# Decibels Meter vs AR尺子测量测距

The clearest difference is in-app purchases: Decibels Meter at none against AR尺子测量测距's 7. Decibels Meter also leads on update cadence (every 9 days vs monthly) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. AR尺子测量测距 sells 7 in-app purchases, starting at $3.99 per 7 days. Decibels Meter asks for nothing beyond the download.

Decibels Meter ships an update every 9 days, AR尺子测量测距 monthly. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Decibels Meter | AR尺子测量测距 |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | Free | — |
| Size | 27 MB | 10 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [剑 罗](https://appshunter.io/developer/1854272181) | [Zhengzhou Fufawei Network Technology Co., Ltd.](https://appshunter.io/developer/6786145921) |

## What reviewers say

### 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


### AR尺子测量测距

[App page](https://appshunter.io/ios/app/ar/id6792695962)

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周卡会员 | $3.99 | per 7 days |
| 月卡会员 | $6.99 | per month |
| 年卡会员 | $12.99 | per year |
| 月卡会员 | $3.99 | one-time |
| 一年会员 | $6.99 | one-time |
| 两年会员 | $7.99 | one-time |
| 永久会员 | $9.99 | one-time |


## Frequently asked questions

### Is Decibels Meter free?

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

### Is AR尺子测量测距 free?

AR尺子测量测距 is free to download, with in-app purchases available.

### Do Decibels Meter or AR尺子测量测距 have ads?

Neither Decibels Meter nor AR尺子测量测距 shows ads.

### Which is updated more often, Decibels Meter or AR尺子测量测距?

Decibels Meter ships an update every 9 days, and AR尺子测量测距 monthly. Most recently, Decibels Meter was updated on November 5, 2026 and AR尺子测量测距 on November 10, 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.*