# Lux Light Meter · Photometer vs MarinCompass

The clearest difference is ads: MarinCompass at none against Lux Light Meter · Photometer's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

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

Lux Light Meter · Photometer ships an update every 4 days, MarinCompass weekly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Lux Light Meter · Photometer | MarinCompass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/lux-light-meter-photometer/id6759858193/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Ad-supported | — |
| Size | 56 MB | 1 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) | [YOSHIKAZU OHORI](https://appshunter.io/developer/6772688659) |

## What reviewers say

### Lux Light Meter · Photometer

[App page](https://appshunter.io/ios/app/lux-light-meter-photometer/id6759858193)

Measure light intensity in various units like lux, foot-candles, and EV using your iPhone's camera. It offers features for plant light assessment, historical data tracking, and detailed measurement insights. Ideal for gardeners, photographers, and lighting professionals.

**Highlights:** Measure light in lux, foot-candles, EV, and PPFD, Estimate DLI for plant photoperiods, Four measuring modes: Auto, Outdoor, Indoor, Photo, Automatic reading saving with 7-day trend chart, Add notes and favorites to readings, Export readings as CSV or share as images, Kalman-smoothed readings with min, max, and average

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

**In-app purchases:** none


### MarinCompass

[App page](https://appshunter.io/ios/app/marincompass/id6806538004)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lux Light Meter · Photometer free?

Lux Light Meter · Photometer is free to download, with no in-app purchases.

### Is MarinCompass free?

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

### Do Lux Light Meter · Photometer or MarinCompass have ads?

Lux Light Meter · Photometer shows ads; MarinCompass does not.

### Which is updated more often, Lux Light Meter · Photometer or MarinCompass?

Lux Light Meter · Photometer ships an update every 4 days, and MarinCompass weekly. Most recently, Lux Light Meter · Photometer was updated on October 31, 2026 and MarinCompass on October 29, 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.*