# Frequency Analyzer vs SPL Reference

Frequency Analyzer and SPL Reference are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Frequency Analyzer sells 10 in-app purchases, starting at $2.99 per 7 days and SPL Reference sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Frequency Analyzer ships an update weekly, SPL Reference every 2 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Frequency Analyzer | SPL Reference |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (188 ratings)](https://appshunter.io/ios/app/frequency-analyzer/id6468837339/reviews)** | — |
| Number of ratings | **188** | — |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 6 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Moonbush Games & Utilities App GmbH](https://appshunter.io/developer/1520736594) | [Direct Sound Records Ltd](https://appshunter.io/developer/1896279797) |

## What reviewers say

### Frequency Analyzer

[App page](https://appshunter.io/ios/app/frequency-analyzer/id6468837339)

Transform your device into a professional audio analysis tool with real-time FFT, SPL monitoring, and advanced visualization. Record, analyze, and export high-quality audio and video data for various acoustic applications.

**Highlights:** Real-time FFT analysis, Calibrated SPL measurement, High-resolution spectrum analyzer, Real-time waveform display, 32-bit float audio recording, Synchronized video recording, Export WAV, CSV, images, and videos

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Frequency Analyzer Pro Weekly | $2.99 | per 7 days |
| Frequency Analyzer Pro Weekly | $2.99 | per 7 days |
| Frequency Analyzer Pro Monthly | $3.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Monthly | $4.99 | per month |
| Frequency Analyzer Pro Annual | $29.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Frequency Analyzer Pro Annual | $44.99 | per year |
| Pro access for lifetime | $89.99 | one-time |


### SPL Reference

[App page](https://appshunter.io/ios/app/spl-reference/id6806757498)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Professional Unlock | $39.99 | one-time |


## Frequently asked questions

### Is Frequency Analyzer free?

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

### Is SPL Reference free?

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

### Do Frequency Analyzer or SPL Reference have ads?

Neither Frequency Analyzer nor SPL Reference shows ads.

### Which is updated more often, Frequency Analyzer or SPL Reference?

Frequency Analyzer ships an update weekly, and SPL Reference every 2 weeks. Most recently, Frequency Analyzer was updated on November 8, 2026 and SPL Reference on October 31, 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.*