# SpectrumView vs Detector.

The clearest difference is review sentiment: SpectrumView at 63% against Detector.'s 0%. SpectrumView also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). Detector.'s advantage is update cadence (weekly vs every 10 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. SpectrumView sells 7 one-off in-app purchases 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.

SpectrumView ships an update every 10 months, Detector. weekly. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | SpectrumView | Detector. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (74 ratings)](https://appshunter.io/ios/app/spectrumview/id472662922/reviews)** | — |
| Number of ratings | **74** | — |
| Positive reviews | **62.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 17 MB | 176 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oxford Wave Research Ltd.](https://appshunter.io/developer/472662925) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### SpectrumView

[App page](https://appshunter.io/ios/app/spectrumview/id472662922)

This app provides real-time audio analysis with a dynamic spectrogram and spectrum analyzer. Visualize audible and inaudible frequencies, measure tones, get feedback on speech, identify sounds, and calibrate instruments. Access recordings and snapshots easily.

**Highlights:** Real-time spectrogram and spectrum analyzer, Configurable sample rate and frequency resolution, Record, pause, and playback audio files, Generate snapshots of spectrum data, Web file transfer, Tap data cursor for precise frequency and level, Musical notes or frequency display on tap

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Enable peak hold | $0.99 | one-time |
| Access iTunes and SoundCould | $0.99 | one-time |
| Generate data snapshot | $0.99 | one-time |
| Enable Log Scale | $1.99 | one-time |
| Disable recording length limit | $1.99 | one-time |
| Enable pinch to zoom | $1.99 | one-time |
| Enable Web File Transfer | $1.99 | one-time |

**What reviewers like**

- 👍 Accurate and reliable spectrogram visualization
- 🎯 Highly configurable FFT and sampling settings
- 🎨 Beautiful and intuitive user interface
- 📊 Excellent for analyzing speech, music, and animal sounds
- ⚙️ Useful for professional audio calibration and research

**What reviewers complain about**

- 💰 Aggressive in-app purchase model for basic features
- 🔐 Unexplained location permission requests
- 📉 Linear frequency scale wastes screen space
- ⏱️ Slow app startup times
- 🎯 Limited frequency range (8kHz cap in recent versions)

**Reported bugs**

- App crashes on startup after updates
- Crashes when attempting to zoom on spectrograms
- Crashes when playing files from iTunes library
- Microphone hijacking error messages
- Pinch-to-zoom and pan features not functioning properly

**Requested features**

- Logarithmic frequency scale for audio analysis
- Adjustable time scale/window for spectrograms
- Ability to analyze audio from music library/iTunes
- Longer-term averaging for spectrum analyzer
- A-weighting frequency selection


### 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 SpectrumView free?

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

### Is Detector. free?

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

### Do SpectrumView or Detector. have ads?

Detector. shows ads; SpectrumView does not.

### Which is updated more often, SpectrumView or Detector.?

SpectrumView ships an update every 10 months, and Detector. weekly. Most recently, SpectrumView was updated on October 9, 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.*