# Sound Level & Spectrogram vs Spectrum Analyzer+ Audio FFT

The clearest difference is update cadence: Spectrum Analyzer+ Audio FFT at weekly against Sound Level & Spectrogram's every 5 months. On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sound Level & Spectrogram ships an update every 5 months, Spectrum Analyzer+ Audio FFT weekly. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Sound Level & Spectrogram | Spectrum Analyzer+ Audio FFT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Ad-supported | Ad-supported |
| Size | 4 MB | 69 MB |
| Requires iOS | 18.7 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


### Spectrum Analyzer+ Audio FFT

[App page](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858)

This utility transforms your device into a real-time audio frequency analyzer. It visualizes sound frequencies from 20 Hz to 20 kHz using the microphone, displaying amplitude and peak frequencies. It's designed for musicians, audio engineers, and sound enthusiasts.

**Highlights:** Real-time FFT audio spectrum visualization, Frequency range 20 Hz to 20 kHz, Peak frequency detection, Average dB level per band, Adjustable dB range, Dark theme

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Is Spectrum Analyzer+ Audio FFT free?

Spectrum Analyzer+ Audio FFT is free to download, with no in-app purchases.

### Do Sound Level & Spectrogram or Spectrum Analyzer+ Audio FFT have ads?

Both Sound Level & Spectrogram and Spectrum Analyzer+ Audio FFT show ads.

### Which is updated more often, Sound Level & Spectrogram or Spectrum Analyzer+ Audio FFT?

Sound Level & Spectrogram ships an update every 5 months, and Spectrum Analyzer+ Audio FFT weekly. Most recently, Sound Level & Spectrogram was updated on October 6, 2026 and Spectrum Analyzer+ Audio FFT on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*