# ExView® vs Light Meter LM

The clearest difference is rating: ExView® at 5.0 against Light Meter LM's 4.5. ExView® also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 15.0). Light Meter LM's advantage is update cadence (monthly vs every 6 months) and 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. ExView® asks for nothing beyond the download.

ExView® 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.

ExView® ships an update every 6 months, Light Meter LM monthly. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | ExView® | Light Meter LM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/exview/id1547400277/reviews)** | [4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews) |
| Number of ratings | 1 | **2.6K** |
| Positive reviews | — | 40.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 92 MB | 22 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Extech Instruments Corporation](https://appshunter.io/developer/966942122) | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) |

## What reviewers say

### ExView®

[App page](https://appshunter.io/ios/app/exview/id1547400277)

This app connects to compatible meters to collect, trend, and analyze environmental data remotely. It allows for real-time monitoring, setting alarms, and generating custom PDF reports with photos. Data can be easily shared with team members.

**Highlights:** Remote data collection and trending, Real-time dashboard view, Bluetooth connectivity up to 90m, Programmable high/low alarms, Export data as CSV, Generate custom PDF reports, Attach photos to reports

**In-app purchases:** none


### 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 ExView® free?

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

### Is Light Meter LM free?

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

### Which has better reviews, ExView® or Light Meter LM?

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

### Do ExView® or Light Meter LM have ads?

Neither ExView® nor Light Meter LM shows ads.

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

ExView® ships an update every 6 months, and Light Meter LM monthly. Most recently, ExView® was updated on September 8, 2026 and Light Meter LM on September 23, 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.*