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 Millions
We're lucky to have more than one million of happy users that have used 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 with RAW image processing.
It features a low-light mode which automatically darkens the user interface when measuring in a low-light environment,
eliminating the impact of the device's screen.
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.
Is the LM-3000 a free app?
The LM-3000 is free to download and comes with a free trial period.
The trial period lasts for two non-consecutive days, giving you enough time to see if the app fits your needs.
The status of your free trial will be shown as the "battery level" on the top right of the LM-3000's display and
on the 'Battery Status' screen.
Once your light meter's "battery" is depleted, you may choose a Charging Option to keep using the app.
You can pick what works best for you: a quick top-up for another 48 hours (perfect for occasional use), a monthly subscription
(great if you use it regularly), or a one-time purchase for unlimited lifetime access.
You won't be charged anything without you explicitly confirming twice.
With every purchase you support us in providing you with the best, most accurate, and ad-free light meter app in the world.
How do the LM-3000's purchases work?
The LM-3000 runs on its own (not your device's) "virtual battery" that powers the app. When you install the app, you get a free Starter Battery that lets you try everything. It lasts for at least two active days (days when you take real light measurements over 500 lux with a diffuser).
What does 'Battery Status' mean?
Think of the LM-3000 like a handheld tool with its own battery. Each time you measure light, that battery slowly runs down. When it's empty, you can choose a Charging Option to keep using the app. The Battery Status shows you the current state of your battery.
What are my options?
Choose what fits your needs best:
Single Charge: An inexpensive charge that keeps the LM-3000 powered for another 48 hours.
Perfect if you use the app occasionally.
Continuous Charging: A monthly subscription that keeps your battery continuously charged for as long as you need it.
Great for regular use.
Unlimited Battery: A one-time purchase that lasts a lifetime. Buy once, use forever.
Why do I need to pay?
The LM-3000 isn't just another light meter app – it's the result of over 5 years of research and development, and it's the only truly accurate light meter app available. We've kept it completely ad-free for everyone and believe in a transparent business model where you choose what works best for you.
Do I need to repurchase when I buy a new device or reinstall the app?
No. Purchases are restored automatically when re-installing the app. Additionally, you'll find a 'Restore Purchase'-button on the Battery Status screen.
Why can't I switch to the rear camera?
To measure illuminance, you need to measure the light that falls onto a surface. Using the rear camera, you'd measure light reflected off a surface.
