# Frequency Analyzer vs Belty

The clearest difference is review sentiment: Belty at 100% against Frequency Analyzer's 10%. Belty also leads on in-app purchases (none vs 11) and rating (5.0 vs 4.5). Frequency Analyzer's advantage is ratings volume (182 vs 5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Frequency Analyzer sells 11 in-app purchases, starting at $2.99 per 7 days. Belty asks for nothing beyond the download.

Belty holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Frequency Analyzer has 182 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 10% of Frequency Analyzer's written reviews are positive against 100% of Belty's.

Frequency Analyzer ships an update every 8 days, Belty every 11 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Frequency Analyzer | Belty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (182 ratings)](https://appshunter.io/ios/app/frequency-analyzer/id6468837339/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/belty-belt-tuner/id6789591665/reviews)** |
| Number of ratings | **182** | 5 |
| Positive reviews | 10.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 11 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 35 MB | 1 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Moonbush Games & Utilities App GmbH](https://appshunter.io/developer/1520736594) | [Coby Lai](https://appshunter.io/developer/6789591667) |

## What reviewers say

### Frequency Analyzer

[App page](https://appshunter.io/ios/app/frequency-analyzer/id6468837339)

Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.

**Highlights:** Real-time FFT analysis, Calibrated SPL measurements, 32-bit float audio recording, Synchronized video recording, Spectrogram and octave band analysis, Export WAV, CSV, images, and videos

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Frequency Analyzer Pro Weekly | $2.99 | per 7 days |
| Frequency Analyzer Pro Monthly | $3.99 | per month |
| Frequency Analyzer Pro Monthly | $3.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Annual | $29.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Pro access for lifetime | $89.99 | one-time |


### Belty

[App page](https://appshunter.io/ios/app/belty-belt-tuner/id6789591665)

This app analyzes the frequency of a plucked timing belt to help you tune it accurately. It provides real-time feedback, historical data, and includes calculators for tension and belt length.

**Highlights:** Real-time frequency analysis, Live tuning indicator, Measurement history, Tension calculator, Belt length calculator, On-device processing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Frequency Analyzer free?

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

### Is Belty free?

Belty is free to download, with no in-app purchases.

### Which has better reviews, Frequency Analyzer or Belty?

Belty is rated higher. Frequency Analyzer averages 4.5 out of 5 from 182 ratings, while Belty averages 5.0 from 5 ratings.

### Do Frequency Analyzer or Belty have ads?

Neither Frequency Analyzer nor Belty shows ads.

### Which is updated more often, Frequency Analyzer or Belty?

Frequency Analyzer ships an update every 8 days, and Belty every 11 days. Most recently, Frequency Analyzer was updated on October 27, 2026 and Belty on October 24, 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.*