ANCHOKO ANCHOKO 日本語 · 中文

Red pen, hidden
for you

Photograph your notes or textbook and get flashcards. Anything you wrote in red pen is found and covered for you, so you can leave the red filter sheet at home. Photos are processed on your device and never sent anywhere.

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Sound familiar?

ANCHOKO solves it all!

Powerful Features

Everything you need for efficient learning

Image Occlusion

Mask parts of images and quiz yourself. Perfect for memorizing anatomy diagrams, maps, and circuit diagrams.

Image Annotation Cards

Write directly on images to create flashcards. Add handwritten notes and arrows for visual memory retention.

Cloze Deletion Cards

Hide key parts of text as {{fill-in-the-blank}} questions. Great for memorizing keywords and terminology.

Spaced Repetition (SRS)

Algorithm based on the forgetting curve presents review cards at optimal timing for long-term memory retention.

Audio Recording & Playback

Record and add audio to cards. Useful for pronunciation practice and listening exercises.

Quiz Mode

Test yourself with multiple choice, written, or mixed formats to comprehensively check your knowledge.

Learning Statistics

Visualize daily study progress with charts. Track streaks and card status to stay motivated.

Multi-Device Sync

Access the same account from iPhone, Android, and web browser. Continue learning from any device.

Explore All ANCHOKO Features

A comprehensive toolkit for efficient memorization

Annotation Cards

Take photos of textbooks or notes and add markers and annotations directly on the image to create flashcards. With freehand flexibility, add annotations on top of images. Perfect for efficient review before exams.

Image Occlusion

Hide parts of diagrams, maps, or anatomical images to turn them into questions. Especially effective for medical, geography, and science memorization. Customize the color and size of hidden areas, and create multiple questions from a single image.

Cloze (Fill-in-the-blank) Cards

Create fill-in-the-blank cards by turning key words in sentences into blanks. Perfect for language learning, legal texts, historical dates, and other text-based memorization. Set multiple blanks on a single card.

SRS (Spaced Repetition) Learning System

The scientifically proven spaced repetition algorithm reminds you to review at optimal intervals based on the forgetting curve. Difficult cards appear more frequently, while mastered cards appear less often. Efficiently transfer knowledge to long-term memory.

Audio Recording & Listening Study

Record audio on cards to create listening-enabled flashcards. Supports ear-based learning for pronunciation practice, foreign language listening, and music terminology. Great for hands-free study during commutes.

Detailed Study Statistics & Analytics

Visualize daily/weekly study time, accuracy rate, study streaks, and card-level mastery in graphs. Identify weak areas for focused review and stay motivated with progress tracking.

Available in 8 Languages

Fully supports Japanese, English, Chinese, Korean, Spanish, French, Vietnamese, and Thai. Every feature works in your native language, making it accessible to learners worldwide.

Works in your browser too

Study straight from your browser without installing anything. Sign in with the same account and your cards are there.

Pricing

The free plan is enough for daily study. Go Pro when you start building a lot.

Free（App and browser alike）

ANCHOKO Pro

Monthly, yearly or lifetime。 The exact amounts are shown on the purchase screen in the app, taken live from the store.

Download the App

Study on your smartphone too. Learn anytime, anywhere with iPhone & Android apps.

App Store Google Play

61 printable diagrams (no labels) · FAQ