Focus Range is a camera focus range calculation app developed by Tossy. The app offers an easy way to check focus range, focus position, and other related metrics with animation. It is designed to help photographers determine the appropriate focus range and position when taking photos, avoiding the common problem of photos appearing out of focus when viewed on a computer or printed in different sizes. The app is compatible with Android devices and is available for free.

The app provides a simple way to check focus range by setting the lens focal length, F-number, and focus distance. It also offers an easy way to switch between multiple cameras by setting the type of camera image sensor and the number of pixels. Additionally, users can adjust the accuracy according to the use, such as printing a photo in a large or small size.

One of the app's key features is its intuitive interface, which allows users to check the focus range and position with animation. The settings can be changed simply by scrolling the values, making it easy to operate with one hand. Users can also change the lens focal length range and F-number setting range according to the lens they own. Overall, Focus Range is a useful tool for photographers looking to improve the quality of their photos by ensuring proper focus range and position.