Kyobo Book Center’s middle and high school reference books ranked #1 on the bestseller list*Hackers Voca etymology as well as Hackers Boca middle school series books andEasily memorize essential English vocabulary necessary for preparing for high school and college entrance exams with one application.(Books available in the app are updated sequentially)* Kyobo bookstore middle/high school reference books bestseller No. 1 (21.01.07, online weekly tally)▼▼ Systematic learning process ▼▼[STEP.1] Look at the words to be learned at a glanceYou can see all the words recorded by day at a glance, and you can easily learn through the word/Hangul meaning hiding function.[STEP.2] Word study cardThe word to be learned is through a word-by-word learning card.Learn headwords, pronunciation, meanings, example sentences, and derivative words in an automatic playback method.(Background play function is also supported)[STEP.3] Memorize according to your tasteAuto play, font size, hide word/meaning, set voice you want to hear,Memorize according to your taste by setting the voice playback interval and voice speed/repeat![STEP.4] ReviewWith 4 types of review games: Vocabubble, Matching, Example Review, and Voice ReviewMake memorized words your own.[STEP.5] My own vocabularyPut the words to memorize in your own vocabulary,Underlining words that are difficult to memorize, covering words/meanings, covering them with cellophane,Through infinite repetition learning and review, you can learn until you memorize words perfectly.We will guide you as follows about the access rights used by the app.Access rights are divided into essential access rights and optional access rights, and in the case of optional access rights, you can use the app even if you do not agree to the permission.• Required Access Rights• Storage spaceWith device photo media file accessTo store and play video and audioused.• phone callPUSH with dialing and management privilegesIt is used for environment setting.• Optional access rights• Camera and videoAttach photos/videos to Hackers• If you are using a smartphone with Android OS version 6.0 or lower, all of them can be applied as essential access rights without selective access rights. In this case, after upgrading the operating system to 6.0 or higher, you must delete and reinstall the app to set access rights normally.----Developer Contact:+8225375000