YES – This is Otchenash Sviatoslav’s app YES – These are Otchenash Sviatoslav’s hands YES – Now you have possilibity to learn and develop your skills every moment you have, straight from your device. OS.Course is free to download. Content of the app can be bought through In-App Purchases. We are dedicated to develop the permanent make-up sector across the world. We created OS.Course app for educational purposes and global reach. We hope you like the possibility to learn from OS.Course app and will visit Otchenash Sviatoslav’s webpage and online store. Especially good companion for OS.Course app is OS Basic course workbook.