Comparison

Decibel Meter Plus Pro vs Authenticator App

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

Head to head
About

Decibel Meter Plus Pro

Measure the sound levels around you with this utility app. It displays average, peak, and max values, offers decibel exposure time guidelines, and provides information on noise-induced hearing loss. The app also allows data recording and export for analysis.

Highlights
  • Measure sound levels
  • Display average, peak, and max values
  • Decibel exposure time guidelines
  • Information on noise-induced hearing loss
  • Record and export data
  • Calibrate measurements
  • Universal app support
Features
Read full description

Decibel Meter Plus Pro turns your iPhone or iPad into a clean and easy-to-use sound level meter. Measure the noise around you in real time, view current, average, max, and peak dB readings, save measurement sessions, and export reports when you need to keep a record. Whether you want to check a quiet room, monitor everyday environmental noise, compare sound levels over time, or save a simple noise report, Decibel Meter Plus Pro gives you a clear and modern way to do it. KEY FEATURES • Real-time decibel meter View live sound levels with a large, easy-to-read meter. • Current, average, max, and peak values Quickly understand how sound levels change during a measurement session. • Live noise trend See noise changes over time instead of relying on a single number. • Save measurement sessions Keep useful sound level records for later review. • Session history Browse saved sessions with date, duration, average level, max level, and noise category. • Session reports Review key sound level stats, noise trend charts, location notes, and report details. • Export & share reports Export saved reports as an image, PDF, or CSV file. A limited number of free report exports is included. Unlock Unlimited Reports with a one-time purchase for unlimited exports. • Optional location saving Save location information only with sessions you manually save. • Calibration Adjust readings to better match a reference sound meter. • Noise level guide Learn common sound levels and tips for better measurements. • iPhone and iPad support Enjoy a redesigned interface that works beautifully on both iPhone and iPad. • 30+ languages The app is now localized for users around the world. • Privacy-friendly design Audio is processed on your device and is not uploaded. UNLIMITED REPORTS Unlimited Reports is an optional one-time unlock for users who want unlimited image, PDF, and CSV report exports. No subscription is required. SUPPORT If you have questions, feedback, or need help with purchases or report exports, please contact us at: ipixeltech@gmail.com IMPORTANT NOTE Decibel Meter Plus Pro uses the built-in microphone on your device. Readings are intended for general reference and everyday noise checks. For certified workplace testing, legal compliance, or professional acoustic measurement, please use certified sound level equipment.

About

Authenticator App

This app generates secure, offline two-factor authentication codes for all your major online accounts. It offers iCloud sync for Apple devices and allows for easy organization and deletion of codes. Upgrade for unlimited accounts and advanced categorization.

Highlights
  • Supports major platforms (Google, Instagram, Facebook, GitHub)
  • Import 2FA codes from screenshots
  • iCloud Sync across Apple devices
  • Organize codes into categories
  • Private and offline code storage
  • Generates TOTP codes securely
Features
Read full description

Key Features: - Supports all major platforms – Seamlessly works with Google, Instagram, Facebook, GitHub, and others. - Scan QR from image – Easily import 2FA codes from screenshots or saved photos. - iCloud Sync – Securely sync your 2FA codes across all your Apple devices. - Organize your codes – Sort accounts into categories and keep everything tidy. - Swipe to delete – Clean up unused codes with a quick swipe. - Private & offline – Your codes are stored locally on your device — never uploaded. - Built for simplicity, speed, and security, Keyzy Authenticator generates TOTP codes safely and offline. Unlock More Power: Add up to 2 accounts for free. Upgrade with a one-time purchase to unlock unlimited accounts and organize them into categories. Whether you’re a developer, social media user, or just someone who cares about account security, Keyzy Authenticator: 2fa is the must-have tool to keep your digital life protected. Privacy Policy: https://sites.google.com/view/2facodeauthenticator-privacy Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Decibel Meter Plus Pro4 screens
Authenticator App4 screens

Verdict

The call

The clearest difference is price: Authenticator App at Free against Decibel Meter Plus Pro's $0.99. Authenticator App also leads on rating (5.0 vs 3.8) and update cadence (every 2 weeks vs every 2 months). Decibel Meter Plus Pro's advantage is ratings volume (80 vs 2) and iOS requirement (15.0 vs 17.6). On ads, in-app purchases and device support 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

Authenticator App is free to download; Decibel Meter Plus Pro costs $0.99 up front. Decibel Meter Plus Pro sells 1 one-off in-app purchase and Authenticator App sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Authenticator App holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Decibel Meter Plus Pro has 80 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Decibel Meter Plus Pro ships an update every 2 months, Authenticator App every 2 weeks. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
Decibel Meter Plus Pro versus Authenticator App: the parameters behind the verdict, then further details
ParameterDecibel Meter Plus ProAuthenticator App
Price$0.99Free — better
Rating3.8 (80 ratings)5.0 (2 ratings) — better
Positive reviews52.4% of reviews—
Number of ratings80 — better2
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size12 MB7 MB
Age rating4+4+
Developer华芳 张RETRYTECH LLP

Customer experience

Decibel Meter Plus Pro

All ratings80 ratings
Positive71.3%
Neutral3.8%
Negative25.0%
Written reviews126 reviews
Positive52.4%
Neutral7.9%
Negative39.7%

Authenticator App

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Decibel Meter Plus Pro

One-time1
  • Unlimited Reports$2.99
3 purchases

Authenticator App

Subscriptions2
  • Monthly$3.991 Month
  • Yearly3 Days trial$12.991 Year
One-time1
  • Lifetime$24.99

Questions

Is Decibel Meter Plus Pro free?
Decibel Meter Plus Pro costs $0.99, and also offers in-app purchases.
Is Authenticator App free?
Authenticator App is free to download, with in-app purchases available.
Which has better reviews, Decibel Meter Plus Pro or Authenticator App?
Authenticator App is rated higher. Decibel Meter Plus Pro averages 3.8 out of 5 from 80 ratings, while Authenticator App averages 5.0 from 2 ratings.
Do Decibel Meter Plus Pro or Authenticator App have ads?
Neither Decibel Meter Plus Pro nor Authenticator App shows ads.
Which is updated more often, Decibel Meter Plus Pro or Authenticator App?
Decibel Meter Plus Pro ships an update every 2 months, and Authenticator App every 2 weeks. Most recently, Decibel Meter Plus Pro was updated on September 21, 2026 and Authenticator App on September 23, 2026.

Other comparisons