Color Temperature Meter+

Kelvin & Tint · White Balance

Free · Designed for iPad. Not verified for macOS.

Aim Color Temperature Meter+ at a white sheet or grey card and read the colour temperature of your light in Kelvin, with a white balance tip for your camera. Color Temperature Meter+ measures the colour temperature of the light around you in Kelvin, with tint, mired and the camera white balance to match, straight from your iPhone's camera. ▶ HOW IT MEASURES On iPhone the app reads the camera's own estimate of the light falling on the scene, the same estimate iOS uses to set white balance. Point the camera at a plain white or grey surface lit by the light you want to measure, not at the lamp itself. The reading settles within seconds and shows a ± range, so you can see how steady it is. When that estimate is not available, the app samples the centre of the frame instead, and you can calibrate it once on white paper in daylight. ▶ WHAT YOU SEE • Kelvin with a ± range, updating live • Mired value for filter and gel maths • Light type: golden hour, tungsten, fluorescent, LED, daylight, cloudy, shade • Tint (green or magenta) and Duv • Spectrum bar from 1,000 K to 15,000 K • The nearest camera white-balance preset: tungsten, fluorescent, flash, daylight, cloudy or shade ▶ FREEZE AND SAVE Tap Freeze to hold the current reading. A result card shows the Kelvin, mired, light type and matching white-balance preset, with Save Reading and Measure Again right below it. Saved readings keep their date and time. The latest 50 are kept, you can delete any of them, and you can export the list as CSV. ▶ PHOTOGRAPHY WB ASSIST Pick a target of 3200 K, 4300 K, 5500 K or 6500 K. The app shows the mired shift from the measured light to that target, the Kelvin to dial into your camera's custom white balance, and the CTO or CTB gel strength that closes the gap, from 1/8 upwards. ▶ REFERENCE CHART Thirteen common light sources, from candle flame (1,900 K) to clear blue sky (10,000 K), to compare with what you measured. ▶ HONEST LIMITS A phone camera is not a spectrometer. The app reports correlated colour temperature and tint, which is what matters for matching white balance and choosing gels. It does not measure spectral power distribution, CRI or TLCI, and two lamps with the same colour temperature but different spectra read the same. Mixed lighting gives a blend of the sources. Use it to set up shoots, match bulbs and check rooms; use a dedicated colour meter for critical colour work. ▶ PRIVACY Camera images are analysed on your device and are never uploaded. Available in 30 languages.

  • 3.7
    out of 5
    6 Ratings

• Newly installed? Color Temperature Meter+ now opens the Meter tab with less waiting on that first launch, so you can point the camera and read the Kelvin value sooner. • FREEZE, calibration, Photography WB Assist, Saved and Reference work as before. • Saved readings, calibration and settings carry over unchanged.

The developer, Kyu-Hee Jang, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data
  • Data Not Linked to You

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

    • Identifiers
    • Usage Data
    • Diagnostics

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

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

Seller
Kyu-Hee Jang
Size
96.3 MB
Category
Photo & Video
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • iPad
    Requires iPadOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
18+
Copyright
Copyright © 2026 Simon Jang. All rights reserved.