# Light Teller — Quick and Easy Lux Meter > Smartphone camera lux meter for child eye health and study environment optimization. (iPhone/iPad app by 佳佳 陶.) - Source: https://appshunter.io/ios/app/light-teller/id6450953060 (this page in markdown: same URL + `.md`) - Developer: [佳佳 陶](https://appshunter.io/developer/1682189695) - Category: Utilities, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.1 · 1 MB - Languages: English, Japanese, Chinese, Chinese - Released: 2023-07-11 - Data updated: 2026-06-11 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/light-teller/id6450953060/reviews.md ## What is Light Teller? "Light Teller" is an intelligent application that utilizes the smartphone camera to test the brightness of the environment, helping parents determine whether the lighting in their children's study environment is sufficient. Specifically designed for parents with young children, we understand the importance of protecting their eyes during their developmental stages. Therefore, we pay special attention to the impact of lighting on daily eye health and strive to create an optimal learning environment that reduces the risk of myopia. The key advantage of "Light Teller" lies in providing detailed usage instructions and a reference for brightness, enabling you to easily understand and optimize your children's study environment. Key Features: 1. Brightness Testing: Utilize the smartphone camera to quickly and accurately measure the brightness level of the environment, providing reliable reference values for parents. 2. Light Health Guide: Provide parents with educational information about brightness, helping them create a comfortable learning environment for their children. 3. User Instructions: Clear and user-friendly interface and instructions enable parents to quickly get started, operate correctly, and interpret the results of brightness testing. Key Highlights: - Accurate and Reliable: Utilize advanced brightness measurement algorithms to ensure accurate and reliable test results. - Simple and User-Friendly: Designed with a user-friendly interface, allowing you to easily conduct brightness testing without requiring specialized knowledge or equipment. - Illuminating Knowledge: Offer a rich collection of educational articles to deepen parents' understanding of the importance of light and its impact on visual health.(TBD) Whether you are prioritizing your children's eye health or seeking a deeper understanding of the importance of light, "Light Teller" is the ideal choice for you. Please note: This application solely provides brightness testing and educational knowledge sharing. It does not diagnose any environment or offer medical advice. ## Key features - Brightness testing with smartphone camera - Light health guidance for parents - Detailed user instructions - Accurate and reliable measurements - Educational articles on visual health ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | 1 Year Access | $4.99 | one-time | | 3 Months Access | $1.99 | one-time | ## Frequently asked questions about Light Teller ### What is Light Teller? Light Teller is a utility app that uses your smartphone's camera to measure ambient light levels (lux). It's designed to help parents assess if their children's study environments have sufficient lighting for eye health. ### How accurate is Light Teller's brightness testing? The app utilizes advanced brightness measurement algorithms to ensure accurate and reliable test results, providing parents with dependable reference values for their children's study spaces. ### Does Light Teller have ads? No, Light Teller does not contain advertisements, offering an uninterrupted user experience focused on its utility features. ### What devices does Light Teller support? Light Teller is available for iPhone and iPad devices, allowing a broad range of Apple users to benefit from its features. ### How often is Light Teller updated? The latest version of Light Teller is 1.2.3, and it was last updated on March 18, 2025, indicating ongoing development and support. ### What is the age rating for Light Teller? Light Teller has an age rating of 4+, making it suitable for use by children and adults alike, with parental guidance recommended for younger users. ### Can Light Teller diagnose eye conditions? No, Light Teller solely provides brightness testing and educational knowledge sharing. It does not diagnose any environment or offer medical advice. ### What are the in-app purchases in Light Teller? While the app is free to download and use for its core brightness testing and guidance, it offers in-app purchases, likely for additional educational content or advanced features. ## Version history (last 5 releases) ### 1.2.3 — 2025-03-18 - show color temperature of the environment ### 1.2.2 — 2024-10-30 Add Japanese and traditional Chinese for localization. ### 1.2.1 — 2024-09-19 Compatible with iPad. ### 1.2 — 2024-01-29 Copy display bug fix. ### 1.1 — 2023-07-20 Fix display name issue. ## Apps similar to Light Teller | App | Rating | Price | Category | | --- | --- | --- | --- | | [Light Meter LM-3000](https://appshunter.io/ios/app/light-meter-lm-3000/id1554264761) | 4.5 (2,424) | Free | Utilities | | [Libre Light Sensor](https://appshunter.io/ios/app/libre-light-sensor/id1644439968) | 4.8 (113) | Free | Utilities | | [Light Meter - Brightness Calc](https://appshunter.io/ios/app/light-meter-brightness-calc/id1340670397) | 4.2 (5) | $2.99 | Utilities | | [Light Meter: Lux-525 Pro](https://appshunter.io/ios/app/light-meter-lux-525-pro/id1636117065) | 4.5 (113) | Free | Utilities | | [Light Meter for Plant LUX & FC](https://appshunter.io/ios/app/light-meter-for-plant-lux-and-fc/id1628111038) | 1.0 (9) | Free | Utilities | | [Lux Light Meter Pro](https://appshunter.io/ios/app/lux-light-meter-pro/id1292598866) | 3.9 (4,992) | Free | Utilities | ## More apps by 佳佳 陶 - [WorkdaysCounter](https://appshunter.io/ios/app/workdayscounter/id6447691429) - [WallBackground](https://appshunter.io/ios/app/wallbackground/id6462881978) - [NoCandle](https://appshunter.io/ios/app/nocandle/id6467872003) - [JustRandomIt](https://appshunter.io/ios/app/justrandomit/id6502745658) - [PetYearly](https://appshunter.io/ios/app/petyearly/id6563148287) All apps by 佳佳 陶: https://appshunter.io/developer/1682189695 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*