# Light Meter LM vs MadgeTech

The clearest difference is rating: MadgeTech at 5.0 against Light Meter LM's 4.5. MadgeTech also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 15.0). Light Meter LM's advantage is ratings volume (2.6K vs 3). On price, update cadence, 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. MadgeTech asks for nothing beyond the download.

MadgeTech 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 3, so its average is the more settled of the two.

Light Meter LM ships an update monthly, MadgeTech every 5 weeks. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Light Meter LM | MadgeTech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/madgetech/id6468129077/reviews)** |
| Number of ratings | **2.6K** | 3 |
| Positive reviews | 40.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 38 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) | [MadgeTech](https://appshunter.io/developer/1642338175) |

## 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


### MadgeTech

[App page](https://appshunter.io/ios/app/madgetech/id6468129077)

This app enables mobile connectivity and control for specific data loggers. It allows users to program settings, start/stop logging, download data, view historical records, and generate reports, all via Bluetooth. Data can be easily shared through text or email.

**Highlights:** Bluetooth connectivity, Program device settings, Start and stop logging, Download logged data, View historical data, Generate reports, Share data instantly

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

**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 MadgeTech free?

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

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

MadgeTech is rated higher. Light Meter LM averages 4.5 out of 5 from 2.6K ratings, while MadgeTech averages 5.0 from 3 ratings.

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

Neither Light Meter LM nor MadgeTech shows ads.

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

Light Meter LM ships an update monthly, and MadgeTech every 5 weeks. Most recently, Light Meter LM was updated on October 18, 2026 and MadgeTech on October 5, 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.*