SPECIFIC LEAF AREA & INDEX

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 • 95 Mentions in Published Papers
This is Petiole Pro usage statistics for leaf area meter in smartphone
Trusted by 315+ organisations
Join the 16 430 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
Petiole Pro: Map of countries with the highest number of customers

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LIVE AMA WEBINAR

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 and quality assurance with smartphone 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, print calibrating DIY calibrating plate or buy it, take smartphone with you to the field or lab. Yes, the app works without internet connection!
2️⃣ Take photo of your leaf on calibrating plate or next to it, on a contrast background. Make sure you see all eight markers on the calibrating plate - this impacts accuracy.
3️⃣ Record measurements or save them right in the app.
How does Petiole Pro work for leaf area measurement? Just follow these three steps: take an image of the leaf on a calibrating plate or next to it, upload the image to Petiole Pro, and receive measurements for leaf area, leaf parameters, leaf width, and leaf length—all from one photo.
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 Pro or ImageJ?

We believe that Petiole Pro is the next-level generation for leaf area measurement with smartphones. You can check the comparison of results of Petiole Pro measurements, ImageJ and grid paper. Petiole Pro includes advanced leaf area algorithm you can check accuracy by yourself, using this free QA calibrating plate 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 March 2024, for Petiole Pro the accuracy is around ± 0.03 sq cm for small leaves.

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

Link to calibration pad for Petiole Pro is sent automatically to your email address. If you have not got it yet, check your Junk/Spam folder. You can also find DIY calibrating plates in the app. Otherwise, drop us an email to support@petioleapp.com

Can I use a ruler or a standard size coin for Petiole Pro and vice versa?

Calibration pads for Petiole Pro serve as a benchmark for measurements. In other words, calibration pads for Petiole Pro can be used only for this mobile application. It is not expected to use any other measuring ethalon as a standard for Petiole Pro measurements.

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

It's up to you. You can get precise data about the area of your leaves holding a smartphone in your hands. Also, you can get an accurate leaf area measurement placing your smartphone on a tripod or any other smartphone holder. We improved our algorithm and now a measuring stand is not crucially important to have it.

Where can I buy a measuring stand for Petiole Pro if I wish to use it?

In fact, you don't need to purchase anything! Many researchers utilize stacks of books, boxes, bottles, and tripods to support a smartphone, using this setup to maintain a consistent height for each measurement. If you prefer, consider purchasing a mobile holder, such as a 'lazy arm' or a similar product, to use for leaf area measurement. We will soon introduce several new accessories in the Petiole Pro Store to ensure you're fully equipped.

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 currently, particularly for students, PhD candidates, and researchers in agricultural institutions. Therefore, you can get Petiole Pro completely free.

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

Yes, we do. You can view the list of almost 100 research papers that feature Petiole Pro as a data collection instrument.

Need to know MORE about what Petiole Pro can do for you?
Watch videos below to see more detailed information about these powerful features inside of your Petiole Pro account:
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Petiole Pro offers the essential tools for accurately measuring various plant characteristics, including leaf area, leaf greenness, and counts of germination, root nodules, strawberry flowers, and blueberries. It also enables the measurement of length, width, diameter, and other characteristics of plant organs using a digital ruler. These capabilities facilitate the efficient completion of field experiments and Quality Assurance tasks.