Petiole: Plant Leaf Area Meter

★★★★★ Wonderful and very useful app for Biologists. If options like saving data, and exporting as CSV would be wonderful.

★★★★★ Fantastic app and works perfectly - probably the best free one. I don't understand the reason behind all the negative reviews though....

★★★★★ мені про Петіоль розказав колега, коли ми робили досліди з біосимуляторами на кукурудзі, міряли площу листя, усе працювало справно

★★★★★ Хорошее и полезное приложение для тех, кто работает с фенотипированием растений

★★★★★ No precision, much much variation in compare to licor leaf area meter

★★★★★ I found this app in 2019 and used it not regularly, but recently I've started work on my research of vegetable plants (root vegs) and now use it almost every day. I measure 50 - 100 leaves every day and the app works fine. (My phone is Xiaomi Redme 9A)

★★☆☆☆ I have calibration pad. Nothing happens after pressing setup button.

★★☆☆☆ Absolutely waste of time. I don't understand why this app is not working even after saying it's compatible with my mobile model. Is there any specific way to calibrate the app? After I start the calibration process, it doesn't allow to set up. How can I work?

★★☆☆☆ Measurements precision is okay, but some parts of the app don't seem to work... There seems to be no way to see previous measurements: When you tap the bottom part of the screen, there is a General tab with the total area of all leaves, and the Leaves tab, that is empty even after you take several measurements... The app counts the plant ID number up, but there is no way to review data on previous plants and/or leaves... What if I want to delete a leaf measurements that wasn't taken correctly?.. Also, it would be useful to have the log of all measurements with pictures of the leaves - thumbnails, at least... The obvious ability to add notes to the measurements is also missing... Another small issue - on Android 10 with the new navigation gestures, the bottom part of the UI is covered by the Android app switching line... At this point the app is just functional enough to be useful in some situation, but certainly not in a lab...