Lightmeter LM-3000
The only real Light Meter App Out there!
Proven Accuracy On All iOS Devices
No Handheld Meter Required
Why waste money on a hardware meter when you're already carrying one in your pocket?
We offer the same quality and usability than a handheld light meter.
Proven Accuracy
The Light Meter LM-3000 is even more accurate than almost any cheap light meter available.
It is tested and calibrated using professional Class A equipment for all iPhones and iPads — truly a light meter you can
trust!
No Sensor Required
You won't need any additional light sensor — the camera already got you covered.
Excellent Sensitivity
The Light Meter LM-3000's measurement algorithm delivers unrivaled sensitivity to capture the faintest lighting changes, empowering new possibilities in light pollution and health research.
No Ads
Our app is equipped with a clean and simple user interface and most importantly: No Ads!
Light Meter Comparison
We compared our app against various other light meters and light meter apps and can confidently state that no other product even comes close in terms of accuracy.
We've written an in-depth article comparing all the light meter apps we could find on the App Store in more detail.
Trusted by Thousands
We're lucky to have many thousands of happy users that use the Light Meter LM-3000 to their benefit.
Download For Free
Light Meter LM-3000 is available for free with a limited trial period
Frequently Asked Questions
How to measure in a dark or low-light environment?
The LM-3000 works exceptionally well in dark environments and is much more sensitive than most handheld light meters, thanks to its
superior measurement system using the device's camera.
It features a low-light mode which automatically darkens the user interface when measuring in a low-light environment,
so the impact of the screen brightness on measurements becomes negligible.
For optimal results: ensure that the screen brightness is turned to the minimum. If the screen doesn't stay on the minimum brightness,
you should disable auto-brightness in your device's accessibility settings.
This article explains how to disable auto-brightness for iOS.
Is the LM-3000 a free app?
Not entirely. You can download and use the app for free within a trial period of at least 48 hours to make sure it fits your
need. The status of your free trial will be shown as the "battery level" on the top right of the LM-3000's display.
Once your light meter's "battery" is depleted, we ask you for a one-time fee of ~$8 that is valid a lifetime.
You won't be charged anything without explicit purchase.
With every purchase you support us in providing you with the
best, most accurate, and ad-free light meter app in the world.
Do I need to repurchase the unlimited battery when I buy a new device or reinstall the app?
No. Just download the app normally and tap 'Restore Purchase' when the unlimited battery screen is shown.
Why can't I switch to the rear camera?
To measure illuminance, you need to measure the light that falls upon a surface. Using the rear camera, you'd measure exitance, light that gets reflected by a surface.