# Decibel Shield vs SyncToWin

The clearest difference is update cadence: Decibel Shield at daily against SyncToWin's every 5 days. Decibel Shield also leads on iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Decibel Shield sells 4 in-app purchases, starting at $1.99 per 7 days and SyncToWin sells 1 in-app purchase, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

Decibel Shield ships an update daily, SyncToWin every 5 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Decibel Shield | SyncToWin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (640 ratings)](https://appshunter.io/ios/app/decibel-shield-db-meter/id6461600902/reviews)** | — |
| Number of ratings | **640** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 3 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APPSTACK LLC](https://appshunter.io/developer/1454414263) | [Ricardo Alfaro-Ramos](https://appshunter.io/developer/1795162887) |

## What reviewers say

### Decibel Shield

[App page](https://appshunter.io/ios/app/decibel-shield-db-meter/id6461600902)

Measure and track sound levels in real-time with this user-friendly decibel meter. Log historical data, integrate with Apple Health, and gain insights into your sound environment. Includes a white noise generator for focused listening.

**Highlights:** Real-time decibel monitoring, Historical data tracking, Apple Health integration, White noise generator, iCloud sync, Location tagging, Background processing

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Monthly | $4.99 | per month |
| Annual Membership | $44.99 | per year |
| Premium Yearly | $49.99 | per year |


### SyncToWin

[App page](https://appshunter.io/ios/app/synctowin/id6741701480)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SyncToWin Monthly Subscription | $19.99 | per month |


## Frequently asked questions

### Is Decibel Shield free?

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

### Is SyncToWin free?

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

### Do Decibel Shield or SyncToWin have ads?

Neither Decibel Shield nor SyncToWin shows ads.

### Which is updated more often, Decibel Shield or SyncToWin?

Decibel Shield ships an update daily, and SyncToWin every 5 days. Most recently, Decibel Shield was updated on October 30, 2026 and SyncToWin on October 28, 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.*