# Luminosys - Light Meter — A simple, powerful light meter

> Measures ambient light levels in Lux or Foot Candles using a phone's camera. (iPhone/iPad app by Melissa Zwick.)

- Source: https://appshunter.io/ios/app/luminosys-light-meter/id6476405389 (this page in markdown: same URL + `.md`)
- Developer: [Melissa Zwick](https://appshunter.io/developer/1616726350)
- Category: Utilities
- Price: Free
- Rating: 4.43/5 from 7 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 3 MB
- Languages: English
- Released: 2024-01-20
- Data updated: 2026-08-23
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews.md

## What is Luminosys?

Luminosys allows you to accurately measure the ambient light level in Lux or Foot Candles (FC). To do this, Luminosys uses your phone's camera in conjunction with a piece of paper to accurately measure the light level. It is very easy to use and is a great app for those looking for accurate light measurements for photography, comparing light sources, or indoor gardening.

## Key features

- 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

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews.md

### 5/5 — Great for natural light

*2025-12-14*

This free and easy meter matches other meters well for natural light. Fancier meters include an artificial light setting; the artificial setting increases the reading by about 13% vs the natural light setting when measuring artificial light.

### 5/5 — Simple and accurate

*2024-04-11*

I've compared this little app with some other, more "professional" light meter apps and honestly it works just as well. The key, as noted in the notification pop up, is to put a blank piece of white copy paper over the camera lens.

### 5/5 — Light perfect

*2024-04-08*

W app bruv

### 1/5 — Instructions would be nice

*2024-03-12*

The lack of documentation and instructions are detrimental to the proper use of this app.

## Frequently asked questions about Luminosys

### How does Luminosys measure light?

Luminosys uses your phone's camera in conjunction with a piece of paper to accurately measure the ambient light level. It provides readings in both Lux and Foot Candles (FC).

### What is the accuracy of Luminosys?

The app is designed for accurate light measurements. Users have rated it 4.4 stars, indicating a generally positive sentiment regarding its precision for photography and gardening needs.

### Is Luminosys free to use?

Yes, Luminosys is available for free. However, it does contain advertisements to support its development and operation.

### What devices is Luminosys compatible with?

Currently, Luminosys is supported on iPhones. The app is designed for iOS devices.

### What is the age rating for Luminosys?

Luminosys has an age rating of 4+, making it suitable for a wide range of users, including children and adults.

### How often is Luminosys updated?

The latest version of Luminosys is 1.0.1, which was last updated on August 6, 2025. This indicates recent development and potential for ongoing improvements.

### Does Luminosys have ads?

Yes, Luminosys contains advertisements. This is part of its ad-supported monetization model.

### Can Luminosys be used for professional photography?

Luminosys is a great app for those looking for accurate light measurements for photography. While it's a powerful tool, professional photographers may also consider dedicated hardware light meters for highly critical applications.

## Version history (last 2 releases)

### 1.0.1 — 2025-08-06

Improved light level calculation algorithm.

### 1.0 — 2024-01-20

No release notes.

## Apps similar to Luminosys

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Plant Light Meter](https://appshunter.io/ios/app/plant-light-meter/id1213431133) | 4.6 (1,077) | $2.99 | Utilities |
| [Light Meter: Lux-525 Pro](https://appshunter.io/ios/app/light-meter-lux-525-pro/id1636117065) | 4.5 (113) | Free | Utilities |
| [Lux Light Meter for Mobile](https://appshunter.io/ios/app/lux-light-meter-for-mobile/id1638732220) | 4.5 (229) | Free | Utilities |
| [Lux Light Meter Pro](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866) | 3.9 (5,115) | Free | Utilities |
| [Light Meter LM-3000](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761) | 4.5 (2,543) | Free | Utilities |
| [Pocket Lux Meter](https://appshunter.io/ios/app/pocket-lux-meter/id1581308509) | 4.1 (56) | $1.49 | Utilities |

## More apps by Melissa Zwick

- [ABRA: A Better Running App](https://appshunter.io/ios/app/abra-a-better-running-app/id6499472110)
- [OMT Camera](https://appshunter.io/ios/app/omt-camera/id6761876314)

All apps by Melissa Zwick: https://appshunter.io/developer/1616726350

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*