing. A human being is capable of hearing frequencies in the average range of 20Hz-20000Hz. This range is getting smaller by age, so it’s interesting to sound test your hearing capabilities. - Test speakers and headphones for the high end (treble) and low end (bass) tones. - Use this app as an instrument tuner when playing or producing. - Cleaning water from the speaker. Since sound is making small vibrations it can help to shake off unwanted water from your speakers. - Find your tinnitus frequency. NOTE: Since mobile phones are not high-quality audio sources and in-built speakers may vary in quality, sometimes users can hear sounds at very low or high frequencies even beyond the scope of human hearing. That noise is not sound of a given frequency but static or “parasite” noise generated by your mobile device. For the best experience use a pair of good quality headphones.

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

Frequency3 screens
HemiSync4 screens

Verdict

The call

The clearest difference is rating: Frequency at 4.7 against HemiSync's 4.2. Frequency also leads on in-app purchases (none vs 1) and ratings volume (340 vs 9). HemiSync's advantage is ads (none vs shown) and review sentiment (100% vs 70%). On price, monetization model and device support 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. Frequency asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Frequency holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Frequency has 340 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 70% of Frequency'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

Frequency ships an update fortnightly, HemiSync every 5 weeks. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

Scorecard7 real differences · 3 level
Frequency versus HemiSync: the parameters behind the verdict, then further details
ParameterFrequencyHemiSync
PriceFreeFree
Rating4.7 (340 ratings) — better4.2 (9 ratings)
Positive reviews69.6% of reviews100.0% of reviews — better
Number of ratings340 — better9
Update frequencyFortnightly — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better18.4
Further details — not scored
Size8 MB61 MB
Age rating4+4+
DeveloperLucija JaksicEngineZero

Customer experience

Frequency

All ratings338 ratings
Positive93.5%
Neutral3.3%
Negative3.3%
Written reviews46 reviews
Positive69.6%
Neutral4.3%
Negative26.1%

HemiSync

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

Bugs and requests

Frequency

Reported bugs

4 issues
  • Slider snaps to certain numbers, skipping decimals
  • Missing specific frequencies (431Hz, 432Hz, 128Hz)
  • Settings/controls off-screen on smaller devices
  • App crashes when switching between applications

Requested features

9 requests
  • Manual text input for precise frequency selection
  • Ad-free paid version option
  • Timer feature for sessions
  • Digital tuning with +/- buttons on main screen
  • Background image customization or frequency healing chart
Show 4 more
  • Decimal frequency support
  • Increased decibel/amplification levels
  • Language localization (Turkish requested)
  • Continuous background play without app switching interruption

HemiSync

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Frequency

No in-app purchases

1 purchases

HemiSync

Subscriptions1
  • Premium$0.991 Month

Questions

Is Frequency free?
Frequency 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, Frequency or HemiSync?
Frequency is rated higher. Frequency averages 4.7 out of 5 from 340 ratings, while HemiSync averages 4.2 from 9 ratings.
Do Frequency or HemiSync have ads?
Frequency shows ads; HemiSync does not.
Which is updated more often, Frequency or HemiSync?
Frequency ships an update fortnightly, and HemiSync every 5 weeks. Most recently, Frequency was updated on October 10, 2026 and HemiSync on September 29, 2026.

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