enTeacher is an Android application designed to help users learn and improve their English language skills. It offers a collection of exercises and tests on various difficulty levels that cover different aspects of the language such as vocabulary, grammar, and usage. The program also provides options for changing the language of the interface and sound settings.

Users can choose between two modes, LEARN and TEST. In LEARN mode, the program repeats the questions until the user answers them correctly. TEST mode, on the other hand, asks each question only once and provides a score at the end of the test based on the percentage of correct answers.

The program offers six types of exercises, each represented by a different set of icons. These exercises include choosing the proper caption for the picture, dragging words to match with pictures, typing the name of the object in the picture, completing sentences, and listening comprehension. Different difficulty levels are represented by the color of icons. The program offers over 500 exercises, with 50 exercises available for free and the rest requiring payment.