Lux Meter – Light Meter

Lux Meter – Light Meter

Illuminance, EV & foot-candle

7 ratings
2 reviews
Free
In-App PurchasesWith Ads

Details

Released
July 22, 2026
Updated
October 26, 2026

Features

Lux Meter – Light Meter screenshot #1 for iPhone
Lux Meter – Light Meter screenshot #2 for iPhone
Lux Meter – Light Meter screenshot #3 for iPhone
Lux Meter – Light Meter screenshot #4 for iPhone
Lux Meter – Light Meter screenshot #5 for iPhone
Lux Meter – Light Meter screenshot #6 for iPhone
Lux Meter – Light Meter screenshot #7 for iPhone
Lux Meter – Light Meter screenshot #8 for iPhone
Lux Meter – Light Meter screenshot #9 for iPhone
Lux Meter – Light Meter screenshot #10 for iPhone
iphone
iphoneDuo
ipad
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About

This tool transforms your iPhone into a professional light meter, measuring illuminance in lux and foot-candles in real-time. It offers exposure calculations, color temperature estimates, and various presets for different use cases, all while working offline and without ads.

✓Real-time lux and foot-candle readout
✓Exposure Value (EV) calculation
✓Color temperature (CCT) estimate
✓Spot or average metering
✓Use-case presets
✓CSV export of readings
✓100% offline functionality
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What's New in Lux Meter

1.2.6

October 26, 2026

• New: Lux Meter now runs on iPad — measure illuminance in lux and foot-candles on the big screen. • New: full support for iPhone Duo, on both the inner and outer screen. • Better accessibility: VoiceOver reads every light meter reading and button, with clearer contrast. • A fresh app icon and various refinements.

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Subscriptions & In-App Purchases

$2.99

Lux Meter Premium

No ads, Room Survey, PDF reports & pro tools.

Events

Read more about Winter Light Meter Challenge

Winter Light Meter Challenge

Measure lux at home before the dark days

Nov 1, 2026 — Dec 1, 2026

User reviews

Can’t tell what it’s looking at

I’m not sure this thing is very accurate. But then it’s hard to see where it’s looking. I tried pointing it up at a street light but the reading was very low. Also, I assume the little camera icon in the upper left is supposed to switch to the front camera but every time I select it, the app crashes.
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Response from developer

Measuring point issue has fixed on the latest update. Thank you for your feedback.

なかなか良いです。

照度計として便利だと思いました。

Response from developer

ありがとう。

Developer apps

FAQ

Does Lux Meter have ads?

Yes, Lux Meter contains advertisements. This is indicated by the 'hasAds' flag in the application data.

How accurate is Lux Meter?

Lux Meter uses camera-based reflective metering, following the ISO 2720 photographic standard. For best results, calibrate once against a reference and use consistent lighting conditions.

Can Lux Meter be used offline?

Yes, Lux Meter works 100% offline. It does not require an account, tracking, or network connection to function.

What devices does Lux Meter support?

Lux Meter is currently supported on iPhone devices.

What is the age rating for Lux Meter?

Lux Meter has an age rating of 4+.

How often is Lux Meter updated?

The latest version of Lux Meter is 1.1, and it was last updated on August 19, 2026. The release date was July 22, 2026.

What are the different metering modes in Lux Meter?

Lux Meter offers both spot metering, which focuses on the center of the camera's view, and average metering, which analyzes the entire frame.

Can I export my readings from Lux Meter?

Yes, you can save single readings or record sessions over time. These sessions can include notes and location tags, and can be exported as CSV files via the share sheet.