Comparison

Light Teller vs Luminosys

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

Head to head
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.

About

Luminosys

Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.

Highlights
  • Measures light in Lux
  • Measures light in Foot Candles (FC)
  • Uses phone camera for accuracy
  • Easy to use interface
  • Suitable for photography
  • Useful for indoor gardening
Read full description

Luminosys allows you to accurately measure the ambient light level in Lux or Foot Candles (FC). To do this, Luminosys uses your phone's camera in conjunction with a piece of paper to accurately measure the light level. It is very easy to use and is a great app for those looking for accurate light measurements for photography, comparing light sources, or indoor gardening.

Screenshots

Light Teller3 screens
Luminosys3 screens

Verdict

The call

The clearest difference is rating: Light Teller at 5.0 against Luminosys's 4.4. Light Teller also leads on ads (none vs shown) and update cadence (every 5 months vs every 19 months). Luminosys's advantage is in-app purchases (none vs 2) and ratings volume (7 vs 1). On price, device support and iOS requirement 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. Light Teller sells 2 one-off in-app purchases. Luminosys asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Light Teller holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Luminosys has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Light Teller ships an update every 5 months, Luminosys every 19 months. Both last shipped on September 20, 2026.

Scorecard6 real differences · 4 level
Light Teller versus Luminosys: the parameters behind the verdict, then further details
ParameterLight TellerLuminosys
PriceFreeFree
Rating5.0 (1 ratings) — better4.4 (7 ratings)
Positive reviews—75.0% of reviews
Number of ratings17 — better
Update frequencyEvery 5 months — betterEvery 19 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.116.0 — better
Further details — not scored
Size1 MB3 MB
Age rating4+4+
Developer佳佳 陶Melissa Zwick

Customer experience

Light Teller

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

Luminosys

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

2 purchases

Light Teller

One-time2
  • 3 Months Access$1.99
  • 1 Year Access$4.99
None

Luminosys

No in-app purchases

Questions

Is Light Teller free?
Light Teller is free to download, with in-app purchases available.
Is Luminosys free?
Luminosys is free to download, with no in-app purchases.
Which has better reviews, Light Teller or Luminosys?
Light Teller is rated higher. Light Teller averages 5.0 out of 5 from 1 ratings, while Luminosys averages 4.4 from 7 ratings.
Do Light Teller or Luminosys have ads?
Luminosys shows ads; Light Teller does not.
Which is updated more often, Light Teller or Luminosys?
Light Teller ships an update every 5 months, and Luminosys every 19 months. Most recently, Light Teller was updated on September 20, 2026 and Luminosys on September 20, 2026.

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