# Luminosys vs Mach Mobile Alerting

The clearest difference is ads: Mach Mobile Alerting at none against Luminosys's shown. Mach Mobile Alerting also leads on update cadence (every 2 months vs every 19 months). On price, in-app purchases, device support 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.

Luminosys ships an update every 19 months, Mach Mobile Alerting every 2 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Luminosys | Mach Mobile Alerting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (10 ratings)](https://appshunter.io/ios/app/luminosys-light-meter/id6476405389/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 19 months | **Every 2 months** |
| Monetization | Ad-supported | — |
| Size | 3 MB | 47 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Melissa Zwick](https://appshunter.io/developer/1616726350) | [Mach Alert Inc.](https://appshunter.io/developer/1472612618) |

## 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


### Mach Mobile Alerting

[App page](https://appshunter.io/ios/app/mach-mobile-alerting/id6762401418)

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

**In-app purchases:** none


## Frequently asked questions

### Is Luminosys free?

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

### Is Mach Mobile Alerting free?

Mach Mobile Alerting is free to download, with no in-app purchases.

### Do Luminosys or Mach Mobile Alerting have ads?

Luminosys shows ads; Mach Mobile Alerting does not.

### Which is updated more often, Luminosys or Mach Mobile Alerting?

Luminosys ships an update every 19 months, and Mach Mobile Alerting every 2 months. Most recently, Luminosys was updated on October 24, 2026 and Mach Mobile Alerting on October 11, 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.*