# Light Meter LM vs Implify Scan

The clearest difference is in-app purchases: Implify Scan at none against Light Meter LM's 3. Implify Scan also leads on update cadence (fortnightly vs monthly). Light Meter LM's advantage is iOS requirement (15.0 vs 26.0). 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. Implify Scan asks for nothing beyond the download.

Light Meter LM ships an update monthly, Implify Scan fortnightly. The most recent releases landed on October 27, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Light Meter LM | Implify Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.6K ratings)](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761/reviews)** | — |
| Number of ratings | **2.6K** | — |
| Positive reviews | 40.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 20 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) | [Implify](https://appshunter.io/developer/6805092339) |

## 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


### Implify Scan

[App page](https://appshunter.io/ios/app/implify-scan/id6805092337)

**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 Implify Scan free?

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

### Do Light Meter LM or Implify Scan have ads?

Neither Light Meter LM nor Implify Scan shows ads.

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

Light Meter LM ships an update monthly, and Implify Scan fortnightly. Most recently, Light Meter LM was updated on October 27, 2026 and Implify Scan on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*