Lux Light Meter Pro vs Light Meter LM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lux Light Meter Pro
Measure light intensity in lux and foot candles with this 2-in-1 meter. Optimize photography settings, adjust indoor lighting, or prevent eye strain with professional-quality readings directly from your smartphone.
- Real-time lux and foot candle measurements
- Real-time color temperature measurements
- Real-time histogram plotting
- Customizable settings for shutter speed, ISO, aperture
- Front and back camera support
- Intuitive and customizable controls
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Light Meter is a 2-in-1 light intensity (lux) and exposure meter with customizable settings. Whether you want to capture the perfect photo or optimize lighting in any space, Light Meter provides professional-quality readings right on your phone. Forget about expensive professional equipment that you have to carry around. With Light Meter, you can get light intensity data with just one click to choose the best settings for manual or film photography, adjust home, work, or greenhouse lighting, and prevent eye strain from poor lighting. Features: - intuitive and customizable controls - for front and back cam - collects light intensity data in real time - instant lux and foot candle measurements - real-time color temperature measurements - real-time histogram plotting - customizable settings for shutter speed, ISO, aperture - preview and adjust diaphragm settings before shooting Have any questions or suggestions? Write to us: sparkappsfeedback@gmail.com Terms of Use - https://www.iubenda.com/terms-and-conditions/82717056 Privacy Policy - https://www.iubenda.com/privacy-policy/82717056
Light Meter LM
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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Turn your smartphone into a professional-grade light meter. Measure illuminance (lux/foot-candle) and color temperature (CCT in Kelvin) with unmatched accuracy — trusted by photographers, engineers, and lighting professionals worldwide. Why waste money on a hardware meter when you’re already carrying one in your pocket? The LM-3000 offers the same quality and usability as a traditional hardware light meter. Developed by optics scientists at the Zurich University of Applied Sciences, LM-3000 is the only light meter app scientifically validated for accuracy. It achieves professional-grade precision by leveraging your iPhone's front-facing camera sensor with advanced RAW image processing. Unlike relying on estimates like other apps, it adheres to the ISO/CIE 19476 standard, ensuring measurements you can trust for critical applications. MEASUREMENTS ⎷ Illuminance in lux or foot-candles ⎷ Correlated color temperature in kelvin FEATURES ⎷ Industry-leading accuracy, matching professional high-end lux meters ⎷ Pre-calibrated for your specific device ⎷ Excellent low light sensitivity to detect light pollution ⎷ No ads ⎷ No Bluetooth and location permission required ⎷ In-app manual ⎷ Save peak reading ⎷ HOLD function with acoustic signal ⎷ Custom calibration option to align readings to another meter DIFFUSER REQUIRED Like every real light meter, the LM-3000 requires a diffuser to measure accurately. A diffuser scatters incoming light evenly on the sensor and prevents hotspots. While it may sound complex, the solution is surprisingly easy. You have two options: 1) Easily build a diffuser yourself in less than a minute using standard printer paper. This is accurate enough for most use cases. 2) Get the dedicated Diffuser Accessory (free worldwide shipping) for best accuracy and convenience. More details on https://lightray.io/diffuser/ (!) Avoid apps that don’t require a diffuser! They are inaccurate because they ignore the basic physics of light measurement. TRY BEFORE YOU BUY 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: → Single Charge — top-up for another 48 hours (perfect for occasional use), → Continuous Charging — a monthly subscription (great if you use it regularly), → Unlimited Battery — a one-time purchase for unlimited lifetime access LM-3000 is the result of over five years of dedicated research and development, ensuring you get a tool that is precise and reliable. Every in-app purchase supports future development and helps keep the app ad-free for everyone. As a member of 1% for the Planet, we donate at least one percent of all revenue to environmental non-profits — this is our way of giving back. ACCURACY Accuracy is not an afterthought — Apps developed by Lightray Innovation are developed according to the ISO/CIE 19476 standard. Thanks to RAW image processing and a default calibration per device model they’re able to match the performance of high quality traditional hardware light meters. To ensure quality we rigorously test our apps regularly on upcoming devices. DOWNLOAD FOR FREE. TRUSTED BY MILLIONS. LM-3000 is the go-to light meter for photographers, professionals, engineers, and lighting enthusiasts who rely on accurate measurements — not estimates or guesswork. Download for free today and experience the difference! See the app in action: https://youtu.be/EJW7NfE2qCk Terms and Conditions: https://lightray.io/lightmeter/terms/
Screenshots
Verdict
The clearest difference is rating: Light Meter LM at 4.5 against Lux Light Meter Pro's 3.9. Light Meter LM also leads on ads (none vs shown) and review sentiment (40% vs 21%). On price, ratings volume, 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
Both are free to download. Lux Light Meter Pro sells 3 in-app purchases, starting at $1.99 per month and Light Meter LM sells 3 in-app purchases, starting at $3.49 per month. Whichever you choose, the download price is not the number that matters.
