# Authenticator App vs Lux Light Meter

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.

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.

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.

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.

## The numbers

| Metric | Authenticator App | Lux Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/authenticator-app-keyzy/id6748629429/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/lux-light-meter-illuminance/id6790679680/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 7 MB | 4 MB |
| Requires iOS | 17.6 | **17** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [RETRYTECH LLP](https://appshunter.io/developer/1544420363) | [灿耿 陈](https://appshunter.io/developer/1688324562) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-keyzy/id6748629429)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $12.99 | per year |
| Lifetime | $24.99 | one-time |


### Lux Light Meter

[App page](https://appshunter.io/ios/app/lux-light-meter-illuminance/id6790679680)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Annual Subscription | $7.99 | per year |
| Lifetime Access | $4.99 | one-time |


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