Comparison

Authenticator App vs Lux Light Meter

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

Head to head
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/

About

Lux Light Meter

Measure ambient light levels with your iPhone. Get real-time lux and foot-candle readings, with specialized modes for photography and plant care. Track light history and calibrate for accuracy.

Highlights
  • Ambient light metering (lux/fc)
  • Photography exposure suggestions
  • Plant light (PPFD/DLI) estimation
  • Continuous measurement and history
  • Optional meter calibration
  • Privacy-friendly local storage
Features
Read full description

Lux Light Meter: Illuminance A practical lux and illuminance meter for iPhone. Measure ambient light in seconds, check if a room is bright enough for study, work, or home use, and get helpful exposure and plant-lighting guidance when you need it. Core metering works offline. Key Features: Ambient light metering - Live lux / fc readings with scene targets that tell you if the light is too dim, about right, or too bright — plus simple tips to adjust Photography mode (Pro) - Aperture- or shutter-priority suggestions with ISO and exposure compensation so you can dial in exposure faster Plant mode (Pro) - Estimate PPFD and DLI for common houseplants, with light source and daily photoperiod options Continuous measure & history - Save single readings, track how light changes over time, and review min, average, and max values Optional calibration - Fine-tune against a trusted meter; Pro saves separate factors for the front and rear cameras Units & privacy-friendly storage - Switch between lux and fc; your measurements stay on your device How to Use: Open the app, allow camera access, and point your iPhone at the area you want to measure. Switch between Environment, Photography, and Plant modes, then save a reading or run a continuous measurement when you need a longer sample. Subscription Options: * Weekly and yearly subscriptions, plus a lifetime purchase * Payment will be charged to your Apple ID account * Subscriptions renew automatically within 24 hours before the current period ends * Manage or cancel anytime in your Account Settings Clearer readings. Better light decisions. Terms of Use: https://lightmeter.xzonesoft.com/terms.html Privacy Policy: https://lightmeter.xzonesoft.com/privacy.html Contact Us: support@xzonesoft.com

Screenshots

Authenticator App4 screens
Lux Light Meter3 screens

Verdict

The call

Authenticator App and Lux Light Meter are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Authenticator App sells 3 in-app purchases, starting at $3.99 per month and Lux Light Meter sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Authenticator App against 5.0 for Lux Light Meter. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

Authenticator App ships an update every 2 weeks, Lux Light Meter fortnightly. The most recent releases landed on September 23, 2026 and October 8, 2026 respectively.

ScorecardNo meaningful differences
Authenticator App versus Lux Light Meter: the parameters behind the verdict, then further details
ParameterAuthenticator AppLux Light Meter
PriceFreeFree
Rating5.0 (2 ratings)5.0 (5 ratings)
Positive reviews—100.0% of reviews
Number of ratings25 — better
Update frequencyEvery 2 weeks — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617 — better
Further details — not scored
Size7 MB4 MB
Age rating4+4+
DeveloperRETRYTECH LLP灿耿 陈

Customer experience

Authenticator App

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

Lux Light Meter

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Authenticator App

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

Lux Light Meter

Subscriptions2
  • Weekly Access$1.997 Days
  • Annual Subscription$7.991 Year
One-time1
  • Lifetime Access$4.99

Questions

Is Authenticator App free?
Authenticator App is free to download, with in-app purchases available.
Is Lux Light Meter free?
Lux Light Meter is free to download, with in-app purchases available.
Which has better reviews, Authenticator App or Lux Light Meter?
Authenticator App and Lux Light Meter are both rated 5.0 out of 5 on the App Store, from 2 and 5 ratings respectively.
Do Authenticator App or Lux Light Meter have ads?
Neither Authenticator App nor Lux Light Meter shows ads.
Which is updated more often, Authenticator App or Lux Light Meter?
Authenticator App ships an update every 2 weeks, and Lux Light Meter fortnightly. Most recently, Authenticator App was updated on September 23, 2026 and Lux Light Meter on October 8, 2026.

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