Kelvy - White Balance Meter

Color Temperature Light Meter

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Measure white balance fast with Kelvy. Get live Kelvin, tint, camera profile guidance, and saved scout captures for cleaner color decisions on set. Kelvy turns your iPhone into a professional color temperature meter. Point your camera at any light source and instantly see the Kelvin reading, tint value, and the exact white balance setting for your camera. WHAT KELVY DOES Kelvy reads the color temperature of ambient light in real time using your iPhone camera. It gives you an accurate Kelvin measurement, tells you the nearest white balance preset (Daylight, Tungsten, Fluorescent, etc.), and recommends the exact value to dial into your camera. KEY FEATURES - Live Kelvin readout with real-time color temperature graph - Recommended camera white balance setting for every reading - CTO/CTB gel filter recommendations for matching mixed lighting - Tint measurement for green/magenta shift detection - Tap to copy Kelvin value to clipboard - Offset control for fine-tuning readings against your camera or meter - Branded photo export with your reading overlay - Reading history with thumbnails for quick reference BUILT FOR FILMMAKERS AND PHOTOGRAPHERS Whether you're scouting a location, setting up lights on set, or quickly checking the color temperature of a practical, Kelvy gives you the numbers you need without carrying extra gear. It's the light meter that's always in your pocket. Kelvy is free to use with 5 captures each week. Kelvy Pro unlocks unlimited captures. SUBSCRIPTION INFO Kelvy Pro is available as an auto-renewable subscription. Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your account settings in the App Store after purchase. Privacy Policy: https://mikecerdeiros.github.io/kelvy-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

  • 5.0
    out of 5
    5 Ratings

Minor bug fixes and performance improvements.

Version 1.2.5

The developer, Michael Cerdeiros, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Michael Cerdeiros
Size
  • 12.1 MB
Category
  • Photo & Video
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 18.0 or later.
  • Mac
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 2.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Michael Cerdeiros
  • Privacy Policy

    • More by Michael Cerdeiros

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