ХиШник. Задачи по химии is a free Android app developed by Alekta that specializes in providing a comprehensive set of exercises for students preparing for the Russian State Exam (EGE) and Unified State Exam (OGE) in chemistry. The app consists of over 1500 tasks covering the entire school chemistry course from 8th to 11th grade, including basic, profile, and advanced difficulty levels, as well as Olympiad tasks. The app offers various modes of preparation for the exams, including more than 500 questions.

The app sets itself apart from other similar apps by providing a unique algorithm that analyzes the user's answers and provides detailed feedback. The app has all types of chemistry questions, including calculations, structural formulas, chemical equations, and electronic configurations. The app is an excellent tool to improve attention to detail and accuracy in formulating answers, essential skills for succeeding in the EGE and OGE exams. The app is designed for both individual and classroom use, providing a unique learning experience for students preparing for exams.