# Luminometer vs WS Authenticator

The clearest difference is in-app purchases: WS Authenticator at none against Luminometer's 2. WS Authenticator also leads on ads (none vs shown). Luminometer's advantage is iOS requirement (16.6 vs 18.2). On price, update cadence and device support there is nothing between them.

Both are free to download. Luminometer sells 2 in-app purchases, starting at $2.99 per 7 days. WS Authenticator asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 27, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Luminometer | WS Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (13 ratings)](https://appshunter.io/ios/app/luminometer-lux-light-meter/id6446325225/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 9 MB |
| Requires iOS | **16.6** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [27GROUP](https://appshunter.io/developer/1589401961) | [WebSchool.au Pty Ltd](https://appshunter.io/developer/1231325044) |

## What reviewers say

### Luminometer

[App page](https://appshunter.io/ios/app/luminometer-lux-light-meter/id6446325225)

Transform your device into a professional light meter to measure luminosity in lux and foot-candles. Achieve optimal illumination for any space, from greenhouses to workspaces, ensuring comfort and preventing glare. Calibrated with reference equipment for precise and reliable readings.

**Highlights:** Measures lux and foot-candle units, Internal Exposure Compensation for accuracy, Camera view for measured area, Calibrated with reference equipment, Versatile for various lighting conditions, Helps set optimal illumination levels

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Lifetime | $9.99 | one-time |


### WS Authenticator

[App page](https://appshunter.io/ios/app/ws-authenticator/id6747866858)

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

**In-app purchases:** none


## Frequently asked questions

### Is Luminometer free?

Luminometer is free to download, with in-app purchases available.

### Is WS Authenticator free?

WS Authenticator is free to download, with no in-app purchases.

### Do Luminometer or WS Authenticator have ads?

Luminometer shows ads; WS Authenticator does not.

### Which is updated more often, Luminometer or WS Authenticator?

Luminometer ships an update every 2 months, and WS Authenticator every 2 months. Most recently, Luminometer was updated on September 27, 2026 and WS Authenticator on October 6, 2026.

---

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