PDF flachcards, made in Japan, gives you a great way of learning, e.g. foreign languages, by reviewing PDF books or comics . Whenever you read a PDF file, you can make a flash card of a scene that you want to review through just two-touch operation. (Flash cards are parts of a whole that you want to review to aid memorization through repeated practices.) The flash cards, each card has books or comics' one scene, help you memorize scenes efficiently and effectively. 【recommended for those who ...】 ・wants to search and review PDF files with post-it. ・wants to memorize phrases using books or comics. ・is on overseas business trip and wants to get high level foreign language skills. ・wants to learn books or comics by spaced repetition for TOEFL or TOEIC. ・learns foreign languages using books or comics. 【features】 ・various features of review that is customizable to objects or your abilities. ・easy-on-the-eyes mode ・vocabulary flash cards with PDF files,