Comparison

Luminometer vs Light Teller

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Luminometer

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
Read full description

Luminometer is an exceptional app that is designed to transform your iPhone or iPad into a professional and user-friendly light meter. It is based on Internal Exposure Compensation, which makes it the most accurate lux meter available on the market today. With Luminometer, you can easily measure the lux of any light source in both lx and foot-candle units without having to spend any money on professional equipment. One of the standout features of Luminometer is the ability to swiftly and efficiently set up your greenhouse, living room, workplace, study room, or any other area with the perfect level of illumination. Our app ensures that you achieve a well-lit environment that is comfortable to work in without causing any unnecessary glare. The app is incredibly versatile, making it consistent for use in various lighting conditions such as plant lighting, household lighting, workstation lighting, and mood lighting. No matter the type of lighting you need to measure, Luminometer is up to the task. With Luminometer, you get a comprehensive set of features that enable you to measure lux with ease. The camera view feature allows you to view the area being measured, making it even more user-friendly. The app is calibrated using top reference equipment, ensuring that your measurements are always precise and reliable. Whether you're dealing with ambient indoor and outdoor lighting or task and accent lighting, Luminometer has you covered. You can trust that our app is accurate and reliable, thanks to our calibration process, which is done using the best reference equipment available. In conclusion, if you're looking for an accurate, versatile, and easy-to-use light meter app, then Luminometer is the perfect solution for you. Get started today and experience the benefits of using our app to achieve the perfect level of illumination for any environment. Terms and pricing: Our weekly subscription costs $3.99 USD/week and provides you with unlimited access to premium features, as long as your subscription remains active. The subscription automatically renews, and payment will be charged to your iTunes account when you confirm the initial purchase. If you do not wish to renew your subscription, you may turn off the auto-renewal option in your Account Settings at least 24-hours before the current subscription period ends. For more information, please refer to our terms of service available at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ or privacy policy on https://27groupts.notion.site/Privacy-Policy-for-Luminometer-iOS-App-68f7e665c2924108a9111eae825e53c7

About

Light Teller

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
Read full description

"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.

Screenshots

Luminometer3 screens
Light Teller3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Luminometer versus Light Teller: the parameters behind the verdict, then further details
ParameterLuminometerLight Teller
PriceFreeFree
Rating4.0 (13 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings13 — better1
Update frequencyEvery 2 months — betterEvery 5 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.616.1 — better
Further details — not scored
Size14 MB1 MB
Age rating4+4+
Developer27GROUP佳佳 陶

Customer experience

Luminometer

All ratings13 ratings
Positive69.2%
Neutral7.7%
Negative23.1%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Light Teller

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Luminometer

Subscriptions1
  • Weekly$2.997 Days
One-time1
  • Lifetime$9.99
2 purchases

Light Teller

One-time2
  • 3 Months Access$1.99
  • 1 Year Access$4.99

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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