# KelvinCam: Light Meter — Color Temp & Exposure Meter

> iPhone light meter for photographers and filmmakers measuring exposure, color temperature, and tint. (iPhone/iPad app by JAMES STINSON RADCLIFF.)

- Source: https://appshunter.io/ios/app/kelvincam-light-meter/id6772284884 (this page in markdown: same URL + `.md`)
- Developer: [JAMES STINSON RADCLIFF](https://appshunter.io/developer/1890500112)
- Category: Photo & Video, Utilities
- Price: Free with in-app purchases (on sale, was $9.99)
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 5 MB
- Languages: American English
- Released: 2026-05-29
- Data updated: 2026-08-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/kelvincam-light-meter/id6772284884/reviews.md

## What is KelvinCam?

KelvinCam turns your iPhone into a precision light meter and color temperature reader for photographers, filmmakers, and lighting pros.

Measure exposure (EV), lux/foot-candles, and white balance in Kelvin instantly. Save readings, match your lighting, and nail every shot.

Everything happens live on your device. Your camera feed is processed live on your device and never stored, transmitted, or shared.
— WHAT IT MEASURES —
• Color Temperature — the large Kelvin number tells you how warm or cool your light is, with a gradient bar showing exactly where it falls on the warm-to-cool spectrum.
• Tint — the green-magenta axis that color temperature alone doesn't capture, critical for fluorescent and LED environments.
• EV100 — exposure value normalized to ISO 100, shown as a human-readable label (Candlelight, Indoor, Overcast, Full Sun, and more).
— PHOTO & VIDEO MODES —
Photo mode gives you full control with eight scene presets: Auto, Portrait, Landscape, Action, Golden Hour, Sunset, Indoor, and Low Light — each one biases the recommendations for that shooting situation.
Video mode applies the 180° shutter rule automatically. Select from preset frame rates (24, 25, 30, 50, 60, 120 fps) or type any custom value, and KelvinCam calculates the correct shutter for natural motion blur. It will also tell you when you need an ND filter and which strength.
— LOCK & SOLVE —
Tap Shutter or ISO in the recommendations card to lock it. KelvinCam solves for the other value in real time — like shooting in semi-automatic mode. Useful when your camera has a fixed frame rate, a maximum usable ISO, or a creative shutter speed you want to hold.
— LIVE HISTOGRAM —
Tap the waveform button to open a live luma histogram. Red and blue clipping indicators warn you when highlights are blowing out or shadows are being crushed, with percentage readouts showing exactly how much of the frame is affected.
— SNAPSHOT HISTORY —
Save any reading with a tap. Each snapshot captures the full picture: Kelvin, tint, EV, light source, mode, frame rate, scene preset, and all three recommended settings — timestamped and annotatable. Add notes to log a location or studio setup, then share as formatted text.
— CALIBRATION —
Align KelvinCam to a trusted reference meter using independent offsets for EV (±3 stops), color temperature (±500 K), and tint (±15). A live comparison card shows raw and calibrated readings side by side as you adjust.
— BUILT-IN GUIDES —
Seven in-depth guides cover the exposure triangle, shutter speed, ISO and noise, color temperature, the 180° shutter rule, reading EV, and a complete app walkthrough.
— FILM STOCKS (PRO) —
Shooting film? Choose your stock, from Portra and HP5+ to Tri-X and beyond, and KelvinCam pins ISO to the box speed and automatically corrects long exposures for reciprocity failure. Your night and low-light frames land at the right time, and each stock carries notes on its character and handling.
— CONTRAST RATIO METERING (PRO) —
Spot-meter your key light and mark it, then meter the fill. KelvinCam reads out the lighting ratio in stops, so you can dial in exactly the contrast you want, from flat and even to deep and dramatic.

## Key features

- Live light metering
- Color temperature & tint measurement
- Exposure value (EV) readings
- Photo & video modes
- Live histogram with clipping indicators
- Save and annotate readings
- Calibration to reference meters

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| KelvinCam Pro | $9.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/kelvincam-light-meter/id6772284884/reviews.md

### 5/5 — Just what I needed

*2026-06-24*

I shoot videos for a YouTube channel, and I was constantly getting frustrated with white balancing my camera on outdoor shoots. This app solved that problem and gave me so many resources to level up my video production. Best $10 I have spent.

## Frequently asked questions about KelvinCam

### What can KelvinCam measure?

KelvinCam can measure color temperature in Kelvin, tint on the green-magenta axis, and exposure value (EV100). It also provides lux/foot-candle readings and a live luma histogram with clipping indicators.

### How does KelvinCam help with videography?

For video, KelvinCam automatically applies the 180° shutter rule and calculates the correct shutter speed for selected frame rates. It can also advise on ND filter strength when needed.

### Can I lock specific settings in KelvinCam?

Yes, you can tap Shutter or ISO in the recommendations card to lock it. KelvinCam will then solve for the other value in real time, similar to semi-automatic camera modes.

### Does KelvinCam store or share my camera feed?

No, all processing happens live on your device. Your camera feed is never stored, transmitted, or shared, ensuring your privacy.

### What are the 'Film Stocks' and 'Contrast Ratio Metering' features in KelvinCam?

The 'Film Stocks' feature (Pro) helps photographers match settings to specific film types and correct for reciprocity failure. 'Contrast Ratio Metering' (Pro) allows for precise spot metering of key light.

### How often is KelvinCam updated?

KelvinCam was last updated on July 7, 2026, with version 1.4. This indicates active development and ongoing improvements to the application.

### Is KelvinCam available on Android devices?

KelvinCam is currently supported on iPhone and iPad devices. Information regarding Android availability is not provided in the current data.

### What is the age rating for KelvinCam?

KelvinCam has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content.

## Version history (last 5 releases)

### 1.4 — 2026-07-07

Film shooters: pick your stock (Portra, HP5+, Tri-X, and more) and KelvinCam pins ISO to box speed and corrects long exposures for reciprocity failure automatically.

New contrast metering: spot-meter your key light, mark it, then meter the fill. KelvinCam reads out the lighting ratio in stops.

Plus stability fixes and performance improvements.

### 1.3 — 2026-06-22

KelvinCam now feels at home on iPad and adds faster ways to capture a reading.

- iPad redesign: full rotation support with a windowed camera view that adapts to portrait and landscape
- Home Screen widgets: keep your latest reading and quick capture a tap away
- New shutter control for faster, more precise captures
- On-device AI lighting assistant (Pro): ask for guidance on color temperature, exposure, and how to match your lights
- Smoother saving and history, plus general performance and stability improvements

As always, everything is measured on your device. No images leave your phone, no tracking, no ads.

### 1.2 — 2026-06-19

KelvinCam turns your iPhone into a precision light and color
temperature meter for photo and video.

This update focuses on reliability and polish so every reading
is fast and accurate. Thanks for the support, and keep the
feedback coming!

### 1.1 — 2026-06-16

KelvinCam is now free to try. The live Kelvin, EV, and lux meter is free forever; a one-time Pro unlock adds lens aperture control, tap-to-spot-meter, an equivalent exposures table, calibration, unlimited history with CSV export, and the on-device AI assistant. Also new: freeze-hold readings and reference photos on every saved snapshot.

### 1.0 — 2026-05-29

No release notes.

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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 2026-08-09.*