キオクSync - 暗記カード・単語帳

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About this app

【What is KiokuSync?】
KiokuSync is a flashcard app based on Spaced Repetition Series (SRS) that transforms "thinking you understand" into "usable memory."
It reminds you to review at the optimal time based on the forgetting curve. With just one "Automatic Review" button, it prioritizes presenting cards for your weak points.
It also features an AI function that automatically generates cards from text, images, and videos. This significantly reduces the effort required to create flashcards.

■ Recommended for people who:
・Forget what they've learned quickly
・Have to look up the same things over and over
・Can't recall things instantly when needed
・Don't know when to review
・Want to transform "thinking you understand" into usable memory for work
・Want to streamline AWS, information processing, TOEIC, LPIC, and English learning
・Instructors and training managers who want to distribute decks to students in corporate training or schools

■ Main Features
【1】Review Notification Before You Forget (Spaced Repetition Series/SRS)
Automatically notifies you at the optimal time based on the forgetting curve. The interval between reviews widens from 1 day to 3 days, then 7 days, 14 days, and finally 30 days, achieving maximum retention with minimal effort.

[2] Fully automated review
Prioritizes weak point cards across decks. Daily review is completed with just one tap.

[3] Streamlined vocabulary and flashcard creation with AI
Automatically generates questions, correct answers, multiple-choice options, and supplementary explanations from text, images, and videos. Supports workflows where ChatGPT answers are directly pasted into cards.

[4] Creation and management via PC browser web console
Card creation and management are possible not only from smartphones but also from PC browsers. Cards can be created on the spot during work.

[5] Team and instructor features
Limited-access decks, student progress tracking, and invitation links enable operation of corporate training, qualification schools, and learning groups.

[6] Instant learning with popular shared decks
Immediately start using high-quality decks created by other users, such as IT qualifications and business English.

■ Pricing
Basic functions are available for free. There is a limit to the number of uses for AI card generation. Official Website: https://www.kiokusync.com

■ Terms of Service and Privacy Policy
Terms of Service: https://www.kiokusync.com/terms
Privacy Policy: https://www.kiokusync.com/privacy
Review your weaknesses daily with AI-generated cards and spaced repetition (SRS) for solidifying your knowledge of qualifications and languages. Basic version is free.
Updated on
Aug 18, 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

■ キオクSyncへ新装
これまでの「Cobo Memo」から、アプリ名を「キオクSync」に変更しました。機能はそのままお使いいただけます。

■ 不具合修正
・共有デッキの同期が途中で止まってしまう場合がある不具合を修正
・学習の準備画面を開き直すと、カード枚数が増えて表示される不具合を修正
・共有デッキの配布リンクから正しく取り込めない場合がある不具合を修正
・その他、細かな表示・動作の不具合を修正しました
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