Comparison

2FA Authenticator (2FAS) vs Decibel Meter Sound Detector

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

2FA Authenticator (2FAS)

Securely log in to your online accounts with two-factor authentication. This app protects your personal data and passwords from cyber threats with a simple, private, and open-source solution. It offers easy token restoration, app protection, and offline functionality.

Highlights
  • Two-factor authentication
  • Token backup and restore
  • App protection with passcode/biometrics
  • Open-source and transparent
  • Offline functionality
  • Cross-device sync
  • One-tap authentication with browser extensions
Features
Read full description

2FAS is the easiest way to enable two-factor authentication (or multi-factor authentication) to verify your identity and securely log in to accounts to keep your personal data and passwords protected from cyber threats — all from one app, 100% free! The world’s most secure, private, and simple 2FA app. Secure: • Easily restore your tokens with backups. • Add app protection with your passcode or biometrics. • 2FAS is open-source, transparent, and community-driven. Simple: • 2FAS syncs across your mobile devices. • An interface designed for simplicity. • One-tap authentication with 2FAS Browser Extensions. • Multi-language support. • Quick guides for setup and support. Private: • 2FAS works offline. • 2FAS doesn't store any passwords or metadata. • 100% anonymous use, no account required. It’s not too late to protect your data, so what are you waiting for? Protect your online accounts and services now with TOTP and HOTP algorithms. Start using the 2FAS authenticator app today! If you have any questions, talk with us on our Discord server: https://discord.gg/q4cP6qh2g5 Learn more about 2FAS: • Check our GitHub repository: https://github.com/twofas • Visit our website at: https://2fas.com/ • Follow us on X: https://x.com/2FAS_com • Subscribe on YouTube: https://www.youtube.com/@2FAS

About

Decibel Meter Sound Detector

Monitor your surroundings with this decibel meter app. It measures sound levels in real-time, providing clear visual analysis and advanced filtering options. Easily share your readings for documentation or further analysis.

Highlights
  • Real-time decibel (dB) readings
  • Frequency weighting (A, B, C, Z)
  • Share measurements via various apps
  • 1/3 octave band frequency analysis
  • Display current, average, and max values
  • Advanced filter range settings
Features
Read full description

Track Environmental Noise with Ease Monitor your surroundings with this professional-grade decibel meter app, featuring clear visual noise analysis. The Decibel Meter app uses your device’s built-in microphone to measure sound levels in decibels (dB), offering real-time audio frequency (AF) and dB readings. It supports advanced filtering for frequency and dB ranges. You can easily share your measurements via Messages, Email, WhatsApp, Notes, and more for further analysis or documentation. Note: The app’s accuracy is limited by your device’s microphone capabilities and is not intended to replace professional-grade sound meters. The audible frequency range is from 20 Hz to 20,000 Hz. For additional information and comments, please contact info@ashiers.com. FEATURES: - Accurate measurements - Frequency Weighting: A, B, C, Z - Share readings via Email, Message, Notes, WhatsApp, and more - 1/3 octave band frequency analysis - 20 to 130 dB - Audible frequency range: 20 Hz to 20,000 Hz - Intuitive design - Advanced filter range with time-in/time-out settings - Display current, average, and maximum values - Display peak frequency

Screenshots

2FA Authenticator (2FAS)4 screens
Decibel Meter Sound Detector4 screens

Verdict

The call

The clearest difference is in-app purchases: 2FA Authenticator (2FAS) at none against Decibel Meter Sound Detector's 6. Decibel Meter Sound Detector's advantage is iOS requirement (14.0 vs 18.6). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Decibel Meter Sound Detector sells 6 one-off in-app purchases. 2FA Authenticator (2FAS) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for 2FA Authenticator (2FAS) against 4.7 for Decibel Meter Sound Detector. Both are backed by a comparable volume of ratings — 36K and 56K respectively. Written reviews are what separate them: 77% of 2FA Authenticator (2FAS)'s written reviews are positive against 79% of Decibel Meter Sound Detector's.

UpkeepUpdate frequency

2FA Authenticator (2FAS) ships an update monthly, Decibel Meter Sound Detector every 5 weeks. Both last shipped on October 26, 2026.

