This application analyzes light to determine its dominant wavelength in nanometers, frequency in terahertz, and period length in femtoseconds. It provides real-time measurements and allows users to save their findings with notes. The app is designed for measuring colored light sources.
3.7.1
July 3, 2026
• Clearer readings at the edges of the measurable spectrum: out-of-range light now shows a consistent wavelength range, frequency and period length live and in your saved measurements. • Misc minor improvements Missing a feature? Let me know in a review!
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This app measures the light spectrum to determine the dominant wavelength in nanometers (nm), frequency in terahertz (THz), and period length in femtoseconds (fs). It is designed for analyzing colored light sources and providing real-time measurements.
Key features include high accuracy, real-time measurement, measurement of wavelength in nm, frequency in THz, and period length in fs. It also allows users to save measurements with notes, supports many languages, and offers optional calibration for enhanced precision.
The app is free to download and use, but it offers in-app purchases. These purchases may be for features like calibration or other enhancements to the measurement capabilities.
Smartphone cameras have inherent limitations in distinguishing very short or very long wavelengths. Accuracy may be limited below 465 nm and above 610 nm due to physical camera sensors. An automatic warning appears on the screen for these wavelengths.
This app is not meaningful for measuring white light as it consists of a wide range of wavelengths. It is made for measuring colored light. For measuring the color of a surface or material, you would need a different application like a Colorimeter Camera Color Meter app.
