# Spectrum Analyzer+ Audio FFT vs Frequency Analyzer

The clearest difference is in-app purchases: Spectrum Analyzer+ Audio FFT at none against Frequency Analyzer's 2. Spectrum Analyzer+ Audio FFT also leads on update cadence (weekly vs fortnightly). Frequency Analyzer's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Frequency Analyzer sells 2 in-app purchases, starting at $4.99 per 7 days. Spectrum Analyzer+ Audio FFT asks for nothing beyond the download.

Spectrum Analyzer+ Audio FFT ships an update weekly, Frequency Analyzer fortnightly. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Spectrum Analyzer+ Audio FFT | Frequency Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Ad-supported | — |
| Size | 69 MB | 9 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) | [Ertugrul Sari](https://appshunter.io/developer/1802366246) |

## What reviewers say

### 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


### Frequency Analyzer

[App page](https://appshunter.io/ios/app/frequency-analyzer-db-meter/id6770267924)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Lifetime Access | $19.99 | one-time |


## Frequently asked questions

### Is Spectrum Analyzer+ Audio FFT free?

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

### Is Frequency Analyzer free?

Frequency Analyzer is free to download, with in-app purchases available.

### Do Spectrum Analyzer+ Audio FFT or Frequency Analyzer have ads?

Spectrum Analyzer+ Audio FFT shows ads; Frequency Analyzer does not.

### Which is updated more often, Spectrum Analyzer+ Audio FFT or Frequency Analyzer?

Spectrum Analyzer+ Audio FFT ships an update weekly, and Frequency Analyzer fortnightly. Most recently, Spectrum Analyzer+ Audio FFT was updated on October 3, 2026 and Frequency Analyzer on October 10, 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.*