Comparison

Audio Spectrum Analyzer vs Frequency

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

Head to head
About

Audio Spectrum Analyzer

Transform your iOS device into a powerful audio spectrum analyzer. Visualize frequencies up to 20 kHz with customizable display options including frequency span, FFT size, and logarithmic views. Enhance analysis with filtering, peak hold, and adjustable decay rates.

Highlights
  • Frequency analysis up to 20 kHz
  • Adjustable frequency span and FFT size
  • Logarithmic frequency display
  • Graph fill mode toggle
  • Up to five frequency markers
  • Spectrum filtering and averaging
  • Peak hold with adjustable decay rate
Features
Read full description

Spectrum Pad turns your iPad, iPhone, or iPod Touch into an audio spectrum analyzer. Frequencies up to 20 kHz can be displayed. You can control the displayed frequency span, as well as the FFT size, from 1024 to 262144 bins. A logarithmic display of the entire 10 Hz to 20 kHz frequency range is available, and the graph fill mode can be turned on and off, as well as the display of up to five frequency markers. Filtering (averaging) can be applied to the spectrum, to smooth out variations. You can turn on the Peak Hold to make it easier to see transient events, as well as adjust the decay rate. Swiping with two fingers lets you adjust the brightness of the spectrum or the graticule grid overlay. Tapping three times with two fingers will save a screenshot to your Photos. One of several user selectable window functions can be used: Rectangular Hanning Hamming Tukey Cosine Lanczos Blackman

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.

Screenshots

Audio Spectrum Analyzer4 screens
Frequency3 screens

Verdict

The call

The clearest difference is price: Frequency at Free against Audio Spectrum Analyzer's $3.99. Frequency also leads on rating (4.7 vs 3.9) and update cadence (fortnightly vs every 7 months). Audio Spectrum Analyzer's advantage is ads (none vs shown) and iOS requirement (6.0 vs 16.0). On in-app purchases 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

Frequency is free to download; Audio Spectrum Analyzer costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Frequency holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Frequency has 340 ratings behind it against 52, so its average is the more settled of the two. Written reviews point the same way: 54% of Audio Spectrum Analyzer's written reviews are positive against 73% of Frequency's.

UpkeepUpdate frequency

Audio Spectrum Analyzer ships an update every 7 months, Frequency fortnightly. Both last shipped on October 14, 2026.

Scorecard8 real differences · 2 level
Audio Spectrum Analyzer versus Frequency: the parameters behind the verdict, then further details
ParameterAudio Spectrum AnalyzerFrequency
Price$3.99Free — better
Rating3.9 (52 ratings)4.7 (340 ratings) — better
Positive reviews54.4% of reviews72.7% of reviews — better
Number of ratings52340 — better
Update frequencyEvery 7 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better16.0
Further details — not scored
Size1 MB8 MB
Age rating4+4+
DeveloperBlack Cat SystemsLucija Jaksic

Customer experience

Audio Spectrum Analyzer

All ratings52 ratings
Positive69.2%
Neutral9.6%
Negative21.2%
Written reviews68 reviews
Positive54.4%
Neutral10.3%
Negative35.3%

Frequency

All ratings338 ratings
Positive93.5%
Neutral3.3%
Negative3.3%
Written reviews66 reviews
Positive72.7%
Neutral4.5%
Negative22.7%

User reviews

Audio Spectrum Analyzer

From 52 App Store ratings

What we love

  • 👍 Handy for recording studio
  • 👍 Excellent for analyzing noise
  • 👍 Intuitive and simple
  • 👍 Great for tuning
  • 👍 Accurate on iPad mini

Room to improve

  • 👎 Does not work with newer iPhones
  • 👎 Not updated in years
  • 👎 Stopped working quickly
  • 👎 Sold with false pretenses
  • 👎 Extremely slow on iPhone 7

Frequency

From 340 App Store ratings

What we love

  • 👍 Simple and easy to use interface
  • 🎵 Accurate frequency generation
  • 💰 Free application
  • 🧘 Helpful for meditation and stress relief
  • 🔧 Multiple waveform options (sine, square, triangular, sawtooth)

Room to improve

  • 📢 Intrusive and inappropriate advertisements
  • 🔊 Potential audio damage to speakers/hearing
  • 🔒 Privacy concerns and data collection issues
  • 📱 UI elements off-screen on compact devices
  • 🎚️ Difficult frequency selection with slider

Bugs and requests

Audio Spectrum Analyzer

Reported bugs

14 issues
  • No way to exit on iPhones without Home button
  • Doesn't work with iPhone XR
  • Stopped working after about 3 minutes
  • Zooming sometimes doesn't work
  • Resuming app makes it not display frequency data
Show 9 more
  • Cannot pinch to zoom in frequency domain
  • Peak hold feature is unnecessary/freezes
  • Graph disappears
  • Screen update is slow
  • White screen only on iPad 1
  • Vertical volume scale incorrect
  • Laggy controls
  • Cannot see entered text
  • Fatal, doesn't work, jerky

Requested features

19 requests
  • Running average of spectrums
  • Ability to exit on iPhones without Home button
  • Ability to reset peak hold with a tap
  • Go to 40 kHz
  • Expand instructions for filtering window
Show 14 more
  • Zoom on Y axis (amplitude)
  • Freeze spectrum and save/email
  • Isolate portions of the spectrum
  • Apple Watch port
  • More detailed grid
  • Linear vertical axis
  • More control over FFT parameters
  • Waterfall display
  • Sliding cursor/zoom window
  • Manually place markers
  • Pause, peak hold, save functions
  • Waterfall view
  • Configurable averaging
  • More functions

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

In-app purchases

None

Audio Spectrum Analyzer

No in-app purchases

None

Frequency

No in-app purchases

Questions

Is Audio Spectrum Analyzer free?
Audio Spectrum Analyzer costs $3.99, with no in-app purchases.
Is Frequency free?
Frequency is free to download, with no in-app purchases.
Which has better reviews, Audio Spectrum Analyzer or Frequency?
Frequency is rated higher. Audio Spectrum Analyzer averages 3.9 out of 5 from 52 ratings, while Frequency averages 4.7 from 340 ratings.
Do Audio Spectrum Analyzer or Frequency have ads?
Frequency shows ads; Audio Spectrum Analyzer does not.
Which is updated more often, Audio Spectrum Analyzer or Frequency?
Audio Spectrum Analyzer ships an update every 7 months, and Frequency fortnightly. Most recently, Audio Spectrum Analyzer was updated on October 14, 2026 and Frequency on October 14, 2026.

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