# Lux Light Meter for Mobile vs MobAlerm

The clearest difference is price: Lux Light Meter for Mobile at Free against MobAlerm's $0.49. MobAlerm's advantage is in-app purchases (none vs 7) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

Lux Light Meter for Mobile is free to download; MobAlerm costs $0.49 up front. Lux Light Meter for Mobile sells 7 in-app purchases, starting at $2.99 per 7 days. MobAlerm asks for nothing beyond the download.

Lux Light Meter for Mobile ships an update fortnightly, MobAlerm every 10 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Lux Light Meter for Mobile | MobAlerm |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[4.5 (236 ratings)](https://appshunter.io/ios/app/lux-light-meter-for-mobile/id1638732220/reviews)** | — |
| Number of ratings | **236** | — |
| Positive reviews | 17.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 1 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [WeBrain](https://appshunter.io/developer/1578514377) | [Kengo Tate](https://appshunter.io/developer/1458012620) |

## What reviewers say

### Lux Light Meter for Mobile

[App page](https://appshunter.io/ios/app/lux-light-meter-for-mobile/id1638732220)

This app provides accurate and easy-to-use light measurements in lux and foot candles. It's ideal for photographers, plant owners, and anyone needing to assess ambient light levels in various spaces. Features include real-time color temperature measurement and calculation of the daily light integral.

**Highlights:** Real-time color temperature measurement, Lux and foot candle measurements, Daily light integral (DLI) calculation, Average and Max values, Optimal shooting value selection, Adjustable shooting values (shutter speed, aperture, ISO)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lux Light Meter Pro | $2.99 | per 7 days |
| Light Meter 1 Week | $2.99 | per 7 days |
| Lux Light Meter | $5.99 | per month |
| Light Meter | $5.99 | per month |
| Lux Meter | $7.99 | per year |
| Light Meter Pro | $14.99 | per year |
| Light Meter for Mobile | $14.99 | per year |


### MobAlerm

[App page](https://appshunter.io/ios/app/mobalerm/id6737408995)

**In-app purchases:** none


## Frequently asked questions

### Is Lux Light Meter for Mobile free?

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

### Is MobAlerm free?

MobAlerm costs $0.49, with no in-app purchases.

### Do Lux Light Meter for Mobile or MobAlerm have ads?

Lux Light Meter for Mobile shows ads; MobAlerm does not.

### Which is updated more often, Lux Light Meter for Mobile or MobAlerm?

Lux Light Meter for Mobile ships an update fortnightly, and MobAlerm every 10 days. Most recently, Lux Light Meter for Mobile was updated on October 25, 2026 and MobAlerm 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.*