# Ultrasonic Analyzer vs Koala Sampler

The clearest difference is price: Koala Sampler at $4.99 against Ultrasonic Analyzer's $19.99. Koala Sampler also leads on rating (4.8 vs 3.9) and review sentiment (88% vs 56%). Ultrasonic Analyzer's advantage is in-app purchases (none vs 7) and iOS requirement (12.4 vs 15.0). On ads, monetization model and device support there is nothing between them.

Ultrasonic Analyzer costs $19.99 and Koala Sampler $4.99 up front. Koala Sampler sells 7 one-off in-app purchases. Ultrasonic Analyzer asks for nothing beyond the download.

Koala Sampler holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Koala Sampler has 1.5K ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 56% of Ultrasonic Analyzer's written reviews are positive against 88% of Koala Sampler's.

Ultrasonic Analyzer ships an update every 4 months, Koala Sampler every 3 weeks. Both last shipped on November 6, 2026.

## The numbers

| Metric | Ultrasonic Analyzer | Koala Sampler |
| --- | --- | --- |
| Price | $19.99 | **$4.99** |
| Rating | [3.9 (35 ratings)](https://appshunter.io/ios/app/ultrasonic-analyzer/id851069926/reviews) | **[4.8 (1.5K ratings)](https://appshunter.io/ios/app/koala-sampler-beat-maker/id1449584007/reviews)** |
| Number of ratings | 35 | **1.5K** |
| Positive reviews | 55.9% of reviews | **88.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#7** |
| Size | 2 MB | 61 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DEXUS Pawel Krzywdzinski](https://appshunter.io/developer/377798036) | [Mazbox Limited](https://appshunter.io/developer/329604853) |

## 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


### Koala Sampler

[App page](https://appshunter.io/ios/app/koala-sampler-beat-maker/id1449584007)

**Currently charting:** #7 Top Paid · Music, #34 Top Paid (US App Store)

Record sounds, create beats, and produce tracks with this intuitive pocket sampler. Transform audio with built-in effects and export your creations in professional quality. Ideal for instant music-making on the go.

**Highlights:** Record and load up to 64 samples, Transform sounds with 16 built-in effects, Create beats with a high-resolution sequencer, Export loops and tracks as WAV files, AUv3 and MIDI compatibility, AI-powered sample separation

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ese-O's Sample Pack | $2.99 | one-time |
| Solar Studies Samplepack | $2.99 | one-time |
| Soon Come Dub Sample Pack | $2.99 | one-time |
| Analog Astronaut Samplepack | $2.99 | one-time |
| Cirrus Cuts Sample Pack | $2.99 | one-time |
| Samurai Edition | $3.99 | one-time |
| Mixer | $4.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- 🚀 Smooth workflow and fast performance
- 💡 Powerful sampling and sequencing capabilities
- 🔥 Excellent value for the price
- 🎨 Creative and inspiring sound design

**What reviewers complain about**

- 🐛 Occasional crashes and stability issues
- 🔇 Limited effects and sound manipulation options
- 📁 Difficulty managing and organizing samples/projects
- 🎚️ Lack of advanced MIDI mapping and control options
- 🔍 Unclear or confusing UI elements in certain areas

**Reported bugs**

- Samples not loading or disappearing after app updates
- Sequencer timing and quantization issues
- Crashes when using certain features or with large projects

**Requested features**

- Ability to record and edit MIDI sequences
- More comprehensive effects and sound processing tools
- Improved sample management and organization features
- Support for external MIDI controllers and hardware integration
- Customizable color schemes and UI themes


## Frequently asked questions

### Is Ultrasonic Analyzer free?

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

### Is Koala Sampler free?

Koala Sampler costs $4.99, and also offers in-app purchases.

### Which has better reviews, Ultrasonic Analyzer or Koala Sampler?

Koala Sampler is rated higher. Ultrasonic Analyzer averages 3.9 out of 5 from 35 ratings, while Koala Sampler averages 4.8 from 1.5K ratings.

### Do Ultrasonic Analyzer or Koala Sampler have ads?

Neither Ultrasonic Analyzer nor Koala Sampler shows ads.

### Which is updated more often, Ultrasonic Analyzer or Koala Sampler?

Ultrasonic Analyzer ships an update every 4 months, and Koala Sampler every 3 weeks. Most recently, Ultrasonic Analyzer was updated on November 6, 2026 and Koala Sampler on November 6, 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.*