# SmartLink Control vs Decibel Meter

The clearest difference is in-app purchases: SmartLink Control at none against Decibel Meter's 3. SmartLink Control also leads on iOS requirement (9.0 vs 26.0). Decibel Meter's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter sells 3 in-app purchases, starting at $4.99 per 7 days. SmartLink Control asks for nothing beyond the download.

SmartLink Control ships an update every 3 months, Decibel Meter weekly. The most recent releases landed on October 23, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | SmartLink Control | Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 19 MB | 40 MB |
| Requires iOS | **9.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Holger Boelts](https://appshunter.io/developer/381063175) | [Emre Atik](https://appshunter.io/developer/1686436153) |

## What reviewers say

### SmartLink Control

[App page](https://appshunter.io/ios/app/smartlink-control/id381063172)

This application provides mobile visualization for operating and displaying functions within a networked building automation environment. It connects to various common building systems and offers comfort functions like scene storage and presence simulation. It also supports media technology control via LAN, IR, or RS232.

**Highlights:** Control building automation systems, Visualize system functions, Connects to KNX, LON, Crestron, and more, Scene storage and presence simulation, Media technology control (LAN, IR, RS232), Sonos basic function control via UPnP

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-noise-db-level/id6756323914)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Days Free Trial Weekly PRO | $4.99 | per 7 days |
| Decibel Meter Annual PRO | $21.90 | per year |
| Lifetime Access | $34.99 | one-time |


## Frequently asked questions

### Is SmartLink Control free?

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

### Is Decibel Meter free?

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

### Do SmartLink Control or Decibel Meter have ads?

Neither SmartLink Control nor Decibel Meter shows ads.

### Which is updated more often, SmartLink Control or Decibel Meter?

SmartLink Control ships an update every 3 months, and Decibel Meter weekly. Most recently, SmartLink Control was updated on October 23, 2026 and Decibel Meter on October 9, 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.*