Quickly Measure Accurate Leaf Area

That transforms your research or field experiment into breakthrough knowledge. Without having to rely on an expensive equipment.

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Forming The Future Of Plant Phenotyping
so students, researches and farmers can enjoy their forthcoming achievements
10 Years in Business • 11 300 Users • 3 200 Hours of Engagement • 3 500 In-Field Sessions • 8 500 Measurements • 75 Mentions in Published Papers
This is Petiole Pro usage statistics for leaf area meter in smartphone
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Join the 11 348 visionaries who are actively using Petiole Pro to easily get leaf area measurements and their research & experiments out to the moon!
Студенти в 🇺🇦 Уманському національному університеті садівництва використовують Петіоль для вимірювання площі листової поверхні Students at 🇲🇽 Universidad Veracruzana  use Petiole Pro for plant health monitoring Researchers at 🇬🇧 Aberystwyth University use Petiole Pro for plant science research
Науковці у 🇺🇦 Тернопільському національному педагогічному університеті імені Володимира Гнатюка використовують Петіоль про для досліджень у сфері рослинництва Agristudents at 🇺🇸 University of California, Santa Cruz use Petiole Pro for monitoring of plant development PhD candidates in bioscience from 🇹🇷 Erciyes University use mobile application Petiole Pro for leaf area measurement Research staff at 🇮🇳 Indian Institute of Science uses mobile app Petiole Pro for measuring plant traits in plant phenotyping Bioscience researchers at 🇮🇩 Bandung Institute of Technology use Petiole Pro to check plant health with smartphone
Students at 🇩🇪 Humboldt University of Berlin use mobile app Petiole Pro for leaf area measurement with smartphone Researchers and technicians at 🇫🇷 Institut des Sciences des Plantes use mobile application Petiole Pro for understanding impact of biotic and abiotic stress on plants and crops Ученые 🇷🇺 Федерального научного агроинженерного центра ВИМ используют мобильное приложение Петиоль Про для исследований в ботанике и сельском хозяйстве Students at 🇺🇸 Purdue University get leaf area measurement with Petiole Pro to assess the effectiveness of vertical farming method for growers PhD researchers at 🇬🇧 The Queen's University of Belfast work on development of compounds for hydroponic and aquaponic farming and Petiole Pro helps them to assess crops and plant health Students at 🇮🇳 Institute of Himalayan Bioresource Technology measure leaf area with mobile application Petiole Pro Agristudents at 🇺🇸 University of San Diego apply measurement of leaf area with smartphone for tracking plant growth with Petiole Pro Plant Scientists from 🇨🇦 University of Alberta published a research paper in Frontiers in Plant Science and referenced Petiole Pro as the digital leaf area meter for non-destructive measurements
Laboratory plant technicians at 🇪🇬 Alexandria University use mobile application Petiole Pro to save time on routine plant health assessment tasks Undergraduate plant students at 🇮🇳 R. D. National College assess plant development with Petiole Pro to get data about the growth of the crops Research staff at 🇪🇹 Haramaya University investigates salinity tolerance in tomatoes using mobile app Petiole Pro to measure leaf area and chlorophyll content Tissue technicians at 🇸🇦 University of Hafr Albatin use Petiole pro mobile application for digital leaf area measurement Technicians and researchers at 🇦🇺 Australian National University estimate leaf area using mobile application Petiole Pro Bioscience researchers at 🇸🇬 National University of Singapore get LAI and specific leaf area measurements with Petiole Pro mobile app Agri researchers at 🇵🇭 Romblon State University experimenting with application of biochemicals on crops and measure results with Petiole Pro Biolab Technicians at 🇺🇸 Stockton University use Petiole Pro smartphone app to measure LAI and canopy cover index Biokinetics researchers at the 🇧🇴 Public University of El Alto measure leaf area with smartphone to track the plant growth Agriculture undergraduate students at 🇿🇦 University of Cape Town PhD candidates in bioscience at 🇮🇹 University of Pisa measure plant health characteristics with smartphone
Map of countries with the highest number of Petiole Pro customers



Not sure if Petiole Pro is right for your research? Ask us anything at our weekly AMA style webinar.

