iPhone Screenshots


The Leaf Doctor performs quantitative assessments for plant diseases on plant organs such as leaves. Users collect or submit photographs of diseased plant organs and calculate the percentage of diseased tissue. Through a user’s touching of the device screen, the algorithm employs user-specified values for up to eight colors of healthy tissues in the photograph. The color of each pixel is then evaluated for its distance from the healthy colors and assigned a status of either healthy or diseased. Users may slide a threshold bar until satisfied that diseased tissues are represented accurately before the percentage calculation. The assessment data and photographs may be sent by e-mail to any recipients. Instructions for using the app are provided on the About screen. The Leaf Doctor was produced by the University of Hawaii at Manoa, College of Tropical Agriculture and Human Resources.

What’s New

Version 1.1

Compatible with iOS 11

Ratings and Reviews

2.1 out of 5
8 Ratings

8 Ratings

Liddi1234 ,

Didn’t help with diagnosis

Now I know that my tomato leaf is 49% diseased with a mystery illness.

rhren ,

No help. Worthless

Says the my plant is diseased. That I knew. Now tell me what it is and what i can do about it.

Want a refund now........ ,

Take a leaf sample to your local nursery instead

Now I know my leaf samples are 79% diseased with some mystery illness, LOL. Why is this even in the App Store?!?!


University of Hawaii
3.4 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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