# Lux Light Meter Pro vs Light Meter LM

The clearest difference is rating: Light Meter LM at 4.5 against Lux Light Meter Pro's 3.9. Light Meter LM also leads on ads (none vs shown) and review sentiment (40% vs 21%). On price, ratings volume, in-app purchases and monetization model 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 and Light Meter LM sells 3 in-app purchases, starting at $3.49 per month. Whichever you choose, the download price is not the number that matters.

Light Meter LM holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 5.2K and 2.6K respectively. Written reviews point the same way: 21% of Lux Light Meter Pro's written reviews are positive against 40% of Light Meter LM's.

Lux Light Meter Pro ships an update every 3 months, Light Meter LM monthly. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Lux Light Meter Pro | Light Meter LM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (5.2K ratings)](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866/reviews) | **[4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews)** |
| Number of ratings | **5.2K** | 2.6K |
| Positive reviews | 21.2% of reviews | **40.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 19 MB | 22 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) |

## 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


### Light Meter LM

[App page](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761)

Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.

**Highlights:** Measure illuminance (lux/foot-candle), Measure color temperature (Kelvin), Industry-leading accuracy, Pre-calibrated for your device, Low light sensitivity, Save peak reading, Custom calibration option

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Continuous Charging | $3.49 | per month |
| Single Charge | $0.99 | one-time |
| Unlimited Battery | $19.99 | one-time |

**What reviewers like**

- 👍 Great app
- 👍 Accurate measurements
- 👍 Easy to use
- 👍 Helpful customer service
- 👍 Useful for science/research

**What reviewers complain about**

- 🐛 Requires diffuser for accurate readings
- 💰 Expensive for a light meter app
- 🔋 Battery/trial period issues
- 🔍 Inconsistent/inaccurate readings
- 🙄 Misleading/deceptive marketing

**Reported bugs**

- Diffuser not recognized even when used
- App locks up/crashes
- Constant diffuser pop-up interruptions

**Requested features**

- Ability to use rear camera
- More flexible diffuser options
- Improved accuracy without diffuser


## Frequently asked questions

### Is Lux Light Meter Pro free?

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

### Is Light Meter LM free?

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

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

Light Meter LM is rated higher. Lux Light Meter Pro averages 3.9 out of 5 from 5.2K ratings, while Light Meter LM averages 4.5 from 2.6K ratings.

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

Lux Light Meter Pro shows ads; Light Meter LM does not.

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

Lux Light Meter Pro ships an update every 3 months, and Light Meter LM monthly. Most recently, Lux Light Meter Pro was updated on November 11, 2026 and Light Meter LM on November 7, 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.*