# Luminosys vs Light Meter

The clearest difference is rating: Luminosys at 4.3 against Light Meter's 3.6. Luminosys also leads on in-app purchases (none vs 3). Light Meter's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 19 months). On price, ratings volume and device support there is nothing between them.

Both are free to download. Light Meter sells 3 in-app purchases, starting at $9.00 per 7 days. Luminosys asks for nothing beyond the download.

Luminosys holds the better App Store score, 4.3 against 3.6. Both are backed by a comparable volume of ratings — 10 and 15 respectively.

Luminosys ships an update every 19 months, Light Meter every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Luminosys | Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** | [3.6 (15 ratings)](https://appshunter.io/ios/app/light-meter-lux-light-meter/id6751223352/reviews) |
| Number of ratings | 10 | **15** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 6 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 3 MB | 13 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Melissa Zwick](https://appshunter.io/developer/1616726350) | [琦 崔](https://appshunter.io/developer/1831666610) |

## What reviewers say

### Luminosys

[App page](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389)

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

**Highlights:** Measures light in Lux, Measures light in Foot Candles (FC), Uses phone camera for accuracy, Easy to use interface, Suitable for photography, Useful for indoor gardening

**In-app purchases:** none


### Light Meter

[App page](https://appshunter.io/ios/app/light-meter-lux-light-meter/id6751223352)

This tool precisely measures light intensity in Lux and Footcandles, offering data for photography, plant care, and environmental analysis. It provides photography recommendations and generates data reports for various applications.

**Highlights:** Multi-mode metering system, Real-time color temperature capture, Photography decision engine, Plant cultivation light monitoring, Space optimization analysis, Data report generation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly membership | $9.00 | per 7 days |
| Annual Membership | $14.99 | one-time |
| Lifetime membership | $29.99 | one-time |


## Frequently asked questions

### Is Luminosys free?

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

### Is Light Meter free?

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

### Which has better reviews, Luminosys or Light Meter?

Luminosys is rated higher. Luminosys averages 4.3 out of 5 from 10 ratings, while Light Meter averages 3.6 from 15 ratings.

### Do Luminosys or Light Meter have ads?

Luminosys shows ads; Light Meter does not.

### Which is updated more often, Luminosys or Light Meter?

Luminosys ships an update every 19 months, and Light Meter every 6 weeks. Most recently, Luminosys was updated on October 24, 2026 and Light Meter on October 25, 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.*