# Decibel X vs Link App

The clearest difference is in-app purchases: Link App at none against Decibel X's 5. Link App also leads on iOS requirement (11.0 vs 17.0). Decibel X's advantage is ratings volume (164K vs 5). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for Decibel X against 4.6 for Link App. That said, the two scores are not equally well evidenced: Decibel X has 164K ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 66% and 67% positive.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Decibel X | Link App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (164K ratings)](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923/reviews)** | [4.6 (5 ratings)](https://appshunter.io/ios/app/link-app/id6444118938/reviews) |
| Number of ratings | **164K** | 5 |
| Positive reviews | 66.3% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Freemium | **Free** |
| Size | 90 MB | 30 MB |
| Requires iOS | 17.0 | **11.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SkyPaw Co., Limited](https://appshunter.io/developer/1842040687) | [Samuel Corra](https://appshunter.io/developer/1652460468) |

## 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


### Link App

[App page](https://appshunter.io/ios/app/link-app/id6444118938)

This app assists coffee roasters by recommending ideal roast profiles based on detailed coffee input. It offers advanced features for various coffee types and roasting conditions, ensuring optimal results.

**Highlights:** Algorithmic roast profile selection, Altitude calibration, Arabica advanced input, All species mode for non-Arabica, Advanced roast details, Heirloom cupping for landrace varieties

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel X free?

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

### Is Link App free?

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

### Which has better reviews, Decibel X or Link App?

Decibel X is rated higher. Decibel X averages 4.6 out of 5 from 164K ratings, while Link App averages 4.6 from 5 ratings.

### Do Decibel X or Link App have ads?

Neither Decibel X nor Link App shows ads.

### Which is updated more often, Decibel X or Link App?

Decibel X ships an update every 3 months, and Link App every 3 months. Most recently, Decibel X was updated on November 5, 2026 and Link App on November 3, 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.*