# Low Frequency Detector vs GLTFonline

The clearest difference is price: GLTFonline at Free against Low Frequency Detector's $9.99. GLTFonline also leads on update cadence (every 2 months vs every 9 months) and device support (3 vs 1). On ads and in-app purchases there is nothing between them.

GLTFonline is free to download; Low Frequency Detector costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Low Frequency Detector ships an update every 9 months, GLTFonline every 2 months. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | GLTFonline |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[2.8 (6 ratings)](https://appshunter.io/ios/app/low-frequency-detector/id1196584147/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 32 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [Isiplus Electronique](https://appshunter.io/developer/1896299961) |

## What reviewers say

### Low Frequency Detector

[App page](https://appshunter.io/ios/app/low-frequency-detector/id1196584147)

This tool measures and analyzes low-frequency sounds that are difficult for the human ear to detect. It helps identify potential noise pollution from sources like construction or factories, providing detailed reports on frequency components and sound levels.

**Highlights:** Low-frequency power level measurement (<100Hz), Audible band power level measurement (Leq), 1/3 octave band analysis (OCT), FFT analysis (FFT), Time course graph (TIME), Measurement report generation, Calibration function

**In-app purchases:** none


### GLTFonline

[App page](https://appshunter.io/ios/app/gltfonline/id6766531595)

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

**In-app purchases:** none


## Frequently asked questions

### Is Low Frequency Detector free?

Low Frequency Detector costs $9.99, with no in-app purchases.

### Is GLTFonline free?

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

### Do Low Frequency Detector or GLTFonline have ads?

Neither Low Frequency Detector nor GLTFonline shows ads.

### Which is updated more often, Low Frequency Detector or GLTFonline?

Low Frequency Detector ships an update every 9 months, and GLTFonline every 2 months. Most recently, Low Frequency Detector was updated on October 6, 2026 and GLTFonline 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.*