Kelvy - White Balance Meter

Color Temperature Light Meter

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

Free to use and no purchase necessary. Measure color temperature and tint, get camera-specific white balance guidance. Good for Video & Photos Kelvy turns your iPhone or iPad into a practical white balance assistant for location scouting, lighting setups, photography, and filmmaking. Aim the camera at a neutral white or gray reference under the light you want to measure to estimate its color temperature and tint, then see settings tailored to your selected camera. WHAT KELVY SHOWS Kelvy analyzes the live camera image and displays: - Estimated Kelvin color temperature - Green/magenta tint shift - Likely light-source category - Camera-specific white balance and tint settings - CTO/CTB gel suggestions for balancing mixed lighting CAMERA-SPECIFIC GUIDANCE Choose a profile for ARRI, Blackmagic, Canon, DJI, Fujifilm, GoPro, Nikon, OM System, Panasonic, RED, Sony, or use the Generic profile. Kelvy translates each reading into the closest Kelvin and tint steps supported by that camera. KEY FEATURES - Live Kelvin and tint readout with a real-time color temperature graph - Compact Full meter layout on iPhone - Camera-specific white balance and tint recommendations - Likely source and CTO/CTB gel suggestions - Offset control for matching Kelvy to a trusted meter or camera body - Tap to copy Kelvin values - Branded photo exports with reading overlays - Saved reading history with thumbnails and location details - Choose to open Kelvy directly to the Light Meter 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 subscription in your App Store account settings. Measurements are camera-based estimates and can vary by device, reference surface, exposure, and mixed lighting. For critical color work, compare with a calibrated meter. Privacy Policy: https://mikecerdeiros.github.io/kelvy-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

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Camera-specific white balance and tint guidance has been corrected and expanded. The iPhone Full meter layout is now more compact, camera selection is clearer during onboarding, and camera-brand identification has been improved.

Version 1.2.8

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 based, for example, 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

Provider
  • Michael Cerdeiros
Size
  • 13.8 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
  • Developer Website
  • Privacy Policy

    • More by Michael Cerdeiros

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