# Lux Light Meter · Photometer vs 光量ノート

The clearest difference is in-app purchases: Lux Light Meter · Photometer at none against 光量ノート's 1. Lux Light Meter · Photometer also leads on update cadence (every 4 days vs every 2 months) and iOS requirement (16.4 vs 18.0). 光量ノート's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. 光量ノート sells 1 one-off in-app purchase. Lux Light Meter · Photometer asks for nothing beyond the download.

Lux Light Meter · Photometer ships an update every 4 days, 光量ノート every 2 months. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Lux Light Meter · Photometer | 光量ノート |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/lux-light-meter-photometer/id6759858193/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 55 MB | 2 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) | [Shuhei Yamamoto](https://appshunter.io/developer/1896725589) |

## What reviewers say

### Lux Light Meter · Photometer

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

This tool transforms your iPhone into a precise light meter, offering multiple modes for various environments and photography needs. It records measurement history, allows for notes and comparisons, and supports CSV export for detailed analysis.

**Highlights:** Precise ambient light measurement (lux), Multiple measurement modes (Auto, Outdoor, Indoor, Photo), Measurement history with trend charts, Add notes and favorites to readings, Compare saved readings side-by-side, CSV export for data analysis, EV exposure value for photographers

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

**In-app purchases:** none


### 光量ノート

[App page](https://appshunter.io/ios/app/ppfd/id6799558549)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 光量ノート Pro | $4.99 | one-time |


## Frequently asked questions

### Is Lux Light Meter · Photometer free?

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

### Is 光量ノート free?

光量ノート is free to download, with in-app purchases available.

### Do Lux Light Meter · Photometer or 光量ノート have ads?

Lux Light Meter · Photometer shows ads; 光量ノート does not.

### Which is updated more often, Lux Light Meter · Photometer or 光量ノート?

Lux Light Meter · Photometer ships an update every 4 days, and 光量ノート every 2 months. Most recently, Lux Light Meter · Photometer was updated on October 5, 2026 and 光量ノート on October 15, 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.*