# Decibel vs Ooly

The clearest difference is update cadence: Ooly at every 3 months against Decibel's every 18 months. 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.

Decibel ships an update every 18 months, Ooly every 3 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Decibel | Ooly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (475 ratings)](https://appshunter.io/ios/app/decibel-accurate-db-meter/id1130936133/reviews)** | — |
| Number of ratings | **475** | — |
| Positive reviews | 45.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 4 MB | 14 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [祥祎 刘](https://appshunter.io/developer/1071522659) | [Ilia Kambarov](https://appshunter.io/developer/1750574381) |

## What reviewers say

### Decibel

[App page](https://appshunter.io/ios/app/decibel-accurate-db-meter/id1130936133)

Transform your device into a professional sound meter to accurately measure ambient noise levels. Understand how loud your surroundings are, from quiet rooms to loud events, and learn about potential hearing risks.

**Highlights:** Accurate sound pressure level measurement, Measures decibels (dB), Provides real-time sound intensity readings, Useful for understanding noise pollution, Helps identify potential hearing hazards

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and intuitive
- 💡 Useful for measuring noise levels
- 🚀 Easy to use
- 🔍 Provides instant and average readings

**What reviewers complain about**

- 🐛 Inaccurate readings
- 🔍 Overly sensitive microphone
- 🔍 Inconsistent measurements
- 🔍 Readings too high compared to other apps

**Reported bugs**

- App shows high decibel readings even in silent environments
- Microphone issues causing inaccurate measurements
- App freezes or stops working

**Requested features**

- Ability to calibrate the app
- Option to record and save measurement history
- Add peak hold feature
- Improve spelling and grammar


### Ooly

[App page](https://appshunter.io/ios/app/ooly/id6777826167)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel free?

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

### Is Ooly free?

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

### Do Decibel or Ooly have ads?

Neither Decibel nor Ooly shows ads.

### Which is updated more often, Decibel or Ooly?

Decibel ships an update every 18 months, and Ooly every 3 months. Most recently, Decibel was updated on October 29, 2026 and Ooly on October 25, 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.*