Farmers Grazing Calculator is a free iPhone application developed by Josh Bury, a New Zealand farmer. The app is designed to help farmers calculate feed for their animals. It allows them to calculate the right break size required, estimate the number of days grazing available in a paddock or crop, and determine how much feed their stock is currently getting.

One of the most notable features of Farmers Grazing Calculator is its ability to find location distances using the device's GPS. This feature is particularly useful for farmers who need to know the distance between two points. The app also includes the option to add supplement feed into the calculation, with common types of supplement feed referenced to find dry matter percentages.

The app's design is made to suit outdoor use in bright areas, and it is easy to navigate and use. Farmers Grazing Calculator is an essential tool for farmers who need to calculate feed for their animals quickly and accurately.