# SPL vs Clear Stereo Sound

The clearest difference is price: Clear Stereo Sound at Free against SPL's $8.99. Clear Stereo Sound also leads on rating (4.6 vs 3.0) and update cadence (monthly vs every 6 months). SPL's advantage is in-app purchases (none vs 1). On review sentiment, ads, device support and iOS requirement there is nothing between them.

Clear Stereo Sound is free to download; SPL costs $8.99 up front. Clear Stereo Sound sells 1 in-app purchase, starting at $9.99 per month. SPL asks for nothing beyond the download.

Clear Stereo Sound holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Clear Stereo Sound has 159 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 68% of SPL's written reviews are positive against 61% of Clear Stereo Sound's, so the app with the better star average is not the one people write more warmly about.

SPL ships an update every 6 months, Clear Stereo Sound monthly. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SPL | Clear Stereo Sound |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/spl/id293573990/reviews) | **[4.6 (159 ratings)](https://appshunter.io/ios/app/clear-stereo-sound-clean-wave/id1660492550/reviews)** |
| Number of ratings | 4 | **159** |
| Positive reviews | **67.6% of reviews** | 60.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 30 MB | 30 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Artem Popov](https://appshunter.io/developer/1520523644) |

## What reviewers say

### SPL

[App page](https://appshunter.io/ios/app/spl/id293573990)

This professional-grade digital sound level meter measures decibels with advanced modes and filters meeting ANSI Type 1 standards. It allows storing, exporting, and calibrating measurements, and can be used with external calibrated microphones for precise results.

**Highlights:** Professional-grade digital sound level meter, ANSI/IEC Type 1 standards compliant filters and modes, Store, recall, and export GPS/time-stamped results, Supports external calibrated microphones, Adjustable calibration for accuracy, Internal mic compensation filter

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

**In-app purchases:** none


### Clear Stereo Sound

[App page](https://appshunter.io/ios/app/clear-stereo-sound-clean-wave/id1660492550)

Test and analyze your device's audio output with a variety of sound generation and measurement tools. Explore different frequencies, waveforms, and stereo configurations to ensure optimal sound quality. Includes features for relaxation and noise measurement.

**Highlights:** Sound test and check, Tone generator (1Hz-22kHz), Sound waveform display (sine, square, triangle), Stereo and bass test, Binaural beats for focus/relaxation, Noise mixing for sleep, Sound meter (dB measurement)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brown, Pink Noise for Sleep | $9.99 | per month |


## Frequently asked questions

### Is SPL free?

SPL costs $8.99, with no in-app purchases.

### Is Clear Stereo Sound free?

Clear Stereo Sound is free to download, with in-app purchases available.

### Which has better reviews, SPL or Clear Stereo Sound?

Clear Stereo Sound is rated higher. SPL averages 3.0 out of 5 from 4 ratings, while Clear Stereo Sound averages 4.6 from 159 ratings.

### Do SPL or Clear Stereo Sound have ads?

Neither SPL nor Clear Stereo Sound shows ads.

### Which is updated more often, SPL or Clear Stereo Sound?

SPL ships an update every 6 months, and Clear Stereo Sound monthly. Most recently, SPL was updated on October 31, 2026 and Clear Stereo Sound on November 3, 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.*