# Decibel vs 推しClock

The clearest difference is in-app purchases: 推しClock at none against Decibel's 5. 推しClock also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decibel sells 2 in-app purchases, starting at $9.99 per 7 days. 推しClock asks for nothing beyond the download.

Decibel ships an update every 6 weeks, 推しClock every 2 months. The most recent releases landed on October 19, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Decibel | 推しClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (3 ratings)](https://appshunter.io/ios/app/decibel-db-sound-meter/id6755168199/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 180 MB | 34 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [芳 王](https://appshunter.io/developer/1674464173) | [AKIHIRO FURUSAWA](https://appshunter.io/developer/1896185834) |

## What reviewers say

### Decibel

[App page](https://appshunter.io/ios/app/decibel-db-sound-meter/id6755168199)

This app provides precise sound level measurements and audio analysis using professional weighting filters and real-time FFT spectrum analysis. It functions as a dosimeter for workplace safety and allows for easy sharing of dB data overlays on photos.

**Highlights:** Professional Frequency Weighting (ITU-R 468, A/B/C/Z), Real-Time FFT Spectrum Analysis, NIOSH & OSHA Standard Dosimeter, High-Precision Calibration, InstaDecibel Image Overlay, Live Activities Support, History Management & Export (PDF/M4A)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly VIP | $9.99 | per 7 days |
| Weekly VIP | $9.99 | per 7 days |


### 推しClock

[App page](https://appshunter.io/ios/app/clock/id6780210686)

**In-app purchases:** none


## Frequently asked questions

### Is Decibel free?

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

### Is 推しClock free?

推しClock is free to download, with no in-app purchases.

### Do Decibel or 推しClock have ads?

Neither Decibel nor 推しClock shows ads.

### Which is updated more often, Decibel or 推しClock?

Decibel ships an update every 6 weeks, and 推しClock every 2 months. Most recently, Decibel was updated on October 19, 2026 and 推しClock on October 21, 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.*