# Light Meter LM vs MES

The clearest difference is rating: MES at 5.0 against Light Meter LM's 4.5. MES also leads on in-app purchases (none vs 3) and update cadence (fortnightly vs monthly). Light Meter LM's advantage is ratings volume (2.6K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Light Meter LM sells 3 in-app purchases, starting at $3.49 per month. MES asks for nothing beyond the download.

MES holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Light Meter LM has 2.6K ratings behind it against 1, so its average is the more settled of the two.

Light Meter LM ships an update monthly, MES fortnightly. The most recent releases landed on October 27, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Light Meter LM | MES |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mes-smart-pro/id6745198529/reviews)** |
| Number of ratings | **2.6K** | 1 |
| Positive reviews | 40.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 45 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) | [Maverickled](https://appshunter.io/developer/1602199192) |

## What reviewers say

### 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


### MES

[App page](https://appshunter.io/ios/app/mes-smart-pro/id6745198529)

This app offers a comprehensive commercial lighting control system using advanced Bluetooth Sig Mesh technology. It creates a secure IoT platform for smart LED products and sensors, enabling data-driven decisions to boost efficiency and cut energy expenses.

**Highlights:** Bluetooth Sig Mesh technology, Secure IoT platform, Smart LED product integration, Embedded sensor support, High-performance data processing, Energy cost reduction

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Light Meter LM free?

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

### Is MES free?

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

### Which has better reviews, Light Meter LM or MES?

MES is rated higher. Light Meter LM averages 4.5 out of 5 from 2.6K ratings, while MES averages 5.0 from 1 ratings.

### Do Light Meter LM or MES have ads?

Neither Light Meter LM nor MES shows ads.

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

Light Meter LM ships an update monthly, and MES fortnightly. Most recently, Light Meter LM was updated on October 27, 2026 and MES on October 12, 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.*