Photometer PRO Subscriptions

Photometer PRO 12 Months

One year of full access to all PRO features

Equivalent to $0.67 / month

$7.99 billed annually (+tax)

Photometer PRO 6 Months

SAVE 16% - Six months of full access to all PRO features

Equivalent to $0.83 / month

$4.99 billed every 6 months (+tax)

Photometer PRO 3 Months

Three months of full access to all PRO features

$0.99 / month

$2.97 billed every 3 months (+tax)

Why buy a subscription to our product?

We’re excited to announce that we’re now offering a subscription plan for our product! This is a great way to get the most out of our product and help us improve it in the future.

Here are a few reasons why you should buy a subscription:

  • By purchasing a subscription, you are supporting the growth of the product: We do not have any additional funds, and the subscription will allow us to continue to grow the project. Many of us work on this project on a voluntary basis, and thanks to your support, we are able to cover some of our most urgent needs with the benefits of a subscription.
  • Unlimited access to all PRO features: Our PRO features are designed to give you the best possible experience with our product. With a subscription, you’ll have unlimited access to all of these features, so you can use them to their full potential.
  • Early access to new features: We’re constantly working on new features for our product. As a subscriber, you’ll get early access to these features, so you can be one of the first to try them out.
  • Help us improve our product: Your feedback is important to us. As a subscriber, you’ll have the opportunity to give us feedback on our product, which will help us make it even better.

We hope you’ll consider subscribing to our product. We’re confident that you’ll be happy with the experience.

Thank you so much for your support,
Przemek Pardel, Photometer PRO CEO

Photometer PRO Features


  • Exposure (EV) measurement (+Manual EV)
  • Lux / Foot-candle
  • F-number (F) or Shutter speed (SEC) automatic counting
    • App use 1/8 stop f-number increments: modern and professional electronically controlled interchangeable lenses, such as those used for SLR cameras, have f-stop specified internally in 1/8 stop increments
  • ISO sensitivity from 25 to 409600
  • Measurement Freeze mode & Sharing


  • Light sources options
    • Sunlight
    • Cool White Fluorescent Lamps
    • Mogul Base High Pressure Sodium Lamps
    • Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W
    • Metal Halide
    • Ceramic Metal Halide (CMH942): standard 4200 K color temperature
    • Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths
  • Measuring Daily Light Integral in a Greenhouse (Ariana P. Torres and Roberto G. Lopez, Department of Horticulture and Landscape Architecture, Purdue University)


  • Light volume (Lux or FC) to solar intensity (W/m2) conversion
    • Bright sunlight is approximately 136000 lux = 1075 W/m2. The factor changes slightly depending on time of the day, condition such as cloud cover, moisture in the air etc.
  • Real time light volume graph
  • Light recording


  • Create a room Lightmap – The light intensity map is used to check where the light is strongest and where the light is low

PPFD Calculator

Calculator (Light Calculator)

  • Count light space needs based on the area type and size (Lumens)
  • Count number of bulbs needed to light the area (Information on the number of Lumen of the bulb can be found on the packaging)
  • Lumens measure how much light you are getting from a bulb. More lumens means it’s a brighter light; fewer lumens means it’s a dimmer light. Lumens let you buy the amount of light you want. So when buying your new bulbs, think lumens, not watts.
  • A typical household light bulb might emit anything between 300–1000 lumens, while a high-powered floodlight could emit in excess of 20,000 lumens.

Calculators (Lux & FC / Lumen / Wats)

  • Lux (FC) to Lumen calculation
  • Lumen to Lux (FC) calculation
  • Lux (FC) to Candela calculation
  • Candela to Lux (FC) calculation
  • Lux (FC) to Watts
  • Watts to Lux (FC)
  • Units: meter and feet

Additional features

  • Unlimited CSV export
  • Full samples frequency
  • Sensor calibration