Scorecard3 real differences · 7 level
2FA Authenticator (2FAS) versus Decibel Meter Sound Detector: the parameters behind the verdict, then further details
Parameter2FA Authenticator (2FAS)Decibel Meter Sound Detector
PriceFreeFree
Rating4.7 (36K ratings) — better4.7 (56K ratings)
Positive reviews77.3% of reviews78.7% of reviews — better
Number of ratings36K56K — better
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.614.0 — better
Further details — not scored
Size81 MB20 MB
Age rating4+4+
DeveloperTwo Factor Authentication Service Inc.Ashraf Thoppukadavil

Customer experience

2FA Authenticator (2FAS)

All ratings35,640 ratings
Positive93.1%
Neutral2.1%
Negative4.8%
Written reviews724 reviews
Positive77.3%
Neutral5.4%
Negative17.3%

Decibel Meter Sound Detector

All ratings54,030 ratings
Positive93.2%
Neutral3.7%
Negative3.1%
Written reviews423 reviews
Positive78.7%
Neutral4.5%
Negative16.8%

User reviews

2FA Authenticator (2FAS)

From 36K App Store ratings

What we love

  • 🚀 Efficient and fast
  • 🔒 Secure and private
  • 👍 Simple and intuitive UI
  • 💡 Customizable icons and folders
  • 🔒 iCloud backup and sync

Room to improve

  • 🐛 Occasional bugs and crashes
  • 🔒 Lack of password/PIN protection
  • 🕰 No Apple Watch app
  • 🐛 Issues with push notifications
  • 🕰 Missing desktop/web app

Decibel Meter Sound Detector

From 56K App Store ratings

What we love

  • 👍 No bloatware
  • 👍 Quite useful
  • 👍 Excellent and useful app
  • 👍 Easy to use
  • 👍 Simple, clear and accurate

Room to improve

  • 🐛 Ads block settings
  • 🐛 Inaccurate readings
  • 🐛 Not sensitive at all
  • 🐛 Dangerously inaccurate
  • 🐛 Unable to record continuously

Bugs and requests

2FA Authenticator (2FAS)

Reported bugs

3 issues
  • Tokens disappearing after device changes
  • Push notification failures
  • Incompatibility with older devices

Requested features

5 requests
  • Alphanumeric passcode option
  • Custom icon uploads
  • Apple Watch app
  • Desktop/web app
  • Improved support and communication

Decibel Meter Sound Detector

Reported bugs

4 issues
  • Analyze feature is broken
  • Analyze feature has backwards time axis
  • Repeatedly prompts to paste from clipboard
  • Freezes after a few seconds of use

Requested features

7 requests
  • Ability to name or add notes to recordings
  • Option to specify microphone to use
  • Ability to stop and start new recordings without closing app
  • Landscape mode
  • Calibration against professional equipment
Show 2 more
  • Audible alarm for reaching set decibel level
  • Display full date and time on recordings

In-app purchases

None

2FA Authenticator (2FAS)

No in-app purchases

6 purchases

Decibel Meter Sound Detector

One-time6
  • Decibel Meter$1.99
  • Decibel Meter Premium$4.99
  • Decibel Meter$4.99
Show 3 more
  • Decibel Meter$9.99
  • Decibel Meter$19.99
  • Decibel Meter$29.99

Questions

Is 2FA Authenticator (2FAS) free?
2FA Authenticator (2FAS) is free to download, with no in-app purchases.
Is Decibel Meter Sound Detector free?
Decibel Meter Sound Detector is free to download, with in-app purchases available.
Which has better reviews, 2FA Authenticator (2FAS) or Decibel Meter Sound Detector?
2FA Authenticator (2FAS) is rated higher. 2FA Authenticator (2FAS) averages 4.7 out of 5 from 36K ratings, while Decibel Meter Sound Detector averages 4.7 from 56K ratings.
Do 2FA Authenticator (2FAS) or Decibel Meter Sound Detector have ads?
Neither 2FA Authenticator (2FAS) nor Decibel Meter Sound Detector shows ads.
Which is updated more often, 2FA Authenticator (2FAS) or Decibel Meter Sound Detector?
2FA Authenticator (2FAS) ships an update monthly, and Decibel Meter Sound Detector every 5 weeks. Most recently, 2FA Authenticator (2FAS) was updated on October 26, 2026 and Decibel Meter Sound Detector on October 26, 2026.

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