Light Meter LM-3000

Light Meter LM-3000

Simple & accurate measurement!

2.5K ratings
192 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 9, 2021
  • June 30, 2026

Features

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
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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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What's New in Light Meter LM

4.4.3

June 30, 2026

This update enhances the usability by: - Improving measurement rounding - Fixing the HOLD button's touch area and its interaction with the diffuser warning - Fixing a bug where the camera kept running while the measurement was not visible

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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 ⁉️
2

In-App Purchases

$0.99

Single Charge

Charge your LM-3000 battery once

User reviews

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.

Tired of subscriptions

Works well enough before your virtual light meter “runs out of battery” and you have to pay to recharge it or it won’t work. This shouldn’t be a subscription.

Trial only

They don’t tell you this is only a short trial. Two stars for the obfuscation.

Не понятно

В чем смысл такой платы за приложение, если прибор люксометр можно купить за 1000-1500 руб. вы там куку?

Response from developer

Здравствуйте Milabone, Спасибо за ваш отзыв. Ценообразование – сложный вопрос, и мы понимаем, что не можем угодить всем. Мы считаем, что нашли справедливое решение. Все приложение можно протестировать бесплатно, и если оно вам понравится, вы сможете выбрать подходящий вариант из нескольких предложенных. Вы получите точный светомер со множеством практичных функций и регулярными обновлениями — и все это за небольшую цену! По нашему опыту, недорогие светомеры, о которых вы говорите, очень неточные. Но если вы нашли такой, который соответствует вашим требованиям, я, конечно, рада за вас☺️ С уважением, Анжела и команда Lightray

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.