[ How to select English words ]
* Derivative words whose meaning is clearly easy to predict for English learners who have already acquired intermediate-level vocabulary from 4,000 English words at the word level of 12,001 to 16,000 selected by vocabulary usage frequency analysis (adverbs such as "additionally," "environmentally," and "genetically," which are just basic words with 'ly' added), and words that are widely recognized by Japanese as katakana, have been deleted, and summarized into 3,000 words. Words up to the 12000 word level will not appear.

* 3000 words, all with example sentences and voice (machine voice in American, British, Australian and Indian English).

* It is completely an English word application for advanced English users. CEFR C2 level, IELTS8.0~9.0, TOFEL iBT 112~120, United Nations Eiken Special Class A, Cambridge Eiken CPE. Recommended for those who want to read English newspapers smoothly, and for advanced English learners who want to close the gap with native English speakers.

* We thought that too many Japanese translations, such as dictionaries, would hinder English learners from learning English words efficiently. I try to include only the core meaning of English words.

[ Below is the system introduction of the app ]
* In addition to the standard flash card mode, you can also select a mode to learn from sentences. You can naturally remember English words in context.
* In the 4-choice test mode, you can always check your ability.
* You can review words that you are not good at later.
* Thorough attention has been paid to ease of use.
* It also supports dark mode.
* You can customize the color and font size of the question screen.
* In list mode, you can study listening by switching the audio playback method at the bottom left of the screen even in the background state.