# Light Teller vs 慧标化验

The clearest difference is in-app purchases: 慧标化验 at none against Light Teller's 2. 慧标化验 also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (12.0 vs 16.1). On price, ads and device support there is nothing between them.

Both are free to download. Light Teller sells 2 one-off in-app purchases. 慧标化验 asks for nothing beyond the download.

Light Teller ships an update every 5 months, 慧标化验 every 3 weeks. The most recent releases landed on September 20, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Light Teller | 慧标化验 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/light-teller/id6450953060/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 55 MB |
| Requires iOS | 16.1 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [佳佳 陶](https://appshunter.io/developer/1682189695) | [Beijing Chenglianxin Technology Co., Ltd.](https://appshunter.io/developer/1524912982) |

## What reviewers say

### Light Teller

[App page](https://appshunter.io/ios/app/light-teller/id6450953060)

This app uses your smartphone camera to measure ambient light levels, helping parents ensure their children's study spaces have adequate lighting to protect their vision and reduce myopia risk. It offers clear instructions and educational content on light's impact on eye health.

**Highlights:** Brightness testing with smartphone camera, Light health guidance for parents, Detailed user instructions, Accurate and reliable measurements, Educational articles on visual health

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months Access | $1.99 | one-time |
| 1 Year Access | $4.99 | one-time |


### 慧标化验

[App page](https://appshunter.io/ios/app/id6456400669)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Light Teller free?

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

### Is 慧标化验 free?

慧标化验 is free to download, with no in-app purchases.

### Do Light Teller or 慧标化验 have ads?

Neither Light Teller nor 慧标化验 shows ads.

### Which is updated more often, Light Teller or 慧标化验?

Light Teller ships an update every 5 months, and 慧标化验 every 3 weeks. Most recently, Light Teller was updated on September 20, 2026 and 慧标化验 on October 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.*