# dB Noise Meter vs 123 Sleep

The clearest difference is in-app purchases: 123 Sleep at none against dB Noise Meter's 5. 123 Sleep also leads on ads (none vs shown). dB Noise Meter's advantage is update cadence (every 2 months vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. dB Noise Meter sells 5 in-app purchases, starting at $6.99 per 7 days. 123 Sleep asks for nothing beyond the download.

dB Noise Meter ships an update every 2 months, 123 Sleep every 7 months. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | dB Noise Meter | 123 Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (125 ratings)](https://appshunter.io/ios/app/db-noise-meter/id1590850487/reviews)** | — |
| Number of ratings | **125** | — |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 49 MB | 25 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 17+ |
| Developer | [Petr Polasek](https://appshunter.io/developer/1613323784) | [123 Health Tech Limited](https://appshunter.io/developer/1883291371) |

## What reviewers say

### dB Noise Meter

[App page](https://appshunter.io/ios/app/db-noise-meter/id1590850487)

Measure ambient noise levels in decibels (dB) using your phone's microphone. Track real-time noise, identify loud appliances, and monitor your exposure to potentially harmful sound levels.

**Highlights:** Real-time decibel measurement, Noise level tracking, Appliance noise testing, Save noise measurements, Display min/max/avg dB

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 week | $6.99 | per 7 days |
| Premium 1 Month | $9.99 | per month |
| Premium 3 Months | $17.99 | per 3 months |
| Premium 6 Months | $19.99 | per 6 months |
| Premium 1 Year | $29.99 | per year |


### 123 Sleep

[App page](https://appshunter.io/ios/app/123-sleep/id6760216004)

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

**In-app purchases:** none


## Frequently asked questions

### Is dB Noise Meter free?

dB Noise Meter is free to download, with in-app purchases available.

### Is 123 Sleep free?

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

### Do dB Noise Meter or 123 Sleep have ads?

dB Noise Meter shows ads; 123 Sleep does not.

### Which is updated more often, dB Noise Meter or 123 Sleep?

dB Noise Meter ships an update every 2 months, and 123 Sleep every 7 months. Most recently, dB Noise Meter was updated on November 3, 2026 and 123 Sleep on October 31, 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.*