# Resonance vs Spectrum Analyzer+ Audio FFT

The clearest difference is rating: Resonance at 5.0 against Spectrum Analyzer+ Audio FFT's 2.3. Resonance also leads on ads (none vs shown) and device support (3 vs 1). Spectrum Analyzer+ Audio FFT's advantage is in-app purchases (none vs 3) and update cadence (weekly vs every 4 months). On price there is nothing between them.

Both are free to download. Resonance sells 3 in-app purchases, starting at $1.99 per month. Spectrum Analyzer+ Audio FFT asks for nothing beyond the download.

Resonance holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Resonance ships an update every 4 months, Spectrum Analyzer+ Audio FFT weekly. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Resonance | Spectrum Analyzer+ Audio FFT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/resonance/id6654889672/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-plus-audio-fft/id6760830858/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 70 MB | 69 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Benjamin Probett](https://appshunter.io/developer/1561394321) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### Resonance

[App page](https://appshunter.io/ios/app/resonance/id6654889672)

Transform your smartphone into a professional vibration analysis tool. Measure, record, and analyze vibrations in real-time with spectral analysis, on-site and quickly. Supports external Bluetooth sensors and offers powerful analysis tools for various applications.

**Highlights:** Real-time spectral analysis, Power Spectral Density (PSD) and FFT, Bluetooth sensor support, Damping ratio estimation, Export data as CSV, Generate PDF reports

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Subscription | $1.99 | per month |
| Yearly Premium Subscription | $6.99 | per year |
| Lifetime Access - Pro Features | $6.99 | one-time |


### 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 Resonance free?

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

### Is Spectrum Analyzer+ Audio FFT free?

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

### Which has better reviews, Resonance or Spectrum Analyzer+ Audio FFT?

Resonance is rated higher. Resonance averages 5.0 out of 5 from 1 ratings, while Spectrum Analyzer+ Audio FFT averages 2.3 from 3 ratings.

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

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

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

Resonance ships an update every 4 months, and Spectrum Analyzer+ Audio FFT weekly. Most recently, Resonance was updated on October 10, 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.*