Growing App available

Came across this post on the CalHort Facebook page.

It’s an app for the Iphone, designed in Australia, but apparently generic enough by plant species. Here’s the description from somebody that I am assuming is one of the creators:

this app was designed to be as versatile as possible. The nutrient deficiency ID tool is applicable to almost any plant or crop, as is the information on individual nutrients in plants and includes some crop specific information. The soil pH nutrient availability guide is also application to any field-grown situation. The app also includes foliar fert application rates for broadacre crops, tree crops and field veg, and also includes a range of crop specific fertigation rates.

Can someone with an iphone comment on whether this work for local plants and gardens?

Looking forward to a bountiful growing season  (once the snow stops!)