# Light Meter LM vs FutureVIN

Light Meter LM and FutureVIN are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Light Meter LM sells 3 in-app purchases, starting at $3.49 per month and FutureVIN sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Light Meter LM | FutureVIN |
| --- | --- | --- |
| 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 | 40.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lightray Innovation GmbH](https://appshunter.io/developer/1031383431) | [ISSAC Johnson](https://appshunter.io/developer/1892726054) |

## 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


### FutureVIN

[App page](https://appshunter.io/ios/app/futurevin/id6763794913)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single Engine Report | $2.99 | one-time |
| Unlimited Engine Reports | $29.99 | one-time |


## Frequently asked questions

### Is Light Meter LM free?

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

### Is FutureVIN free?

FutureVIN is free to download, with in-app purchases available.

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

Neither Light Meter LM nor FutureVIN shows ads.

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

Light Meter LM ships an update monthly, and FutureVIN monthly. Most recently, Light Meter LM was updated on October 18, 2026 and FutureVIN on October 6, 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.*