# Decibel Meter vs Link App

The clearest difference is in-app purchases: Link App at none against Decibel Meter's 2. Link App also leads on ads (none vs shown) and review sentiment (67% vs 40%). Decibel Meter's advantage is update cadence (every 3 weeks vs every 3 months) and ratings volume (222 vs 5). On price and device support there is nothing between them.

Both are free to download. Decibel Meter sells 2 in-app purchases, starting at $0.99 per month. Link App asks for nothing beyond the download.

Link App holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Decibel Meter has 222 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 40% of Decibel Meter's written reviews are positive against 67% of Link App's.

Decibel Meter ships an update every 3 weeks, Link App every 3 months. The most recent releases landed on November 2, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Decibel Meter | Link App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (222 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-meter/id1373636871/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/link-app/id6444118938/reviews)** |
| Number of ratings | **222** | 5 |
| Positive reviews | 40.5% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 30 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MYSTIC MOBILE APPS LLC](https://appshunter.io/developer/1481942662) | [Samuel Corra](https://appshunter.io/developer/1652460468) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-sound-meter/id1373636871)

Transform your smartphone into a precise sound measuring device. This app uses your phone's microphone to display real-time decibel levels with clear descriptions. Analyze sound over time, calibrate for accuracy, and share your findings easily.

**Highlights:** Real-time decibel measurement, Min, average, and max sound levels, Apple Watch integration, Customizable calibration, Data sharing (CSV, screenshots), Historical data tracking, Cloud data storage

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Sound Meter+ | $0.99 | per month |
| Annual Sound Meter+ | $5.99 | per year |


### 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 Meter free?

Decibel Meter 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 Meter or Link App?

Link App is rated higher. Decibel Meter averages 4.3 out of 5 from 222 ratings, while Link App averages 4.6 from 5 ratings.

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

Decibel Meter shows ads; Link App does not.

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

Decibel Meter ships an update every 3 weeks, and Link App every 3 months. Most recently, Decibel Meter was updated on November 2, 2026 and Link App on October 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*