Comparison

Lumu Light Meter vs Luxilux Light Meter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Lumu Light Meter

This app functions as a standalone reflective light meter or pairs with hardware for professional flash and color temperature measurements. It offers various modes for photography and videography, storing measurements with notes and location.

Highlights
  • Standalone reflective light meter
  • Flash and color temperature metering
  • Photo and cine/video modes
  • Spot metering
  • Color temperature in Kelvin
  • Store measurements with notes
Read full description

The light metering tool for every great image maker. Use the standalone app as a reflective light meter or use it in combination with Lumu Power hardware for professional Flash and Color Temperature measurements. Lumu Power is an easy-to-use digital incident color and light meter that works seamlessly with the free Lumu app to deliver Color Temperature, Illuminance, Spot, Ambient, and Flash Exposure metering functionality on your iPhone. A new expression of what a light meter can be, Lumu meets the needs of enthusiasts, professionals, and students who find existing light metering solutions too bulky, expensive, and complicated. “The Lumu Power is without any doubt the most full featured light meter I have ever owned. It’s tiny, it weighs hardly anything, it manages to offer a feature set that expands way beyond what most will ever need from such a device.” - www.35mmc.com Key features: - SPOT METERING: Use your phone’s camera as a reflective light meter. With Lumu Power: - PHOTO SINGLE mode: Giving you exact parameters: exposure time, f-number, ISO, EV, lux. - PHOTO MULTI mode: Calculating average value or contrast between multiple measurements. - PHOTO PINHOLE mode: Measuring exposure time for custom pinhole camera settings. - CINE/VIDEO mode: Set FPS, F-number, exposure time and ISO. Get the values for the ambiental light. - FLASH EXPOSURE: See the graph of flash duration, measure its intensity. - COLOR TEMPERATURE: Read light Color temperature in Kelvin and Green/Magenta shift. - CHROMATICITY: See light colour in CIE1931 diagram and get X,Y,Z coordinates. - ILLUMINANCE mode: showing incident light level in lux / foot-candle values. - NOTES: Store all your measurements together with geo-location, custom notes and your photo in one place. + ND FILTERS, EXPOSURE COMPENSATION and more… Visit http://lu.mu/ to learn more.

About

Luxilux Light Meter

This app functions as a portable light meter for photographers, especially those using film cameras without built-in meters. It allows for precise exposure readings, offers various shooting modes, and lets you save your settings with preview images.

Highlights
  • Average and spot metering
  • Aperture priority mode
  • Shutter priority mode
  • Manual exposure mode
  • Save exposure settings with photos
  • Customizable camera profiles
Read full description

You like using your old film camera but it doesn't have a built-in light meter? The built-in meter is broken or requires special batteries? With Luxilux you always have a light meter in your pocket. --- METERING --- Luxilux will take an average reading of the image you see in the preview. Specify the area for the meter reading even more accurately by zooming in or out. If your device has two or three back cameras, you can switch between them. You can also tap on points of interest to expose correctly for them. --- MODES --- Use Luxilux in aperture priority mode (Av) by choosing the ISO and aperture, and Luxilux will calculate the right shutter speed to get a proper exposure. Use it in shutter priority mode (Tv) by choosing the ISO and the shutter speed, and Luxilux will calculate the right aperture to get a proper exposure. Manual mode (M) lets you change all values and shows you how much they differ from the calculated optimal exposure. --- SAVE EXPOSURES --- Tap "Save" and the currently selected settings are saved alongside a preview image into your photo library. If you give location permission you can also save where the measurement was taken. You can view your saved photos in Luxilux or in the Photos app. --- PROFILES --- You can choose between full stops, half stops or third stops for ISO, aperture and shutter speed. Specify the minimum and maximum values that your combination of camera, lens and film supports. Save these settings in profiles so you can quickly recall them.

