# mail.de Authenticator vs Decibel Sound Meter

The clearest difference is review sentiment: Decibel Sound Meter at 100% against mail.de Authenticator's 25%. Decibel Sound Meter also leads on update cadence (monthly vs every 17 months). mail.de Authenticator's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Decibel Sound Meter sells 2 in-app purchases, starting at $17.99 per year. mail.de Authenticator asks for nothing beyond the download.

mail.de Authenticator ships an update every 17 months, Decibel Sound Meter monthly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | mail.de Authenticator | Decibel Sound Meter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 29 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [mail.de GmbH](https://appshunter.io/developer/567429768) | [Ungo Inc.](https://appshunter.io/developer/1813952838) |

## What reviewers say

### mail.de Authenticator

[App page](https://appshunter.io/ios/app/mailde-authenticator/id567429765)

Enhance your email account security with this app, which generates one-time codes for two-factor authentication. It requires initial setup within your email account settings to activate.

**Highlights:** Two-factor authentication, Enhanced email security, Generates one-time codes, Requires account setup

**Features:** Vision Pro support

**In-app purchases:** none


### Decibel Sound Meter

[App page](https://appshunter.io/ios/app/decibel-sound-meter-dblyze/id6745800603)

This professional noise analyzer transforms your device into a precise sound level meter. It visualizes sound, tracks noise exposure with compliance features, and offers advanced spectrum analysis. Monitor your environment, protect your hearing, and generate detailed reports.

**Highlights:** Real-time SPL readings, Professional noise dosimeter, Advanced spectrum analyzer (RTA), Dynamic Island & Live Activities integration, Home screen widgets, Data logging and export

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads | $17.99 | per year |
| dBlyze Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is mail.de Authenticator free?

mail.de Authenticator is free to download, with no in-app purchases.

### Is Decibel Sound Meter free?

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

### Do mail.de Authenticator or Decibel Sound Meter have ads?

Decibel Sound Meter shows ads; mail.de Authenticator does not.

### Which is updated more often, mail.de Authenticator or Decibel Sound Meter?

mail.de Authenticator ships an update every 17 months, and Decibel Sound Meter monthly. Most recently, mail.de Authenticator was updated on October 29, 2026 and Decibel Sound Meter on October 31, 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.*