Comparison

Audio Frequency Analyzer vs nezu 3

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

Head to head
About

Audio Frequency Analyzer

This real-time audio analyzer measures and evaluates sound environments with 1/3 octave band frequency response and FFT analysis. It supports calibration for high accuracy and is suitable for various audio testing and tuning applications.

Highlights
  • Real-time frequency spectrum response measurement (1/3 octave, 30 bands)
  • FFT Analyzer
  • Observation frequency range: 20 - 23000 Hz
  • Calibration function for high accuracy
  • Supports built-in and external microphones
  • Snapshot and averaging functions
Read full description

"Audio Frequency Analyzer" is a powerful real-time audio analyzer (RTA) app for iPhone. With its simple operation, you can easily measure and evaluate your sound environment. This app measures the frequency response in 30 split band scale of 1/3 octave in real time. It can also display the FFT analysis results. It supports calibration for 1/3-octave bands. By adjusting the characteristics to match not only the built-in microphone but also your external microphone, it achieves high measurement accuracy. "Audio Frequency Analyzer" can be used for various applications, including sound room tuning, speaker settings, audio equipment testing, stage setup measurement, sound mixing environment evaluation and noise environment investigation. Features: - Frequency spectrum response measurement of 1/3 octave unit, 30 bands. (OCT) - FFT Analyzer (FFT) - Observation frequency range: 20 - 23000 Hz - Logarithmic amplitude display. - Touch-scroll function to adjust visible amplitude ranges. - Display the measured value of 1/3 oct bands at OCT mode. (dB@OCT) - Function to change the graph slope at FFT mode. (Slope): -3dB/oct (less than 1kHz), +3dB/oct (1kHz or higher) - Peak hold function. (Hold) - Average display function. (Avg): Time linear averaging. Fast-2.56sec, Slow-12.8 sec - Display response control. (Fast/Slow) - Reset of Measurement display position. (Scroll) - Snapshot of Measurement display. (Snap) - Calibration function in OCT mode. (Calibrate): 1/3 octave band offset and total offset setting. - Supports built-in microphone, headset microphone, and external digital audio connection. Note: The first time you access your microphone and photos after installing the app, the iOS system will ask you for permission to access them. If you have not enabled this setting, the app will not be able to access them due to iOS system privacy restrictions. Please enable the access permission in the iOS setting "Settings > Privacy & Security > Photos or Microphone". Please visit our iOS app support page for more information about this app.

About

nezu 3

Control your Vibone nezu 3 device via Bluetooth to switch between hearing and audio modes. Adjust volume, noise reduction, and customize sound profiles with six frequency bands for a personalized listening experience.

Highlights
  • Bluetooth device connection
  • Switch hearing/Bluetooth modes
  • Adjust left/right earphone volume
  • Adjust noise reduction
  • Customize sound profiles
  • Six-band frequency adjustment
Features
Read full description

Features You can connect the Vibone nezu 3 to devices such as smartphones via Bluetooth and switch or adjust the following settings: 1.Switch between hearing mode and Bluetooth mode 2.Adjust the volume for each earphone (left and right) 3.Adjust the noise reduction function 4.Adjust the sound quality 5.Particularly for sound quality, in addition to the three preset sound profiles in Vibone nezu 3, you can customize the sound by adjusting six levels for each frequency band, allowing you to create your preferred sound profile. How to Use Please refer to the instruction video provided by Solid Sonic Co., Ltd., before using the device.

Screenshots

Audio Frequency Analyzer4 screens
nezu 34 screens

Verdict

The call

The clearest difference is price: nezu 3 at Free against Audio Frequency Analyzer's $9.99. nezu 3 also leads on iOS requirement (12.0 vs 26.2). Audio Frequency Analyzer's advantage is review sentiment (60% vs 50%). On update cadence, ads, 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

nezu 3 is free to download; Audio Frequency Analyzer costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Audio Frequency Analyzer ships an update every 8 months, nezu 3 every 7 months. The most recent releases landed on September 9, 2026 and September 3, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Frequency Analyzer versus nezu 3: the parameters behind the verdict, then further details
ParameterAudio Frequency Analyzernezu 3
Price$9.99Free — better
Rating3.7 (3 ratings) — better—
Positive reviews60.0% of reviews — better50.0% of reviews
Number of ratings3 — better—
Update frequencyEvery 8 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPod — better
Requires iOS26.212.0 — better
Further details — not scored
Size0 MB25 MB
Age rating4+4+
DeveloperTOON,LLCSOLID SONIC K.K.

Customer experience

Audio Frequency Analyzer

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews10 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

nezu 3

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Audio Frequency Analyzer

No in-app purchases

None

nezu 3

No in-app purchases

Questions

Is Audio Frequency Analyzer free?
Audio Frequency Analyzer costs $9.99, with no in-app purchases.
Is nezu 3 free?
nezu 3 is free to download, with no in-app purchases.
Do Audio Frequency Analyzer or nezu 3 have ads?
Neither Audio Frequency Analyzer nor nezu 3 shows ads.
Which is updated more often, Audio Frequency Analyzer or nezu 3?
Audio Frequency Analyzer ships an update every 8 months, and nezu 3 every 7 months. Most recently, Audio Frequency Analyzer was updated on September 9, 2026 and nezu 3 on September 3, 2026.

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