Screenshots

Lumu Light Meter4 screens
Luxilux Light Meter4 screens

Verdict

The call

The clearest difference is price: Lumu Light Meter at Free against Luxilux Light Meter's $5.99. Lumu Light Meter also leads on iOS requirement (12.0 vs 16.0). Luxilux Light Meter's advantage is rating (4.9 vs 3.4) and in-app purchases (none vs 3). On ratings volume, update cadence, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Lumu Light Meter is free to download; Luxilux Light Meter costs $5.99 up front. Lumu Light Meter sells 3 one-off in-app purchases. Luxilux Light Meter asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Luxilux Light Meter holds the better App Store score, 4.9 against 3.4. Both are backed by a comparable volume of ratings — 103 and 75 respectively. Written reviews point the same way: 53% of Lumu Light Meter's written reviews are positive against 78% of Luxilux Light Meter's.

UpkeepUpdate frequency

Lumu Light Meter ships an update monthly, Luxilux Light Meter every 6 weeks. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard6 real differences · 4 level
Lumu Light Meter versus Luxilux Light Meter: the parameters behind the verdict, then further details
ParameterLumu Light MeterLuxilux Light Meter
PriceFree — better$5.99
Rating3.4 (103 ratings)4.9 (75 ratings) — better
Positive reviews52.8% of reviews77.8% of reviews — better
Number of ratings103 — better75
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size52 MB4 MB
Age rating4+4+
DeveloperLumu d.o.o.Christian Lobach

Customer experience

Lumu Light Meter

All ratings99 ratings
Positive56.6%
Neutral6.1%
Negative37.4%
Written reviews106 reviews
Positive52.8%
Neutral4.7%
Negative42.5%

Luxilux Light Meter

All ratings75 ratings
Positive96.0%
Neutral2.7%
Negative1.3%
Written reviews36 reviews
Positive77.8%
Neutral5.6%
Negative16.7%

Bugs and requests

Lumu Light Meter

Reported bugs

14 issues
  • 🐛 LUX value shown as FootCandle
  • 🐛 ISO keeps changing when metering
  • 🐛 Color temp readout option disappeared
  • 🐛 Error when factory resetting module
  • 🐛 Cannot read CCT
Show 9 more
  • 🐛 App no longer recognizes original Lumu
  • 🐛 Photo Ambient mode turns off
  • 🐛 Device not recognized after app update
  • 🐛 High-pitched squeal on app open
  • 🐛 Loud painful high frequency noise with earphones
  • 🐛 Saved files not found
  • 🐛 App not working with older iPhones
  • 🐛 Exposure compensation backwards
  • 🐛 Extremely high pitched squeal

Requested features

11 requests
  • 💡 Aperture priority mode
  • 💡 Ability to lock aperture
  • 💡 Analog style shutter speed/aperture display
  • 💡 Option to see all equivalent exposure settings at a glance
  • 💡 Ability to take two readings and see difference in stops
Show 6 more
  • 💡 Use phone's volume button to take reading
  • 💡 Add lower ISO options (below 50)
  • 💡 Half-stop increments for ISO/aperture
  • 💡 Video mode
  • 💡 Location tracking for readings
  • 💡 Sync only on Wi-Fi setting

Luxilux Light Meter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Lumu Light Meter

One-time3
  • Lite to Power Upgrade$69.99
  • Power to Pro Upgrade$229.99
  • Lite to Pro Upgrade$249.99
None

Luxilux Light Meter

No in-app purchases

Questions

Is Lumu Light Meter free?
Lumu Light Meter is free to download, with in-app purchases available.
Is Luxilux Light Meter free?
Luxilux Light Meter costs $5.99, with no in-app purchases.
Which has better reviews, Lumu Light Meter or Luxilux Light Meter?
Luxilux Light Meter is rated higher. Lumu Light Meter averages 3.4 out of 5 from 103 ratings, while Luxilux Light Meter averages 4.9 from 75 ratings.
Do Lumu Light Meter or Luxilux Light Meter have ads?
Neither Lumu Light Meter nor Luxilux Light Meter shows ads.
Which is updated more often, Lumu Light Meter or Luxilux Light Meter?
Lumu Light Meter ships an update monthly, and Luxilux Light Meter every 6 weeks. Most recently, Lumu Light Meter was updated on November 1, 2026 and Luxilux Light Meter on November 7, 2026.

Other comparisons