# Sigma Timer vs Decibel Meter !

The clearest difference is in-app purchases: Sigma Timer at none against Decibel Meter !'s 4. Sigma Timer also leads on ads (none vs shown). Decibel Meter !'s advantage is device support (3 vs 1). On price and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter ! sells 4 in-app purchases, starting at $7.99 per 7 days. Sigma Timer asks for nothing beyond the download.

## The numbers

| Metric | Sigma Timer | Decibel Meter ! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (20 ratings)](https://appshunter.io/ios/app/decibel-meter/id6757183442/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 20 MB | 104 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Sigma Laborzentrifugen GmbH](https://appshunter.io/developer/1731355921) | [Pravin Gondaliya](https://appshunter.io/developer/1210259494) |

## What reviewers say

### Sigma Timer

[App page](https://appshunter.io/ios/app/sigma-timer/id6478013776)

**In-app purchases:** none


### Decibel Meter !

[App page](https://appshunter.io/ios/app/decibel-meter/id6757183442)

This app measures and analyzes sound levels in real-time, providing clear decibel readings and tracking noise changes. It offers advanced features like dosimeter functions, visual graphs, and the ability to capture photos and videos with dB overlays. Save and export your sound data for comprehensive insights into your environment.

**Highlights:** Real-time decibel readings, Advanced dosimeter functions, Multiple sound graphs, Photo & video capture with dB overlay, Recording history and export, Frequency analysis

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Week Premium Access | $7.99 | per 7 days |
| 1-Month Premium Access | $14.99 | per month |
| 1-Year Premium Access | $39.99 | per year |
| Lifetime Premium Access | $69.99 | one-time |


## Frequently asked questions

### Is Sigma Timer free?

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

### Is Decibel Meter ! free?

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

### Do Sigma Timer or Decibel Meter ! have ads?

Decibel Meter ! shows ads; Sigma Timer does not.

---

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