# Luminosys vs Light Meter.

The clearest difference is in-app purchases: Luminosys at none against Light Meter.'s 1. Light Meter.'s advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 19 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Light Meter. sells 1 one-off in-app purchase. Luminosys asks for nothing beyond the download.

Luminosys ships an update every 19 months, Light Meter. every 6 weeks. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Luminosys | Light Meter. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** | — |
| Number of ratings | **7** | — |
| 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 | — |
| Size | 3 MB | 1 MB |
| Requires iOS | **16.0** | 17.2 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Melissa Zwick](https://appshunter.io/developer/1616726350) | [Muhammed Efdal incesu](https://appshunter.io/developer/1748859357) |

## 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/id6651860748)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Light Meter Lifetime Premium | $2.99 | 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.

### 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 September 20, 2026 and Light Meter. on September 13, 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.*