Light Meter LM holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 5.2K and 2.6K respectively. Written reviews point the same way: 21% of Lux Light Meter Pro's written reviews are positive against 40% of Light Meter LM's.
Lux Light Meter Pro ships an update every 3 months, Light Meter LM monthly. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.
| Parameter | Lux Light Meter Pro | Light Meter LM |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (5.2K ratings) | 4.5 (2.6K ratings) — better |
| Positive reviews | 21.2% of reviews | 40.4% of reviews — better |
| Number of ratings | 5.2K — better | 2.6K |
| Update frequency | Every 3 months | Monthly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15 | 15.0 |
| Further details — not scored | ||
| Size | 19 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Marina Polyanskaya | Lightray Innovation GmbH |
Customer experience
Lux Light Meter Pro
Light Meter LM
User reviews
Lux Light Meter Pro
From 5.2K App Store ratingsWhat we love
- 🚀 Simple and straightforward
- 👍 Useful for measuring light levels
- 🔍 Provides general lux measurements
Room to improve
- 🐛 Inaccurate and inconsistent readings
- 🔍 Limited functionality compared to professional light meters
- 💰 Requires subscription for full features
- 🤖 Glitchy and non-responsive at times
Light Meter LM
From 2.6K App Store ratingsWhat we love
- 👍 Great app
- 👍 Accurate measurements
- 👍 Easy to use
- 👍 Helpful customer service
- 👍 Useful for science/research
Room to improve
- 🐛 Requires diffuser for accurate readings
- 💰 Expensive for a light meter app
- 🔋 Battery/trial period issues
- 🔍 Inconsistent/inaccurate readings
- 🙄 Misleading/deceptive marketing
Bugs and requests
Lux Light Meter Pro
Reported bugs
3 issues- Readings stuck at 0 lux regardless of light conditions
- Frequent crashes and freezes
- Inability to switch between front and rear cameras
Requested features
3 requests- Ability to save and review past measurements
- More detailed instructions and guidance on proper usage
- Improved accuracy and calibration options
Light Meter LM
Reported bugs
3 issues- Diffuser not recognized even when used
- App locks up/crashes
- Constant diffuser pop-up interruptions
Requested features
3 requests- Ability to use rear camera
- More flexible diffuser options
- Improved accuracy without diffuser
In-app purchases
Lux Light Meter Pro
- Premium Access3 Days trial$1.991 Month
- Premium Access2 variants$14.991 Year
- Pro Mode$9.99
Light Meter LM
- Continuous Charging$3.491 Month
- Single Charge$0.99
- Unlimited Battery$19.99
Questions
Is Lux Light Meter Pro free?
Is Light Meter LM free?
Which has better reviews, Lux Light Meter Pro or Light Meter LM?
Do Lux Light Meter Pro or Light Meter LM have ads?
Which is updated more often, Lux Light Meter Pro or Light Meter LM?
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