# Luminosys vs Lumen

The clearest difference is rating: Lumen at 5.0 against Luminosys's 4.3. Lumen also leads on ads (none vs shown) and update cadence (every 5 days vs every 19 months). Luminosys's advantage is ratings volume (10 vs 1). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lumen holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Luminosys has 10 ratings behind it against 1, so its average is the more settled of the two.

Luminosys ships an update every 19 months, Lumen every 5 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Luminosys | Lumen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (10 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lumen-light-reports/id6811426450/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 5 days** |
| Monetization | Ad-supported | **Free** |
| Size | 3 MB | 39 MB |
| Requires iOS | 16.0 | **15.4** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Melissa Zwick](https://appshunter.io/developer/1616726350) | [Julian Cousineau](https://appshunter.io/developer/6811426452) |

## 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


### Lumen

[App page](https://appshunter.io/ios/app/lumen-light-reports/id6811426450)

This app assists community inspection teams in identifying and documenting lighting issues. It allows users to record observations, attach photos, and send coordinated reports for repairs. The app synchronizes data across connected devices for team collaboration.

**Highlights:** Record lighting issues with notes and photos, Submit coordinated reports for repairs, Synchronize inspection data across team devices, View reported issues organized by location, Apple Watch companion for guidance and logging

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Luminosys free?

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

### Is Lumen free?

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

### Which has better reviews, Luminosys or Lumen?

Lumen is rated higher. Luminosys averages 4.3 out of 5 from 10 ratings, while Lumen averages 5.0 from 1 ratings.

### Do Luminosys or Lumen have ads?

Luminosys shows ads; Lumen does not.

### Which is updated more often, Luminosys or Lumen?

Luminosys ships an update every 19 months, and Lumen every 5 days. Most recently, Luminosys was updated on October 24, 2026 and Lumen on October 7, 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.*