# Decibel Meter+ Sound Level dB vs Effect

The clearest difference is ads: Effect at none against Decibel Meter+ Sound Level dB's shown. Effect also leads on update cadence (every 4 days vs every 11 days) and iOS requirement (9.0 vs 16.4). On price, 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.

Decibel Meter+ Sound Level dB ships an update every 11 days, Effect every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Decibel Meter+ Sound Level dB | Effect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/decibel-meter-plus-sound-level-db/id1593197145/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 days | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 59 MB | 12 MB |
| Requires iOS | 16.4 | **9.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) | [GUANDDONG TIANPU TECHNOLOGY GROUP CO.,LTD.](https://appshunter.io/developer/1637560013) |

## What reviewers say

### Decibel Meter+ Sound Level dB

[App page](https://appshunter.io/ios/app/decibel-meter-plus-sound-level-db/id1593197145)

This app measures sound levels in decibels using your iPhone's microphone. It offers OSHA/NIOSH noise dose tracking, A/C/Z weighting, and calibration for accurate readings. Monitor workplace, neighborhood, or event noise with a clear, color-coded display.

**Highlights:** Real-time decibel measurement (0–120 dB SPL), OSHA + NIOSH 8-hour noise dose tracking, A / C / Z weighting toggle, One-tap quiet room calibration, Color-coded radial gauge, Live waveform chart, Min, Average, and Max dB tracking

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

**In-app purchases:** none


### Effect

[App page](https://appshunter.io/ios/app/effect/id6758289667)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter+ Sound Level dB free?

Decibel Meter+ Sound Level dB is free to download, with no in-app purchases.

### Is Effect free?

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

### Do Decibel Meter+ Sound Level dB or Effect have ads?

Decibel Meter+ Sound Level dB shows ads; Effect does not.

### Which is updated more often, Decibel Meter+ Sound Level dB or Effect?

Decibel Meter+ Sound Level dB ships an update every 11 days, and Effect every 4 days. Most recently, Decibel Meter+ Sound Level dB was updated on November 3, 2026 and Effect 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.*