# SPL Reference vs Sound Meter

SPL Reference and Sound Meter are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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. SPL Reference sells 1 one-off in-app purchase and Sound Meter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | SPL Reference | Sound Meter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 6 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Direct Sound Records Ltd](https://appshunter.io/developer/1896279797) | [Nguyen SonTung](https://appshunter.io/developer/1335064360) |

## What reviewers say

### 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 |


### Sound Meter

[App page](https://appshunter.io/ios/app/sound-meter-audio-analyzer/id6816288898)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound Meter Pro | $9.99 | one-time |


## Frequently asked questions

### Is SPL Reference free?

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

### Is Sound Meter free?

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

### Do SPL Reference or Sound Meter have ads?

Neither SPL Reference nor Sound Meter shows ads.

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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.*