# 眼健康 vs Light Teller

The clearest difference is in-app purchases: 眼健康 at none against Light Teller's 2. 眼健康 also leads on update cadence (every 4 weeks vs every 5 months) and iOS requirement (9.0 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. 眼健康 asks for nothing beyond the download.

眼健康 ships an update every 4 weeks, Light Teller every 5 months. The most recent releases landed on October 26, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 眼健康 | Light Teller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/light-teller/id6450953060/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | — | Free with in-app purchases |
| Size | 27 MB | 1 MB |
| Requires iOS | **9.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Tianjin Suowei Electronic Technology Co .,Ltd](https://appshunter.io/developer/990160474) | [佳佳 陶](https://appshunter.io/developer/1682189695) |

## What reviewers say

### 眼健康

[App page](https://appshunter.io/ios/app/id1289598828)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 眼健康 free?

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

### Is Light Teller free?

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

### Do 眼健康 or Light Teller have ads?

Neither 眼健康 nor Light Teller shows ads.

### Which is updated more often, 眼健康 or Light Teller?

眼健康 ships an update every 4 weeks, and Light Teller every 5 months. Most recently, 眼健康 was updated on October 26, 2026 and Light Teller on September 20, 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.*