Link: https://play.google.com/store/apps/details?id=com.first.Anki_blank At third grade of university, I wanted to study and memorize easily. I wanted to create some software tool can help memorizing. I already knew what is Anki. It manage restudying interval by how user feels difficult. However, I wated more. Instead of Anki's card based method, I wanted to PDF method. Importing PDF file into device, create blank covering what user want to memorize. Each blank works as like Anki card. User reveal the blank, check answer and rate how was difficult. I learned coding myself and deployed my first project to Google playstore. And promoted it to school community. This app was 150+ downloaded. Thankfully, some user encourage it was helpful. However, it was not succeesful to keep staying. There are several reasons I think : 1. I was not skillful at coding enough. This was my first project and wasn't able to do what I want freely. 2. Lack of advertising. I just promoted to school comminity single time. 3. I doubt to Ad + subscription was good BM. Honestly, I abandoned the app long time ago. Currently, it doesn't work well technically. However, I remember how some user's good reactions nad encourages were. I plan to remake it in near future.