Comparison

Luminometer vs Light Meter

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 Meter

This tool precisely measures light intensity in Lux and Footcandles, offering data for photography, plant care, and environmental analysis. It provides photography recommendations and generates data reports for various applications.

Highlights
  • Multi-mode metering system
  • Real-time color temperature capture
  • Photography decision engine
  • Plant cultivation light monitoring
  • Space optimization analysis
  • Data report generation
Features
Read full description

This is a high-precision light measurement tool that combines professional metering technology with cross scene adaptation capabilities, providing data support for photography creation, plant research, and environmental optimization. Core functional architecture • Multi mode metering system - Real time capture of color temperature changes and synchronized display of dual unit values of Lux and Fc, supporting dynamic average and peak recording • Photography Decision Engine - Based on ambient light intensity, it intelligently recommends shutter speed, ISO, and aperture combinations, allowing manual adjustment of parameters to achieve personalized exposure control Cross disciplinary analysis tools *Plant cultivation: Monitoring photosynthetically active radiation to ensure optimal growth light conditions *Space optimization: Diagnosing office/home lighting environments and preventing visual fatigue Technical characteristics and value √ Adopting multi-sensor collaborative algorithm, with an error rate lower than industry standards √ Portable use on mobile devices, replacing traditional professional equipment to reduce costs √ Generate data reports and support customized archiving of lighting schemes Redefining the Dimension of Light Control from Lens to Leaves "- Recommended Tool for Photography and Plant Science in 2025 1. Payment: The user deducts the payment through their iTunes account and makes the payment upon confirmation of the purchase 2. Renewal: The user's iTunes account will be charged within 24 hours before expiration, increasing the corresponding subscription period 3. Cancel Renewal: To cancel the renewal, go to "iTunes Store and App Store" ->click on "App ID", enter the "Account Settings" page, click on "Subscription", and select "Cancel Subscription" 4. Privacy Agreement and Service Terms: https://docs.google.com/document/d/1nONXGfXZcKQ6xEDwxsVuXdxZGoxmut4_i64fmeCuWhE 5. Terms of Use: https://docs.google.com/document/d/1TpnftZ9iV5KYd_4xqYNkfYs-8Zt9nWXMU_UHLMbype8

Screenshots

Luminometer3 screens
Light Meter4 screens

Verdict

The call

The clearest difference is rating: Luminometer at 4.0 against Light Meter's 3.0. Luminometer also leads on ratings volume (13 vs 4). Light Meter's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.6). On price, update cadence, in-app purchases and monetization model 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 Meter sells 3 in-app purchases, starting at $9.00 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Luminometer holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 13 and 4 respectively.

UpkeepUpdate frequency

Luminometer ships an update every 2 months, Light Meter every 6 weeks. The most recent releases landed on June 7, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Luminometer versus Light Meter: the parameters behind the verdict, then further details
ParameterLuminometerLight Meter
PriceFreeFree
Rating4.0 (13 ratings) — better3.0 (4 ratings)
Positive reviews0.0% of reviews—
Number of ratings13 — better4
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.613.0 — better
Further details — not scored
Size14 MB13 MB
Age rating4+4+
Developer27GROUP琦 崔

Customer experience

Luminometer

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

Light Meter

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

2 purchases

Luminometer

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

Light Meter

Subscriptions1
  • Weekly membership3 Days trial$9.007 Days
One-time2
  • Annual Membership$14.99
  • Lifetime membership$29.99

Questions

Is Luminometer free?
Luminometer is free to download, with in-app purchases available.
Is Light Meter free?
Light Meter is free to download, with in-app purchases available.
Which has better reviews, Luminometer or Light Meter?
Luminometer is rated higher. Luminometer averages 4.0 out of 5 from 13 ratings, while Light Meter averages 3.0 from 4 ratings.
Do Luminometer or Light Meter have ads?
Luminometer shows ads; Light Meter does not.
Which is updated more often, Luminometer or Light Meter?
Luminometer ships an update every 2 months, and Light Meter every 6 weeks. Most recently, Luminometer was updated on June 7, 2026 and Light Meter on September 10, 2026.

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