# Decibel Shield vs MayoLynx

The clearest difference is in-app purchases: MayoLynx at none against Decibel Shield's 4. Decibel Shield's advantage is update cadence (daily vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Shield sells 4 in-app purchases, starting at $1.99 per 7 days. MayoLynx asks for nothing beyond the download.

Decibel Shield ships an update daily, MayoLynx every 3 weeks. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Decibel Shield | MayoLynx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (636 ratings)](https://appshunter.io/ios/app/decibel-shield-db-meter/id6461600902/reviews)** | — |
| Number of ratings | **636** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 62 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [APPSTACK LLC](https://appshunter.io/developer/1454414263) | [JEFFERY MARK SHOUL](https://appshunter.io/developer/1892505751) |

## 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 |


### MayoLynx

[App page](https://appshunter.io/ios/app/mayolynx/id6762022923)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Shield free?

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

### Is MayoLynx free?

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

### Do Decibel Shield or MayoLynx have ads?

Neither Decibel Shield nor MayoLynx shows ads.

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

Decibel Shield ships an update daily, and MayoLynx every 3 weeks. Most recently, Decibel Shield was updated on October 25, 2026 and MayoLynx on October 14, 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.*