# Lux Light Meter Pro vs Luminosys

The clearest difference is review sentiment: Luminosys at 75% against Lux Light Meter Pro's 21%. Luminosys also leads on rating (4.4 vs 3.9) and in-app purchases (none vs 4). Lux Light Meter Pro's advantage is update cadence (every 3 months vs every 19 months) and ratings volume (5.1K vs 7). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Lux Light Meter Pro sells 3 in-app purchases, starting at $1.99 per month. Luminosys asks for nothing beyond the download.

Luminosys holds the better App Store score, 4.4 against 3.9. That said, the two scores are not equally well evidenced: Lux Light Meter Pro has 5.1K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 21% of Lux Light Meter Pro's written reviews are positive against 75% of Luminosys's.

Lux Light Meter Pro ships an update every 3 months, Luminosys every 19 months. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Lux Light Meter Pro | Luminosys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (5.1K ratings)](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** |
| Number of ratings | **5.1K** | 7 |
| Positive reviews | 21.3% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 19 MB | 3 MB |
| Requires iOS | **15** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) | [Melissa Zwick](https://appshunter.io/developer/1616726350) |

## What reviewers say

### Lux Light Meter Pro

[App page](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866)

Measure light intensity in lux and foot candles with this 2-in-1 meter. Optimize photography settings, adjust indoor lighting, or prevent eye strain with professional-quality readings directly from your smartphone.

**Highlights:** Real-time lux and foot candle measurements, Real-time color temperature measurements, Real-time histogram plotting, Customizable settings for shutter speed, ISO, aperture, Front and back camera support, Intuitive and customizable controls

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per month |
| Premium Access | $14.99 | per year |
| Pro Mode | $9.99 | one-time |

**What reviewers like**

- 🚀 Simple and straightforward
- 👍 Useful for measuring light levels
- 🔍 Provides general lux measurements

**What reviewers complain about**

- 🐛 Inaccurate and inconsistent readings
- 🔍 Limited functionality compared to professional light meters
- 💰 Requires subscription for full features
- 🤖 Glitchy and non-responsive at times

**Reported bugs**

- Readings stuck at 0 lux regardless of light conditions
- Frequent crashes and freezes
- Inability to switch between front and rear cameras

**Requested features**

- Ability to save and review past measurements
- More detailed instructions and guidance on proper usage
- Improved accuracy and calibration options


### Luminosys

[App page](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389)

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

**Highlights:** Measures light in Lux, Measures light in Foot Candles (FC), Uses phone camera for accuracy, Easy to use interface, Suitable for photography, Useful for indoor gardening

**In-app purchases:** none


## Frequently asked questions

### Is Lux Light Meter Pro free?

Lux Light Meter Pro is free to download, with in-app purchases available.

### Is Luminosys free?

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

### Which has better reviews, Lux Light Meter Pro or Luminosys?

Luminosys is rated higher. Lux Light Meter Pro averages 3.9 out of 5 from 5.1K ratings, while Luminosys averages 4.4 from 7 ratings.

### Do Lux Light Meter Pro or Luminosys have ads?

Both Lux Light Meter Pro and Luminosys show ads.

### Which is updated more often, Lux Light Meter Pro or Luminosys?

Lux Light Meter Pro ships an update every 3 months, and Luminosys every 19 months. Most recently, Lux Light Meter Pro was updated on September 24, 2026 and Luminosys on September 20, 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.*