# dB Noise Meter vs Motion Alert

The clearest difference is ads: Motion Alert at none against dB Noise Meter's shown. Motion Alert also leads on update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, 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 and Motion Alert sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

dB Noise Meter ships an update every 2 months, Motion Alert every 2 weeks. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | dB Noise Meter | Motion Alert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (122 ratings)](https://appshunter.io/ios/app/db-noise-meter/id1590850487/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 49 MB | 1 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Petr Polasek](https://appshunter.io/developer/1613323784) | [Viatcheslav Ortynskiy](https://appshunter.io/developer/1479286749) |

## 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 |


### Motion Alert

[App page](https://appshunter.io/ios/app/motion-alert/id6813101884)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Unlock | $9.99 | one-time |


## Frequently asked questions

### Is dB Noise Meter free?

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

### Is Motion Alert free?

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

### Do dB Noise Meter or Motion Alert have ads?

dB Noise Meter shows ads; Motion Alert does not.

### Which is updated more often, dB Noise Meter or Motion Alert?

dB Noise Meter ships an update every 2 months, and Motion Alert every 2 weeks. Most recently, dB Noise Meter was updated on October 23, 2026 and Motion Alert on October 9, 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.*