# Decibel Sound Meter vs 2FA Authenticator Code

The clearest difference is ads: 2FA Authenticator Code at none against Decibel Sound Meter's shown. 2FA Authenticator Code also leads on update cadence (every 5 weeks vs every 4 months) and rating (5.0 vs 4.8). Decibel Sound Meter's advantage is ratings volume (4 vs 1). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Decibel Sound Meter sells 3 in-app purchases, starting at $0.99 per 7 days and 2FA Authenticator Code sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

2FA Authenticator Code holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Decibel Sound Meter ships an update every 4 months, 2FA Authenticator Code every 5 weeks. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Decibel Sound Meter | 2FA Authenticator Code |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/decibel-sound-meter-db-spl/id1501310833/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/2fa-authenticator-code/id6758291742/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 9 MB | 10 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Grima Hdez](https://appshunter.io/developer/1741481582) | [FUTUREFOOD LLC](https://appshunter.io/developer/1872014126) |

## What reviewers say

### Decibel Sound Meter

[App page](https://appshunter.io/ios/app/decibel-sound-meter-db-spl/id1501310833)

Measure environmental noise levels and display decibel values in various formats. This smart sound meter app features a tidy graphic design and provides real-time noise detection using your mobile microphone. It offers clear visualizations of sound levels and includes helpful information about decibel measurements.

**Highlights:** Measures environmental noise decibel values, Displays dB values in various forms, Tidy graphic design with high frame rate, Uses mobile microphone for ambient noise measurement, Shows current, min, average, and max decibel values, Displays decibel change chart, Auto decibel value calibration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel PRO week sub | $0.99 | per 7 days |
| Decibel PRO mounth sub | $1.99 | per month |
| Decibel PRO year sub | $17.99 | per year |


### 2FA Authenticator Code

[App page](https://appshunter.io/ios/app/2fa-authenticator-code/id6758291742)

This app securely stores and displays one-time verification codes for services like email and social media. It offers quick access to codes with a visual timer and automatic refresh, and supports adding services via QR scan or manual entry. Enhanced security features include optional PIN access and code hiding.

**Highlights:** Stores one-time verification codes, Visual timer for code refresh, Automatic code refresh every 30 seconds, Add services via QR code scan, Add services via manual entry, Optional PIN access for app security, Hide codes on app launch (Premium)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Authenticator Premium | $4.99 | per 7 days |
| 2FA Authenticator Premium | $4.99 | per 7 days |
| 2FA Authenticator Lifetime | $119.99 | one-time |


## Frequently asked questions

### Is Decibel Sound Meter free?

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

### Is 2FA Authenticator Code free?

2FA Authenticator Code is free to download, with in-app purchases available.

### Which has better reviews, Decibel Sound Meter or 2FA Authenticator Code?

2FA Authenticator Code is rated higher. Decibel Sound Meter averages 4.8 out of 5 from 4 ratings, while 2FA Authenticator Code averages 5.0 from 1 ratings.

### Do Decibel Sound Meter or 2FA Authenticator Code have ads?

Decibel Sound Meter shows ads; 2FA Authenticator Code does not.

### Which is updated more often, Decibel Sound Meter or 2FA Authenticator Code?

Decibel Sound Meter ships an update every 4 months, and 2FA Authenticator Code every 5 weeks. Most recently, Decibel Sound Meter was updated on September 18, 2026 and 2FA Authenticator Code on September 12, 2026.

---

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