I haven't written on it with pens or markers, and I mainly used the included app (see the third image) as a study aid. I would occasionally check the contents, so I don't think it feels very used. I am selling it because the exam is over. I have already registered for the app, so even if you could use it, it would likely be for a short time. If you are interested, please consider it. The following is from AI: A textbook for the Certified Rental Property Manager exam that supports digital learning. - Title: Certified Rental Property Manager: How to Pass - Publication Year: 2025 - Price: 2400 yen - Digital Learning Support: Available on smartphones and tablets - Usage Period: June 1, 2025 to November 15, 2025 - Operating Environment: Android 8 or later, iOS 10 or later, Windows 10, MacOS X - How to use the app: You can solve "question and answer" problems Thank you for viewing.