# Atomos RX vs Illuminance Meter

The clearest difference is in-app purchases: Atomos RX at none against Illuminance Meter's 3. Atomos RX also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Illuminance Meter's advantage is update cadence (every 3 months vs every 12 months). On price, review sentiment and ads there is nothing between them.

Both are free to download. Illuminance Meter sells 3 in-app purchases, starting at $3.99 per 7 days. Atomos RX asks for nothing beyond the download.

Atomos RX ships an update every 12 months, Illuminance Meter every 3 months. The most recent releases landed on October 30, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Atomos RX | Illuminance Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/atomos-rx/id6745767436/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 13 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Atomos Ltd.](https://appshunter.io/developer/1468547360) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### Atomos RX

[App page](https://appshunter.io/ios/app/atomos-rx/id6745767436)

Turn your mobile device into a professional video monitor. Stream live feeds from compatible hardware to up to four devices simultaneously for real-time viewing.

**Highlights:** Real-time video monitoring, Multi-device support (up to 4), Professional-grade performance, Intuitive interface, Seamless integration with Atomos TX

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

**In-app purchases:** none


### Illuminance Meter

[App page](https://appshunter.io/ios/app/illuminance-meter-lux-ppfd/id6759972986)

Transform your iPhone into a professional light meter to measure illuminance in lux or foot-candles. Ideal for photographers, plant enthusiasts, and workplace safety, it provides instant, accurate light readings with various specialized modes and data export options.

**Highlights:** Real-time lux measurement with live gauge, Photography mode for exposure value (EV) calculation, Plant light mode with recommendations, Workplace standards verification, Measurement history with export options, Spectrum analysis for color temperature and CRI, Multiple illuminance unit switching

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $3.99 | per 7 days |
| Premium Yearly | $19.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Atomos RX free?

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

### Is Illuminance Meter free?

Illuminance Meter is free to download, with in-app purchases available.

### Do Atomos RX or Illuminance Meter have ads?

Neither Atomos RX nor Illuminance Meter shows ads.

### Which is updated more often, Atomos RX or Illuminance Meter?

Atomos RX ships an update every 12 months, and Illuminance Meter every 3 months. Most recently, Atomos RX was updated on October 30, 2026 and Illuminance Meter on November 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.*