The Purdue Tomato Doctor app was designed to assist tomato growers in the identification of pests and diseases on their plants. The app provides hundreds of photos to help detect exactly what the problem might be. The user can search their tomato problem by image, by the section of plant that was affected, or by what the user guesses the issue to be. This is a paid app and is available to Android and IOS operating systems.
Apps by Developer Purdue University