# Noise Spectrum Logger vs Detector.

The clearest difference is ads: Noise Spectrum Logger at none against Detector.'s shown. Noise Spectrum Logger also leads on monetization model (free vs free with in-app purchases). Detector.'s advantage is update cadence (weekly vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Noise Spectrum Logger sells 1 one-off in-app purchase and Detector. sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Noise Spectrum Logger ships an update every 10 months, Detector. weekly. The most recent releases landed on November 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Noise Spectrum Logger | Detector. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/noise-spectrum-logger/id1153920486/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 176 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Yukiko Iwai](https://appshunter.io/developer/965630131) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Noise Spectrum Logger

[App page](https://appshunter.io/ios/app/noise-spectrum-logger/id1153920486)

Visualize sound frequencies in real-time with a dynamic spectrum display. Log and export audio data for analysis, with options for smoothing and background processing. Access all features offline.

**Highlights:** Real-time spectrum display (20-20000Hz), Zoomable spectrum view, Maximum value highlighting, Spectrum smoothing options (Mean/RMS), Logging and CSV export, Background processing, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### Detector.

[App page](https://appshunter.io/ios/app/detector/id6758643348)

This app uses your phone's sensors to scan for hidden signals, wireless activity, and environmental anomalies. It helps inspect spaces for suspicious devices and provides detailed reports for privacy and security analysis. Features include room mapping, risk assessment, and device diagnostics.

**Highlights:** Hidden signal scanning, Device analysis, Room mapping, Risk assessment, Detailed reporting, Environmental anomaly detection, Offline mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| detector_by_oliva_subscription | $1.99 | per month |
| detector_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is Noise Spectrum Logger free?

Noise Spectrum Logger is free to download, with in-app purchases available.

### Is Detector. free?

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

### Do Noise Spectrum Logger or Detector. have ads?

Detector. shows ads; Noise Spectrum Logger does not.

### Which is updated more often, Noise Spectrum Logger or Detector.?

Noise Spectrum Logger ships an update every 10 months, and Detector. weekly. Most recently, Noise Spectrum Logger was updated on November 2, 2026 and Detector. on October 3, 2026.

---

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