キオクSync 単語帳・暗記カードで復習

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About this app

【What is KiokuSync?】
You've studied, but you can't recall the information when you need it.

That's not because you're stupid; it's simply because your "review timing" is off.

KiokuSync is a flashcard and vocabulary app that delivers only "what you need to review today" using interval repetition (SRS) based on the forgetting curve.

With a single "Automatic Review" button, it prioritizes weak cards across decks. One tap each day completes your daily review.

Cards you repeatedly get wrong are automatically identified as "stuck," allowing you to take notes on your learning methods and overcome them.

Since AI automatically generates cards from text, images, and videos, the time spent "creating" vocabulary lists is virtually zero. You can focus on memorizing.

■ Recommended for those who:
・Forget what they've learned quickly
・Repeat looking up the same things multiple times
・Can't recall information instantly when needed
・Don't know when to review and end up not reviewing at all
・Stumble over the same cards repeatedly, only increasing the number of attempts
・Want to transform "thinking you understand" into usable memory for work
・Want to streamline AWS, information processing, TOEIC, LPIC, and English learning
・Have given up on high-functional memorization apps because they were difficult to set up
・Instructors and training managers who want to distribute decks to students in corporate training or schools

■ Main Features
【1】Review Notifications Before You Forget (Spaced Repetition - SRS)
Automatically notifies you at the optimal timing based on the forgetting curve. The interval widens from 1 day → 3 days → 7 days → 14 days → 30 days, achieving maximum retention with minimum effort.

【2】Automatic Review
Prioritizes weak point cards across decks. No need to think about "what should I do today?". Complete review with just one tap every day.

[3] Struggling Cards and Memorization Notes
If you get the same card wrong three times in a row, it will be displayed as "Stuck." Instead of just repeating the same steps, you can make notes of your own memorization methods, such as mnemonics or images, and review them when you look at the answer next time. It will automatically clear after answering correctly twice in a row. You can also see which cards you're struggling with at a glance on the learning preparation screen and the card list.

[4] Streamlining Flashcard Creation with AI
Automatically generates questions, correct answers, multiple-choice options, and supplementary explanations from text, images, and videos. Supports workflows where you can directly paste photos from textbooks, lecture videos, and AI-generated answers to create cards.

[5] Freely Switch Question Formats
Supports three formats: single question, multiple-choice, and input. You can switch the format, supplementary information, and correct answer rate display on the spot using the gear icon during learning, allowing you to use the same flashcards in different ways, such as "first getting used to the multiple-choice format, then finishing with input."

[6] Create and Manage via PC Browser Web Console
Cards can be created and managed not only from smartphones but also from PC browsers. Knowledge gained during work can be instantly converted into cards, allowing for review on your smartphone during your commute.

[7] Team/Instructor Features
Limited-access decks, student progress tracking, and invitation links enable the operation of corporate training, qualification schools, and learning groups. Students can receive decks simply by opening the distribution link. PDF printing of test papers is also supported.

[8] Learn Immediately with Popular Shared Decks
Start using high-quality decks created by other users, such as IT qualifications and business English, right away. Start with just one deck today.

■ Pricing
Basic functions are free. There is a limit to the number of uses for AI card generation.

Official Website: https://www.kiokusync.com
*Also searchable using "Kiokusync," "Memory Sync," or "kiokusync."

■ Terms of Service and Privacy Policy
Terms of Service: https://www.kiokusync.com/terms
Privacy Policy: https://www.kiokusync.com/privacy
Review your weak points daily using the forgetting curve. AI automatically generates flashcards from text and images. For qualifications, exams, and TOEIC.
Updated on
Oct 26, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    App info and performance
  • This app may collect these data types
    Personal info, Financial info and 6 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

いつもキオクSyncをご利用いただきありがとうございます。

【新機能】
・学習リマインダーの通知に「今日の復習:N枚」を表示
・リマインダー設定で次回の通知日時を確認できるように

【改善】
・学習した直後から次の復習予定を反映
・公開ライブラリの並び順を安定させ、デッキ名で検索できるように

【不具合の修正】
・共有デッキのダウンロード直後にホームに表示されない問題を修正
・進捗表示、フォルダ表示、ダークモード時の入力欄の見た目を修正
Content rating
Everyone
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App support

About the developer
Yumi Bo
cobo.memo.app@gmail.com
高松3丁目17−16 練馬区, 東京都 179-0075 Japan