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
7 Years in Business • 11 300 Users • 2 200 Hours of Engagement • 3 000 In-Field Sessions • 6 500 Measurements • 23 Mentions in Published Papers
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Join the 11 234 visionaries who are actively using Petiole Pro to easily get leaf area measurements and their research & experiments out to the moon!
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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.

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.
Watch Demo:
In less than 10 minutes, you can measure what would have taken you hours to do...

"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 gives you THE TOOLS you need to measure leaf area, leaf greenness, fractional vegetation cover, count seeds & flowers and complete your field experiment on time!