# Luxilux Light Meter — Measure the perfect exposure

> Pocket light meter for film and digital cameras, offering precise exposure control. (iPhone/iPad app by Christian Lobach.)

- Source: https://appshunter.io/ios/app/luxilux-light-meter/id1487384157 (this page in markdown: same URL + `.md`)
- Developer: [Christian Lobach](https://appshunter.io/developer/516573165)
- Category: Photo & Video, Utilities
- Price: $5.99
- Rating: 4.90/5 from 75 App Store ratings · 36 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 4 MB
- Languages: American English, German (Germany), Chinese (Traditional, Taiwan), Chinese (Simplified, China), Japanese
- Released: 2019-11-12
- Data updated: 2026-08-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/luxilux-light-meter/id1487384157/reviews.md

## What is Luxilux Light Meter?

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.

## Key features

- Average and spot metering
- Aperture priority mode
- Shutter priority mode
- Manual exposure mode
- Save exposure settings with photos
- Customizable camera profiles

## Recent user reviews (10 of 36)

All indexed reviews: https://appshunter.io/ios/app/luxilux-light-meter/id1487384157/reviews.md

### 5/5 — 赞

*2026-06-05*

很实用，快捷

### 5/5 — Sehr genaue Ergebnisse

*2025-09-11, version 2.1*

Ursprünglich hatte ich diese App mit einem Stern bewertet. Mittlerweile habe ich herausgefunden, dass es nicht an der App lag, sondern an meiner Kamera. Meine Kamera hat in den Verschlusszeiten Abweichung gehabt. Dies habe ich mit einem Messgerät herausgefunden. Nach Reparatur ist dieser Fehler nicht mehr aufgetreten. Seitdem ist auch die App ziemlich genau! Benutze diese App jetzt seit zwei Jahren mit sehr präzisen Ergebnissen! Und das sogar, obwohl ich auch schon Spielereien gemacht habe wie pushen oder Pullen und die Ergebnisse waren immer exakt genau!

### 3/5 — Needs refinement

*2025-03-21, version 2.0.2*

The ISO choices jump in large increments.  When I pay for an app, I expect a bit more refinement than a free app.  For example, when using ISO 125 film, I have to use the 100 setting in the app and then do some math myself to compensate.  Can’t the app do the math for me and let me adjust the ISO in small increments?

### 5/5 — My app suggestions

*2025-03-12, version 2.0.2*

Please add a grid and a level. The app updated is wonderful for me, but I’m missing a grid and a level. It’ll make it way easier for me to get the shot and it’s not cut off but leveled and in a grid. Other than that, I’m loving the app now because of the useful upgrades it brings me! Thanks for the update. Hopefully, I’ll see a grid and level soon added to this app.

### 1/5 — Не очень

*2025-03-01*

Выброшенные деньги, хотелось бы их вернуть… приложение странное

### 4/5 — ISO 500?

*2024-08-23, version 2.0.1*

I hope it will have iso500.

### 5/5 — Custom shutter speed suggestion

*2023-08-15, version 1.11*

I would love a feature where u can customize the shutter speed for longer than 30 seconds. Anyway that can be added?

### 5/5 — Great communication from app developer!

*2023-06-26, version 1.11*

I had an issue with my iPhone enlarging the text too much on the app and the developer responded 5 minutes later with a fix!   I’m blown away by such great service.     The app is perfect for the mid level photographer to test out how close they can get to guessing proper exposure without an expensive light meter.    I do it by eye and use this app to double check.

### 5/5 — Quick and easy to read integral light meter

*2023-06-12, version 1.11*

This isn’t the only light meter app. There are more sophisticated around. But they either use a portion of the image for metering (think of a spot meter) or they are cluttered with unnecessary information. This one uses the full image for metering and has an quick to read interface which allows for fast-paced photography because spot metering slows me down. And it‘s fairly accurate when I compare it with the readings of my M6 or my Seconic professional light meter.

### 3/5 — 画面キャプチャーボタン

*2022-10-21*

使い易いアプリの作成ありがとうございます。
私の使い方として露出設定が表示されたら画面キャプチャーをして設定を記録しているのですが右手でiPhoneを持ち左手でボリュームと電源ボタンを同時押しでキャプチャーしています。
画面上にキャプチャーボタンが有って右手だけで完結出来ると最高です。

## Frequently asked questions about Luxilux Light Meter

### What does the Luxilux Light Meter app do?

This app acts as a digital light meter for your smartphone. It helps photographers, especially those using film cameras or cameras with broken meters, to accurately measure light for perfect exposure. It analyzes the camera's preview image to provide readings.

### What are the key features of Luxilux?

Key features include average and spot metering with zoom capabilities, aperture priority (Av), shutter priority (Tv), and manual (M) exposure modes. You can also save your exposure settings along with a preview image and location data.

### Is Luxilux free to use?

Yes, the Luxilux Light Meter app is available for free. There are no in-app purchases or advertisements mentioned, suggesting a completely free experience for users.

### What devices is Luxilux compatible with?

The app utilizes your device's built-in cameras for metering. It is compatible with smartphones that have functioning rear cameras. If your device has multiple rear cameras, you can switch between them for different readings.

### How can I use Luxilux for my film camera?

For film cameras, you can set your ISO and aperture in the app's Av mode, and it will calculate the correct shutter speed. Alternatively, in Tv mode, you can set ISO and shutter speed to get the right aperture. Manual mode allows you to adjust all settings and see deviations from optimal exposure.

## Version history (last 5 releases)

### 2.1 — 2025-03-21

Added a Control Center control. You can now launch Luxilux from Control Center or your Lock Screen.

### 2.0.2 — 2025-02-21

Fixed an issue with initializing the camera

### 2.0.1 — 2023-10-18

fix a potential crash

### 2.0 — 2023-09-05

Luxilux 2.0 comes with a bunch of big new features:

LOG IMAGE DATA:
You can now save preview-sized images to your photo library that contain your chosen exposure settings, time and date, and the location where the image was taken.

PROFILES:
Create separate profiles for film and camera combination. You can store the maximum / minimum values as well as wether you want to use full, half or third stops in profiles. Choose the profile inside the app, or launch the app using a profile right from your home screen.

TAP TO EXPOSE:
In addition to the average metering of a scene you can now tap on an area of the image to expose for this part (just like in the Camera app).

MUCH MORE:
- Layout changes so you can see even more of the preview image
- Increased range of aperture and shutter speed values
- Increased possible exposure compensation to +10 (ideal for use with ND filters)
- Improved accuracy in tricky situations such as low light
- A bunch of bug fixes and improvements

Thanks a lot for your feedback!
If you like the update I would appreciate you reviewing it on the App Store.
If there is something wrong or you have ideas for further improvements, contact me at luxilux@christian-lobach.de

### 1.11 — 2021-12-09

Choose between four different app icons!

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## More apps by Christian Lobach

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All apps by Christian Lobach: https://appshunter.io/developer/516573165

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*