Talk to the team live, and evaluate if Petiole Pro is right for your research. Join Maryna Kuzmenko from Petiole Pro while she talks through Petiole's plant data collection solution providing the answers you need to make your decision.

Join us at regular webinars to explain how digital plant phenotyping can help you with your agriculture business
What's A Petiole...?
What exactly is the difference between a leaf area meter and Petiole Pro?
Petiole Pro is a mobile application and leaf area meter in a smartphone for scientist and farmers
Yes, Petiole Pro was created so that smart people like you, who don't have expensive equipment, can easily measure precise leaf area using only the camera on a smartphone, to get more data for your experiment! Let me show you how it works:
1️⃣ Install the app, take smartphone with you to the field or lab. Yes, the app works without internet connection!
2️⃣ Fix smartphone on needed height, calibrate camera and measure leaf area in real-time.
3️⃣ Record measurements or save them right in the app.
How does Petiole Pro for leaf area measurement work? Follow just three steps: calibrate camera, place a leaf and measure leaf area instantly
Watch Demo:
In less than 10 minutes, you can measure what would have taken you hours to do...
Ahmet Say, Erciyes University Research Assistant, Turkey

"We used #petiole in today's land measurements. It has given us great convenience. It provided ease of measurement in the field instead of removing the plants from the soil and carrying them to the laboratory. Many thanks to the team that made the #petiole application."

— Ahmet SAY, Erciyes University Research Assistant

Here are a few other FAQs we get a lot:

What is better - Petiole App or Petiole Pro?

Still maintaining the Petiole App, we believe that Petiole Pro is the next-level generation for leaf area measurement with smartphones. Petiole Pro includes advanced leaf area algorithm and accuracy checking for each session to provide you with the most reliable data about your plants.

What is the accuracy of mobile application Petiole?

We constantly work on the accuracy of the leaf area algorithm. As of February 2022, for Petiole App the accuracy is around ± 0.2 sq cm for small leaves For Petiole Pro it's around ± 0.03 sq cm for small leaves.

Where can I get a calibration pads to measure leaf area?

Calibration pads for Petiole Pro as well for Petiole App are sent automatically to your email address. If you have not got it yet, check your Junk/Spam folder. Otherwise, drop us an email to support@petioleapp.com

Can I use Petiole Pro calibration pads for Petiole App and vice versa?

Calibration pads for Petiole App are not the same as for Petiole Pro. In other words, calibration pads for Petiole Pro can be used only for this mobile application. You cannot use them for Petiole App, only for Petiole Pro.

Do I need to have a measuring stand? Is it important?

To get accurate leaf area measurements you need to calibrate the camera and measure leaves from the same height. You cannot get precise data about the area of your leaves holding a smartphone in your hands. A measuring stand provides a fixed height and that's why it is crucially important to have it.

Where can I buy a measuring stand for Petiole Pro?

In fact, you don't need to buy anything! Many researchers use a pile of books, boxes, bottles and tripods to place a smartphone on and use this height for each measurement. If you wish - buy any mobile holder such as "lazy arm" or something similar and use it for leaf area measurement. Finally, we can send you files for a 3D printed measuring stand - just let us know.

I am a student and cannot pay for Petiole Pro. Do you have any credit options?

Yes, sure! We understand how challenging the situation is now, particularly, for students, PhD candidates and researchers in agricultural institutions. Hence, you can get Petiole Pro completely free if you are eligible and successfully submit the application.

Do you have a list of all scientific papers, which use your mobile application for leaf area?

Yes, we do. You can see the list of 24 research papers, which feature both Petiole Pro and Petiole App.

Need to know MORE about what PetiolePro can do for you?
Watch videos below to see more detailed information about these powerful features inside of your PetiolePro account:
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PetiolePro provides the necessary tools for accurately measuring leaf area, leaf greenness, canopy coverage, counting seeds and flowers, and completing field experiments efficiently.