# Low Frequency Detector vs Code Rain Clock

The clearest difference is price: Code Rain Clock at $0.99 against Low Frequency Detector's $9.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Low Frequency Detector costs $9.99 and Code Rain Clock $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Low Frequency Detector ships an update every 9 months, Code Rain Clock every 6 months. The most recent releases landed on October 6, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | Code Rain Clock |
| --- | --- | --- |
| Price | $9.99 | **$0.99** |
| 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 6 months** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | 26.2 | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [kohei yamane](https://appshunter.io/developer/1239055575) |

## 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


### Code Rain Clock

[App page](https://appshunter.io/ios/app/code-rain-clock/id6758747018)

**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 Code Rain Clock free?

Code Rain Clock costs $0.99, with no in-app purchases.

### Do Low Frequency Detector or Code Rain Clock have ads?

Neither Low Frequency Detector nor Code Rain Clock shows ads.

### Which is updated more often, Low Frequency Detector or Code Rain Clock?

Low Frequency Detector ships an update every 9 months, and Code Rain Clock every 6 months. Most recently, Low Frequency Detector was updated on October 6, 2026 and Code Rain Clock on September 26, 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.*