# Decibel X vs IoT keyes

The clearest difference is review sentiment: Decibel X at 66% against IoT keyes's 0%. Decibel X also leads on rating (4.6 vs 3.0) and ratings volume (164K vs 4). IoT keyes's advantage is in-app purchases (none vs 5) and iOS requirement (10.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Decibel X sells 5 in-app purchases, starting at $1.99 per 7 days. IoT keyes asks for nothing beyond the download.

Decibel X holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Decibel X has 164K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 66% of Decibel X's written reviews are positive against 0% of IoT keyes's.

## The numbers

| Metric | Decibel X | IoT keyes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (164K ratings)](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/iot-keyes/id1487578236/reviews) |
| Number of ratings | **164K** | 4 |
| Positive reviews | **66.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Freemium | **Free** |
| Size | 90 MB | 13 MB |
| Requires iOS | 17.0 | **10.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SkyPaw Co., Limited](https://appshunter.io/developer/1842040687) | [克俭 左](https://appshunter.io/developer/1449795321) |

## What reviewers say

### Decibel X

[App page](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923)

This tool transforms your device into a professional sound level meter, offering precise measurements of ambient noise. It features advanced calibration, frequency analysis, and data management for various applications, from personal curiosity to professional use.

**Highlights:** Pre-calibrated sound pressure level (SPL) measurements, Frequency weighting filters (dBA, dBC, ITU-R 468), Apple Watch and Health App integration, History data management with export options, Dosimeter with NIOSH, OSHA standards, FFT and BAR graphs for real-time frequency analysis, InstaDecibel for sharing dB reports on photos

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $1.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Annual Membership | $49.99 | per year |
| ITU-R 468, A, B, C Weightings | $1.99 | one-time |
| Data Export | $2.99 | one-time |

**What reviewers like**

- ⭐ Excellent app
- 👍 Easy to use and understand
- 🔍 Useful for various applications
- 🎓 Helpful for hearing protection
- 🔧 Accurate and reliable

**What reviewers complain about**

- 💰 Expensive subscription model
- 🔒 Misleading free trial
- 📢 Intrusive ads
- 🤖 Inaccurate readings compared to professional meters
- 🤔 Confusing interface

**Reported bugs**

- App crashes when deleting recordings
- Microphone issues on certain devices
- Saved files not accessible after updates

**Requested features**

- Add GPS coordinates to recordings
- Improve reporting and data export
- Provide more weighting options
- Extend frequency range
- Allow music playback while using the app


### IoT keyes

[App page](https://appshunter.io/ios/app/iot-keyes/id1487578236)

This Bluetooth 4.0 application is designed to control smart home products from Keyestudio. It allows users to manage their connected devices through a simple interface.

**Highlights:** Bluetooth 4.0 connectivity, Smart home device control, Keyestudio product compatibility, Simple user interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Decibel X free?

Decibel X is free to download, with in-app purchases available.

### Is IoT keyes free?

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

### Which has better reviews, Decibel X or IoT keyes?

Decibel X is rated higher. Decibel X averages 4.6 out of 5 from 164K ratings, while IoT keyes averages 3.0 from 4 ratings.

### Do Decibel X or IoT keyes have ads?

Neither Decibel X nor IoT keyes shows ads.

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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.*