Light Meter LM-3000

Light Meter LM-3000

Simple & accurate measurement!

2.5K ratings
200 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 9, 2021
  • August 25, 2026
Light Meter LM-3000 video #1 for iPhone
Light Meter LM-3000 screenshot #2 for iPhone
Light Meter LM-3000 screenshot #3 for iPhone
Light Meter LM-3000 screenshot #4 for iPhone
Light Meter LM-3000 screenshot #5 for iPhone
iphone
ipad
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About

Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.

Measure illuminance (lux/foot-candle)
Measure color temperature (Kelvin)
Industry-leading accuracy
Pre-calibrated for your device
Low light sensitivity
Save peak reading
Custom calibration option
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What users say

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+1

What's New in Light Meter LM

4.4.5

August 25, 2026

This update makes the LM-3000 more resilient when working with the iOS camera.

Subscription plans

Continuous Charging

Keep the LM-3000 running as long as you're subscribed

$3.491 Month
How to cancel Light Meter LM subscription ⁉️
1

In-App Purchases

$0.99

Single Charge

Charge your LM-3000 battery once

User reviews

Ерунда полная

Из за рекламы которая маячит сразу при включении и не уходит,требуя платной подписки,пользоваться не стала.

Response from developer

Здравствуйте, MonicBell! Жаль, что первое впечатление оказалось таким — но один момент важно прояснить: рекламы в LM-3000 нет вообще. Экран, который Вы видели, это «заряд батареи» приложения, то есть варианты оплаты. И подписка — лишь один из них: есть разовая покупка на два дня (≈$0,99) и разовая покупка навсегда (≈$19,99). При установке приложение даёт бесплатную «стартовую батарею» минимум на два активных дня измерений, так что сразу после установки измерять можно бесплатно. Если экран не закрывается и не даёт работать — так быть не должно. Напишите нам на support@lightray.io с моделью iPhone и версией iOS, мы разберёмся. Как устроена «батарея», подробно здесь: lightray.io/lightmeter/#purchases-explained С уважением, Dennis и команда Lightray

Nah this a’int it

Just make a light ad based version for hobbyists and occasional use; the battery stuff is actually just annoying and stupid and not as clever as they would like you to think and needlessly complex. Keep the pro full version as is.

Good app but

Meter worked well but forced me to purchase time to continue use.

The best ever light meter only available in this platform

Absolutely correct accuracy and 100% authentic readings and most importantly available in free this is an awesome app the first time im reviewing a good application in app store hats off developers

Response from developer

Hi Rohit54, Thank you so much for your review and the very kind words 😍 It makes us really happy to hear that you appreciate the hard work we've put into the app 🙏 The highest possible accuracy is our main goal, and it's great to hear that our efforts are valued 🫶 All the best, Angela and the Lightray team

23 EUR für 1 Funktion

Feine super App, die eine einzige Aufgabe hatte und diese super erfüllt hat. Jetzt auf einmal, obwohl sie im App Store als kostenfrei und ohne in-App-Käufe und ohne Abo Modell gelistet ist. Entweder ein Abo oder ein Einmalpreis von 23 € ist schon echt sehr sportlich und spiegelt leider nicht den Wert der relevanten Funktion wider, die sich auch nie ändern wird.
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Response from developer

Hallo Kasatschok, Es freut mich sehr zu hören, dass dir unsere App und ihre Funktionen gefallen! Vielen Dank für dein Feedback 🙏 Es stimmt aber nicht, dass sie im App Store als kostenfrei aufgeführt ist. In unserer App-Beschreibung sind die gratis Testperiode von 2 Tagen und die Kaufoptionen beschrieben. Ausserdem markiert Apple automatisch alle Apps, die in-app Käufe beinhalten. Du findest den Preis von 23 Euro zu teuer für das, was du kriegst. Das Preisempfinden ist natürlich subjektiv, unserer Meinung nach ist das Preis-Leistungs-Verhältnis unübertreffbar: Du kriegst ein genaues Lichtmessgerät mit vielen praktischen Funktionen und regelmässigen Updates und Erweiterungen, für deine Hosentasche. Oder sogar günstiger, wenn du dich für eine kürzere Verwendung entscheidest. Aber wie gesagt, da gehen die Meinungen auseinander, und das ist okay. Liebe Grüsse und alles Gute, Angela und das Lightray Team

Developer apps

User experience

🐞

Reported Bugs

3 issues

Diffuser not recognized even when used

Bug

App locks up/crashes

Bug

Constant diffuser pop-up interruptions

Bug

Requested Features

3 requests

Ability to use rear camera

Feature

More flexible diffuser options

Feature

Improved accuracy without diffuser

Feature

FAQ

What does the Light Meter LM-3000 app do?

This app turns your smartphone into a professional-grade light meter. It measures illuminance in lux or foot-candles and correlated color temperature in Kelvin with scientifically validated accuracy, adhering to ISO/CIE 19476 standards.

What are the key features of the LM-3000 app?

Key features include industry-leading accuracy matching professional lux meters, pre-calibration for your specific device, excellent low light sensitivity, the ability to save peak readings, a HOLD function with an acoustic signal, and a custom calibration option to align readings with another meter.

How much does the Light Meter LM-3000 app cost?

The app is free to download and offers a free trial period for two non-consecutive days. After the trial, you can choose from various charging options: a single charge for 48 hours, a monthly subscription for continuous use, or a one-time purchase for unlimited lifetime access.

What are the compatibility requirements for the LM-3000 app?

The app is designed for iPhones and leverages the front-facing camera sensor. It does not require Bluetooth or location permissions. A diffuser is required for accurate measurements, which can be easily made or purchased.

What are common use cases for the Light Meter LM-3000 app?

Common use cases include professional photography for setting correct exposure and color balance, engineering for lighting design and analysis, and by lighting professionals for ensuring accurate illumination levels in various environments. It's also useful for detecting light pollution.