Comparison

Live Spectrogram vs Frequency Sound Generator App

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

Head to head
About

Live Spectrogram

Visualize sound frequencies in real-time with this tool. It displays audio intensity across time and frequency using color, helping you perfect singing, analyze animal calls, or locate household noises.

Highlights
  • Real-time audio visualization
  • Frequency analysis
  • Time-based spectrum display
  • Intensity shown by color
  • Singing voice perfection
  • Animal call analysis
  • Sound source identification
Features
Read full description

Visualize audio with this handy tool. It displays the frequencies of sound around you over time. The horizontal axis is time, the vertical is frequency, and the intensity of frequencies is shown using pretty shades of red. Use it to: Perfect your singing voice Analyze the call of animals Identify and locate annoying sounds around your house Learn about the world of frequency analysis I hope you enjoy this handy little tool!

About

Frequency Sound Generator App

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

Highlights
  • Frequency range 1Hz to 25,000Hz
  • Wave visualization
  • Adjustable sensitivity
  • Multiple waveforms (Sine, Square, Sawtooth, Triangle)
  • Custom frequency range
  • Logarithmic and Linear slider modes
Features
Read full description

Frequency Sound Generator is a very simply Frequency Generator. It can provide sound frequencies in range from 1Hz to 25,000Hz. To use Frequency Generator, you could swipe your finger up and down to raise or lower the frequency of the tones. The user interface is very simple and clear. You could adjust the frequency up or down exactly in 1Hz with arrow button, and directly check the frequency by professional wave visualization. The human can hear from 20Hz to 20,000HZ, and you can use Frequency Generator to test your hearing. Usage scenarias: 1. Use Frequency Generator to annoy dogs, cats or people. 2. Use this app as dog whistle to train your dog or other pets. 3. Stop your neighbour’s dog from barking by adjusting the sound frequency until it works. 4. Use this app to tease your classmates or friends as a prank tool. 5. Mosquito repellent. Frequency Generator is easy to allow you to generate tones range from 0Hz to Ultrasonic 25kHz frequency. 1. Frequency Slider Scale - Choose between Logarithmic and Linear adjustment modes for precise frequency control 2. Adjustable Sensitivity - Select High, Medium, or Low sensitivity to match your preference for slider responsiveness 3. Multiple Waveforms - Generate different sound types including Sine, Square, Sawtooth, and Triangle waves 4. Custom Frequency Range - Set your preferred frequency range from 1 Hz to 25,000 Hz for personalized sound generation 5. Enhanced Settings - Intuitive settings interface for easy customization of all tone generation parameters Subscription Information : Frequency Sound Generator App offers an auto-renewing yearly subscription at $19.99 USD/year and auto-renewing weekly subscription at $5.99 USD/week to provide you with unlimited access to all premium features while you maintain an active subscription. Payment will be charged to the payment method connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after purchase. Terms of service: http://fireappspro.com/tone/frequency_terms_of_use.html Privacy policy: http://www.fireappspro.com/#portfolio Please get in touch if you have any problems via email.

Screenshots

Live Spectrogram4 screens
Frequency Sound Generator App4 screens

Verdict

The call

The clearest difference is price: Frequency Sound Generator App at Free against Live Spectrogram's $1.99. Frequency Sound Generator App also leads on update cadence (every 2 months vs every 31 months) and ratings volume (4.8K vs 6). Live Spectrogram's advantage is in-app purchases (none vs 2) and ads (none vs shown). On review sentiment 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 Sound Generator App is free to download; Live Spectrogram costs $1.99 up front. Frequency Sound Generator App sells 2 in-app purchases, starting at $5.99 per 7 days. Live Spectrogram asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Live Spectrogram holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Frequency Sound Generator App has 4.8K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 63% of Live Spectrogram's written reviews are positive against 66% of Frequency Sound Generator App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Live Spectrogram ships an update every 31 months, Frequency Sound Generator App every 2 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

Scorecard8 real differences · 2 level
Live Spectrogram versus Frequency Sound Generator App: the parameters behind the verdict, then further details
ParameterLive SpectrogramFrequency Sound Generator App
Price$1.99Free — better
Rating4.8 (6 ratings) — better4.5 (4.8K ratings)
Positive reviews62.5% of reviews66.3% of reviews — better
Number of ratings64.8K — better
Update frequencyEvery 31 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size15 MB36 MB
Age rating4+4+
DeveloperKrueger Systems, Inc.Min Ku

Customer experience

Live Spectrogram

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

Frequency Sound Generator App

All ratings4,761 ratings
Positive87.0%
Neutral4.4%
Negative8.6%
Written reviews564 reviews
Positive66.3%
Neutral7.6%
Negative26.1%

Bugs and requests

Live Spectrogram

Not enough reviews yet to summarise bugs or requests.

Frequency Sound Generator App

Reported bugs

3 issues
  • Frequency slider is overly sensitive
  • Displayed frequency doesn't match actual output
  • Inconsistent behavior between 'Play' and 'Mode' buttons

Requested features

4 requests
  • Option to save favorite frequencies
  • Ability to type in specific frequency values
  • Background playback support
  • Paid ad-free version

In-app purchases

None

Live Spectrogram

No in-app purchases

2 purchases

Frequency Sound Generator App

Subscriptions2
  • Unlimited Access Weekly Plan$5.997 Days
  • Unlimited Access Yearly Plan$19.991 Year

Questions

Is Live Spectrogram free?
Live Spectrogram costs $1.99, with no in-app purchases.
Is Frequency Sound Generator App free?
Frequency Sound Generator App is free to download, with in-app purchases available.
Which has better reviews, Live Spectrogram or Frequency Sound Generator App?
Live Spectrogram is rated higher. Live Spectrogram averages 4.8 out of 5 from 6 ratings, while Frequency Sound Generator App averages 4.5 from 4.8K ratings.
Do Live Spectrogram or Frequency Sound Generator App have ads?
Frequency Sound Generator App shows ads; Live Spectrogram does not.
Which is updated more often, Live Spectrogram or Frequency Sound Generator App?
Live Spectrogram ships an update every 31 months, and Frequency Sound Generator App every 2 months. Most recently, Live Spectrogram was updated on October 14, 2026 and Frequency Sound Generator App on October 19, 2026.

Other comparisons