# Luminometer vs Light Teller

The clearest difference is rating: Light Teller at 5.0 against Luminometer's 4.0. Light Teller also leads on ads (none vs shown). Luminometer's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (13 vs 1). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Luminometer sells 2 in-app purchases, starting at $2.99 per 7 days and Light Teller sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Light Teller holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Luminometer has 13 ratings behind it against 1, so its average is the more settled of the two.

Luminometer ships an update every 2 months, Light Teller every 5 months. The most recent releases landed on June 7, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Luminometer | Light Teller |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (13 ratings)](https://appshunter.io/ios/app/luminometer-lux-light-meter/id6446325225/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/light-teller/id6450953060/reviews)** |
| Number of ratings | **13** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 14 MB | 1 MB |
| Requires iOS | 16.6 | **16.1** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [27GROUP](https://appshunter.io/developer/1589401961) | [佳佳 陶](https://appshunter.io/developer/1682189695) |

## What reviewers say

### Luminometer

[App page](https://appshunter.io/ios/app/luminometer-lux-light-meter/id6446325225)

Transform your device into a professional light meter to measure luminosity in lux and foot-candles. Achieve optimal illumination for any space, from greenhouses to workspaces, ensuring comfort and preventing glare. Calibrated with reference equipment for precise and reliable readings.

**Highlights:** Measures lux and foot-candle units, Internal Exposure Compensation for accuracy, Camera view for measured area, Calibrated with reference equipment, Versatile for various lighting conditions, Helps set optimal illumination levels

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Lifetime | $9.99 | one-time |


### 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 Luminometer free?

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

### Is Light Teller free?

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

### Which has better reviews, Luminometer or Light Teller?

Light Teller is rated higher. Luminometer averages 4.0 out of 5 from 13 ratings, while Light Teller averages 5.0 from 1 ratings.

### Do Luminometer or Light Teller have ads?

Luminometer shows ads; Light Teller does not.

### Which is updated more often, Luminometer or Light Teller?

Luminometer ships an update every 2 months, and Light Teller every 5 months. Most recently, Luminometer was updated on June 7, 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.*