Modern camera of digital single-lens reflex (DSLR) comes with a variety of features to help the user get a better image quality. For professional photographers, many of them use manual mode to get better control over their camera. However, it may become difficult issue for beginner and amateur photographer as they need to know the basic knowledge of taking a photograph. For this reason, the Android application, DSLR-Tutor was developed to assist the beginner and amateur in digital photography to understand a few modes available for the camera as well as the important three basic rules, which are international standards organization (ISO), aperture and shutter speed. This DSLR- Tutor was developed using Android Studio v3.2.1. with a minimal ...