# 三思照度计 vs Light Meter

The clearest difference is in-app purchases: 三思照度计 at none against Light Meter's 3. 三思照度计 also leads on update cadence (every 2 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Light Meter sells 3 in-app purchases, starting at $9.00 per 7 days. 三思照度计 asks for nothing beyond the download.

三思照度计 ships an update every 2 weeks, Light Meter every 6 weeks. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 三思照度计 | Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/light-meter-lux-light-meter/id6751223352/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 13 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Sansi Electronic Engineering Co., Ltd](https://appshunter.io/developer/965055646) | [琦 崔](https://appshunter.io/developer/1831666610) |

## What reviewers say

### 三思照度计

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Light Meter

[App page](https://appshunter.io/ios/app/light-meter-lux-light-meter/id6751223352)

This tool precisely measures light intensity in Lux and Footcandles, offering data for photography, plant care, and environmental analysis. It provides photography recommendations and generates data reports for various applications.

**Highlights:** Multi-mode metering system, Real-time color temperature capture, Photography decision engine, Plant cultivation light monitoring, Space optimization analysis, Data report generation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly membership | $9.00 | per 7 days |
| Annual Membership | $14.99 | one-time |
| Lifetime membership | $29.99 | one-time |


## 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 Light Meter free?

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

### Do 三思照度计 or Light Meter have ads?

Neither 三思照度计 nor Light Meter shows ads.

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

三思照度计 ships an update every 2 weeks, and Light Meter every 6 weeks. Most recently, 三思照度计 was updated on September 9, 2026 and Light Meter on September 10, 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.*