# 三思照度计 vs Lux Light Meter · Photometer

The clearest difference is ads: 三思照度计 at none against Lux Light Meter · Photometer's shown. 三思照度计 also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). Lux Light Meter · Photometer's advantage is update cadence (every 4 days vs every 2 weeks). On price and in-app purchases there is nothing between them.

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

三思照度计 ships an update every 2 weeks, Lux Light Meter · Photometer every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 三思照度计 | Lux Light Meter · Photometer |
| --- | --- | --- |
| 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 | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | — | Ad-supported |
| Size | 1 MB | 56 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Shanghai Sansi Electronic Engineering Co., Ltd](https://appshunter.io/developer/965055646) | [Kyu-Hee Jang](https://appshunter.io/developer/1587578867) |

## What reviewers say

### 三思照度计

[App page](https://appshunter.io/ios/app/id6446383682)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 三思照度计 free?

三思照度计 is free to download, with no in-app purchases.

### Is Lux Light Meter · Photometer free?

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

### Do 三思照度计 or Lux Light Meter · Photometer have ads?

Lux Light Meter · Photometer shows ads; 三思照度计 does not.

### Which is updated more often, 三思照度计 or Lux Light Meter · Photometer?

三思照度计 ships an update every 2 weeks, and Lux Light Meter · Photometer every 4 days. Most recently, 三思照度计 was updated on October 30, 2026 and Lux Light Meter · Photometer on October 31, 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.*