# Low Frequency Detector vs ShadowVision

The clearest difference is review sentiment: ShadowVision at 100% against Low Frequency Detector's 50%. ShadowVision also leads on update cadence (every 3 days vs every 9 months) and device support (3 vs 1). Low Frequency Detector's advantage is price ($9.99 vs $19.99). On ads, in-app purchases and monetization model there is nothing between them.

Low Frequency Detector costs $9.99 and ShadowVision $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Low Frequency Detector ships an update every 9 months, ShadowVision every 3 days. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Low Frequency Detector | ShadowVision |
| --- | --- | --- |
| Price | **$9.99** | $19.99 |
| 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 | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 1 MB | 2 MB |
| Requires iOS | 26.2 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOON,LLC](https://appshunter.io/developer/633948723) | [MONOPOLEAPPS K.K.](https://appshunter.io/developer/925904164) |

## 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


### ShadowVision

[App page](https://appshunter.io/ios/app/shadowvision-fix-dark-photo/id6742903807)

This utility app sharpens blurry images and brightens dark photos, improving visibility for everyday pictures and security footage. It focuses on enhancing detail and clarity without increasing resolution.

**Highlights:** Sharpen blurry images, Brighten dark photos, Enhance detail, Improve visibility, Correct focus

**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 ShadowVision free?

ShadowVision costs $19.99, with no in-app purchases.

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

Neither Low Frequency Detector nor ShadowVision shows ads.

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

Low Frequency Detector ships an update every 9 months, and ShadowVision every 3 days. Most recently, Low Frequency Detector was updated on November 2, 2026 and ShadowVision on October 30, 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.*