Photometer PRO 🌞

While knowledge is limited, your imagination is endless.

Please check my side project: Lux Light Meter & Tools – Photometer PRO.

Feel free share your feedback with me.

Official website:

The Photometer PRO is the project with a bold vision:

Provide free and open access to light measurements and knowledge to everyone around the world.

Current state (March 2021)

  • 254k+ Downloads
  • 61,2k+ Active users
  • Reviews: 4.6 / 5.0 (2k+ reviews)

Light impacts human health and performance by enabling performance of visual tasks


Free application to measure the amount of light (in lux), reaching the ambient light sensor. The ambient light sensors measure light in lux, a measure of illumination that depends on the amount of incoming light and the area over which it is spread. 
Easy and simple. Measure the amount of light and share all results.


  • No ads
  • Free
  • Support 16 languages
  • High accuracy light measurement
  • Export all measurements (lx, fx, W/m2) to CSV file and work with the data like a professionalist!
  • Lux and Foot-candle units
  • Measures & record minimum, average and maximum brightness possible
  • Full light sensor calibration
  • Photovoltaics module – Read the brightness of the sky, walls or bright objects
  • Share and export measurements
  • Helps with selecting light bulbs to install at home and installing a new lighting
  • Help relighting school, kitchen, office and rooms
  • Analyze the light level of indoor environments
  • Measure indoors & outdoors. Compare the room’s brightness level.
  • Light meter to do experiments
  • Test flashlights and other light equipment
  • Setup projector screen
  • Tool for photographer
  • Smart, minimalistic, simple and intuitive user interface (Material Design + WCAG 2.0)
  • Instant start & excellent performance
  • Ready for professional & productive usage