# Frequency Detector Analyzer vs Frequency Counter+ Hz FFT

The clearest difference is rating: Frequency Detector Analyzer at 4.5 against Frequency Counter+ Hz FFT's 3.3. Frequency Detector Analyzer also leads on ads (none vs shown) and device support (3 vs 1). Frequency Counter+ Hz FFT's advantage is in-app purchases (none vs 2) and update cadence (every 4 days vs every 2 months). On price, review sentiment and ratings volume there is nothing between them.

Both are free to download. Frequency Detector Analyzer sells 2 in-app purchases, starting at $8.99 per 7 days. Frequency Counter+ Hz FFT asks for nothing beyond the download.

Frequency Detector Analyzer holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Frequency Detector Analyzer ships an update every 2 months, Frequency Counter+ Hz FFT every 4 days. The most recent releases landed on September 17, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Frequency Detector Analyzer | Frequency Counter+ Hz FFT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (17 ratings)](https://appshunter.io/ios/app/frequency-detector-analyzer/id6752298079/reviews)** | [3.3 (6 ratings)](https://appshunter.io/ios/app/frequency-counter-plus-hz-fft/id6761234058/reviews) |
| Number of ratings | **17** | 6 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 65 MB | 69 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [NEURASYNC](https://appshunter.io/developer/1639101560) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### Frequency Detector Analyzer

[App page](https://appshunter.io/ios/app/frequency-detector-analyzer/id6752298079)

This application transforms your device into a precise sound analysis tool. It offers real-time frequency detection, visualization, and data logging for musicians, engineers, and curious individuals. Gain clarity and accuracy in understanding the soundscape around you.

**Highlights:** Live frequency tuner, Spectrogram visualization, Automatic logging and CSV export, Customizable logging interval, Elegant and modern design, Reliable performance

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Frequency Detector Weekly Sub | $8.99 | per 7 days |
| Frequency Detector Lifetime | $29.99 | one-time |


### Frequency Counter+ Hz FFT

[App page](https://appshunter.io/ios/app/frequency-counter-plus-hz-fft/id6761234058)

This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.

**Highlights:** Dominant frequency measurement (Hz), Instrument tuning with note and pitch display, Motor RPM analysis, 50/60 Hz mains hum detection, Measurement history and trend charts, CSV export of measurements

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

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Detector Analyzer free?

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

### Is Frequency Counter+ Hz FFT free?

Frequency Counter+ Hz FFT is free to download, with no in-app purchases.

### Which has better reviews, Frequency Detector Analyzer or Frequency Counter+ Hz FFT?

Frequency Detector Analyzer is rated higher. Frequency Detector Analyzer averages 4.5 out of 5 from 17 ratings, while Frequency Counter+ Hz FFT averages 3.3 from 6 ratings.

### Do Frequency Detector Analyzer or Frequency Counter+ Hz FFT have ads?

Frequency Counter+ Hz FFT shows ads; Frequency Detector Analyzer does not.

### Which is updated more often, Frequency Detector Analyzer or Frequency Counter+ Hz FFT?

Frequency Detector Analyzer ships an update every 2 months, and Frequency Counter+ Hz FFT every 4 days. Most recently, Frequency Detector Analyzer was updated on September 17, 2026 and Frequency Counter+ Hz FFT on August 31, 2026.

---

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