# Ultrasonic Analyzer vs Spectrum Analyzer

The clearest difference is review sentiment: Ultrasonic Analyzer at 57% against Spectrum Analyzer's 5%. Ultrasonic Analyzer also leads on in-app purchases (none vs 13) and ads (none vs shown). Spectrum Analyzer's advantage is price (Free vs $19.99) and update cadence (fortnightly vs every 4 months). On device support there is nothing between them.

Spectrum Analyzer is free to download; Ultrasonic Analyzer costs $19.99 up front. Spectrum Analyzer sells 13 in-app purchases, starting at $4.99 per 7 days. Ultrasonic Analyzer asks for nothing beyond the download.

Spectrum Analyzer holds the better App Store score, 4.2 against 3.9. That said, the two scores are not equally well evidenced: Spectrum Analyzer has 197 ratings behind it against 35, so its average is the more settled of the two. Written reviews complicate that: 57% of Ultrasonic Analyzer's written reviews are positive against 5% of Spectrum Analyzer's, so the app with the better star average is not the one people write more warmly about.

Ultrasonic Analyzer ships an update every 4 months, Spectrum Analyzer fortnightly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Ultrasonic Analyzer | Spectrum Analyzer |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [3.9 (35 ratings)](https://appshunter.io/ios/app/ultrasonic-analyzer/id851069926/reviews) | **[4.2 (197 ratings)](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895/reviews)** |
| Number of ratings | 35 | **197** |
| Positive reviews | **57.1% of reviews** | 5.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | **Freemium** |
| Size | 2 MB | 132 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DEXUS Pawel Krzywdzinski](https://appshunter.io/developer/377798036) | [Music Breath](https://appshunter.io/developer/1140008995) |

## What reviewers say

### Ultrasonic Analyzer

[App page](https://appshunter.io/ios/app/ultrasonic-analyzer/id851069926)

This app provides real-time audio analysis with visual representations of sound frequencies. It allows users to listen to and analyze ultrasounds, with options for transposed playback and slowed-down analysis of inaudible sounds. It supports various sampling rates and offers detailed charting and measurement tools.

**Highlights:** Real-time spectrum analysis, Spectrogram and oscilloscope views, Octave RTA analyzer, Transposed ultrasound listening, Slowed-down playback, High sampling rates up to 384kHz, Zoom and pan capabilities

**In-app purchases:** none


### Spectrum Analyzer

[App page](https://appshunter.io/ios/app/spectrum-analyzer-spectrogram/id981810895)

Visualize audio frequencies with real-time analysis. Features include a sound level meter, multichannel harmonic analysis, and adjustable graphical representations. Gain insights into your sound environment with advanced tools.

**Highlights:** Sound level meter, Multichannel harmonic analysis, Adjustable graphics, AI-powered sound source analyzer, Real-time analysis, FFT analysis

**Features:** macOS Compatibility

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pitch Finder: Audio Visualizer | $4.99 | per 7 days |
| Pitch Finder: Audio Visualizer | $9.99 | per month |
| One Month Sale | $9.99 | per month |
| 1 Week Subscription | $9.99 | per 7 days |
| 1 Year Sub. with discount | $19.99 | per year |
| 1 Month Subscription | $19.99 | per month |
| 3 Month Subscription | $25.99 | per 3 months |
| 1 Year Subscription | $39.99 | per year |
| 2 months subscription | $39.99 | per 2 months |
| No Ads | $9.99 | one-time |
| Additional Settings Controls | $15.99 | one-time |
| Full Pack + No Ads | $19.99 | one-time |
| Get More | $19.99 | one-time |

**What reviewers like**

- ✅ Accurate frequency identification
- ✅ Clear and easy-to-read display
- ✅ Useful noise floor setup feature
- ✅ Works well when ads are removed

**What reviewers complain about**

- 💰 Extremely aggressive monetization strategy
- 📢 Excessive and intrusive ads
- 🔊 Loud ads that ignore device mute settings
- 🚫 Requires subscription/payment to access core features
- 😤 Deceptive purchase practices and accidental charges

**Reported bugs**

- App becomes unusable after iOS 16 update
- Crashes immediately on iPhone 5 with iOS 7
- Cannot exit app on iPhone X without reboot
- App freezes when changing settings or views
- Inaccurate frequency readings

**Requested features**

- Audio file import functionality
- Customizable background colors for chroma key compatibility
- Ability to record audio instead of only analyzing
- Better documentation and help files
- Improved sensitivity for detecting soft sounds


## Frequently asked questions

### Is Ultrasonic Analyzer free?

Ultrasonic Analyzer costs $19.99, with no in-app purchases.

### Is Spectrum Analyzer free?

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

### Which has better reviews, Ultrasonic Analyzer or Spectrum Analyzer?

Spectrum Analyzer is rated higher. Ultrasonic Analyzer averages 3.9 out of 5 from 35 ratings, while Spectrum Analyzer averages 4.2 from 197 ratings.

### Do Ultrasonic Analyzer or Spectrum Analyzer have ads?

Spectrum Analyzer shows ads; Ultrasonic Analyzer does not.

### Which is updated more often, Ultrasonic Analyzer or Spectrum Analyzer?

Ultrasonic Analyzer ships an update every 4 months, and Spectrum Analyzer fortnightly. Most recently, Ultrasonic Analyzer was updated on September 23, 2026 and Spectrum Analyzer 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.*