# Decibel Meter ! vs Eruption Time

The clearest difference is in-app purchases: Eruption Time at none against Decibel Meter !'s 4. Eruption Time also leads on ads (none vs shown). On price, update cadence, device support 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. Eruption Time asks for nothing beyond the download.

Decibel Meter ! ships an update fortnightly, Eruption Time every 3 weeks. The most recent releases landed on October 10, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Decibel Meter ! | Eruption Time |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 104 MB | 8 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pravin Gondaliya](https://appshunter.io/developer/1210259494) | [Project Barn LLC](https://appshunter.io/developer/1869576301) |

## What reviewers say

### 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 |


### Eruption Time

[App page](https://appshunter.io/ios/app/eruption-time/id6780317289)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter ! free?

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

### Is Eruption Time free?

Eruption Time is free to download, with no in-app purchases.

### Do Decibel Meter ! or Eruption Time have ads?

Decibel Meter ! shows ads; Eruption Time does not.

### Which is updated more often, Decibel Meter ! or Eruption Time?

Decibel Meter ! ships an update fortnightly, and Eruption Time every 3 weeks. Most recently, Decibel Meter ! was updated on October 10, 2026 and Eruption Time on September 29, 2026.

---

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