# Luxwell: Spot Light Meter EV — Sunny 16 Exposure Calculator

> iPhone light meter and exposure calculator for photographers. (iPhone/iPad app by Paprika Tech LLC.)

- Source: https://appshunter.io/ios/app/luxwell-spot-light-meter-ev/id6807858801 (this page in markdown: same URL + `.md`)
- Developer: [Paprika Tech LLC](https://appshunter.io/developer/1849782221)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 15 MB
- Languages: American English
- Released: 2026-09-14
- Data updated: 2026-09-19
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/luxwell-spot-light-meter-ev/id6807858801/reviews.md

## What is Luxwell?

Luxwell is a pocket light meter for iPhone. Measure reflected, incident, and spot EV live from the camera, then set shutter, aperture, and ISO. The meter and Sunny 16 calculator stay free.

Point at the scene, the light on your subject, or a single tone. Hold a reading when you have it. Switch the readout between EV, lux, and foot-candles. Built for film and digital photographers who want exposure they can trust in the field.

LIVE METER
Reflected, incident, and spot modes
Tap and pinch the spot reticle. Spot locks exposure so you can compare tones
Hold to freeze a reading
Shutter, aperture, and ISO in 1/3-stop steps
EV, lux, or foot-candles

SUNNY 16
Free exposure calculator. Pick ISO for a shutter at f/16, or pick shutter and aperture for a suggested ISO. A fast outdoor starting point, then adjust for haze, backlight, or subject brightness.

LUXWELL PRO
Optional one-time unlock. Not a subscription. Live metering stays free.

Zone system scale on the live meter
Manual 0.1-stop calibration, or guided Align to Sunny 16
Shoot log with export
Film ISO helper with reciprocity warning
Extra camera presets

Restore Purchases is in Settings.

Luxwell uses the iPhone camera to estimate scene brightness. Results are useful for exposure decisions but are not laboratory-grade and may differ from a calibrated handheld meter.

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Privacy Policy: https://luxwell.paprikatech.io/privacy
Terms of Use: https://luxwell.paprikatech.io/terms
Support: support@paprikatech.io

## Key features

- Live reflected, incident, and spot metering
- EV, lux, and foot-candle readouts
- Sunny 16 exposure calculator
- Shutter, aperture, and ISO settings
- Hold to freeze readings
- Log shooting with export

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $19.99 | one-time |



## Frequently asked questions about Luxwell

### What is Luxwell?

Luxwell is a pocket light meter for iPhone that measures reflected, incident, and spot EV live from your camera. It helps you set shutter, aperture, and ISO for accurate exposure in the field. The core metering and Sunny 16 calculator features are free to use.

### Does Luxwell have ads?

No, Luxwell does not contain advertisements. The app is free to use with optional in-app purchases for advanced features.

### What are the features of Luxwell Pro?

Luxwell Pro is an optional one-time unlock that includes a zone system scale on the live meter, manual 0.1-stop calibration, a shoot log with export, a film ISO helper with reciprocity warning, and extra camera presets. Live metering remains free.

### How accurate is Luxwell compared to a handheld meter?

Luxwell uses the iPhone camera to estimate scene brightness. While useful for exposure decisions, results are not laboratory-grade and may differ from a calibrated handheld meter. Manual calibration options are available.

### What devices does Luxwell support?

Luxwell is currently supported on iPhone devices. It was last updated on 2026-09-15 with version 1.01.090802.

### How do I restore my Luxwell purchases?

You can restore any previous purchases for Luxwell Pro features by navigating to the Settings section within the app. This ensures you retain access to unlocked functionalities.

### What is the Sunny 16 calculator in Luxwell?

The Sunny 16 calculator is a free feature within Luxwell that provides a fast outdoor starting point for exposure settings. You can pick an ISO for a shutter at f/16, or select shutter and aperture to get a suggested ISO.

### What is the age rating for Luxwell?

Luxwell has an age rating of 4+, making it suitable for a wide range of users. The app focuses on providing utility for photographers.

## Version history (last 1 release)

### 1.01.090802 — 2026-09-15

No release notes.

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All apps by Paprika Tech LLC: https://appshunter.io/developer/1849782221

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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 2026-09-19.*