# xiaolanLock vs Decibels Meter

The clearest difference is update cadence: Decibels Meter at every 9 days against xiaolanLock's monthly. xiaolanLock's advantage is iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

xiaolanLock ships an update monthly, Decibels Meter every 9 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | xiaolanLock | Decibels Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibels-meter/id6755508693/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | — | Free |
| Size | 32 MB | 27 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [庆省 韩](https://appshunter.io/developer/1441108108) | [剑 罗](https://appshunter.io/developer/1854272181) |

## What reviewers say

### xiaolanLock

[App page](https://appshunter.io/ios/app/xiaolanlock/id1530035531)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibels Meter

[App page](https://appshunter.io/ios/app/decibels-meter/id6755508693)

Monitor real-time decibel levels at concerts and festivals. Capture moments with watermarked photos and receive alerts for potentially harmful sound levels to protect your hearing.

**Highlights:** Real-time decibel monitoring, Watermark camera for concert photos, Hearing protection alerts, Sound pressure level measurement, Venue sound terminology

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is xiaolanLock free?

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

### Is Decibels Meter free?

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

### Do xiaolanLock or Decibels Meter have ads?

Neither xiaolanLock nor Decibels Meter shows ads.

### Which is updated more often, xiaolanLock or Decibels Meter?

xiaolanLock ships an update monthly, and Decibels Meter every 9 days. Most recently, xiaolanLock was updated on November 7, 2026 and Decibels Meter on November 5, 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.*