Açı Video Çözüm is an Android app developed by FERNUS EĞİTİM TEKNOLOJİLERİ A.Ş. It is a free educational app that provides solutions to all the questions in the book. The app is designed to help students with their studies and enable them to find solutions to all the questions in the book.

The app has a user-friendly interface that makes it easy to navigate and find the desired solutions. All the questions in the book are solved, and the solutions are updated in the app as soon as they are completed. The app is available for free, making it accessible to all students who want to improve their knowledge and skills.