# Sound Meter (SPL meter) vs Turtle Timer

The clearest difference is price: Turtle Timer at Free against Sound Meter (SPL meter)'s $0.99. Turtle Timer also leads on in-app purchases (none vs 1) and ads (none vs shown). Sound Meter (SPL meter)'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.6).

Turtle Timer is free to download; Sound Meter (SPL meter) costs $0.99 up front. Sound Meter (SPL meter) sells 1 one-off in-app purchase. Turtle Timer asks for nothing beyond the download.

## The numbers

| Metric | Sound Meter (SPL meter) | Turtle Timer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | — |
| Monetization | Ad-supported | — |
| Size | 25 MB | 4 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [庆鸿 林](https://appshunter.io/developer/1558629938) | [James Haydon](https://appshunter.io/developer/1815303172) |

## What reviewers say

### Sound Meter (SPL meter)

[App page](https://appshunter.io/ios/app/sound-meter-spl-meter/id1558634102)

This utility app uses your device's microphone to measure ambient noise levels in decibels. It displays readings with graphical representations and provides historical data like minimum, average, and maximum values. Calibration options are available for different devices.

**Highlights:** Measures noise in decibels (dB), Displays decibel readings on a gauge, Shows current, min, avg, and max dB values, Graphs decibel levels over time, Tracks elapsed time of measurements, Allows device-specific decibel calibration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $0.99 | one-time |


### Turtle Timer

[App page](https://appshunter.io/ios/app/turtle-timer/id6746129446)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sound Meter (SPL meter) free?

Sound Meter (SPL meter) costs $0.99, and also offers in-app purchases.

### Is Turtle Timer free?

Turtle Timer is free to download, with no in-app purchases.

### Do Sound Meter (SPL meter) or Turtle Timer have ads?

Sound Meter (SPL meter) shows ads; Turtle Timer does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*