Still wearing yourself out typing vocab on your phone?
Create fast on PC × memorize smoothly on mobile

Build your cards in bulk on your PC, then review on the go with the smartphone app. One account lets you keep studying anytime, anywhere.

Get Started for Free No credit card required · Sign up in a minute Download on the App Store Try it without signing up ↓
🖥️ Web (PC / mobile browser) 📱 iOS app

Try it right now — no sign-up

Try OBOERU with 10 basic TOEIC words. Tap a card to see the answer, then choose “Got it” or “Not yet”.

WEB × iOS

Use PC and mobile as the moment calls for

Manage your cards on your PC in the browser, and practice on the go with the iOS app. Both share the same account, so you can pick whichever fits the moment.

  • 🖥️ Create, edit and import cards comfortably on your PC
  • 📱 Run through quizzes on your phone whenever you have a spare minute
  • 🔄 Sign in with the same account and get the same card sets everywhere
Download on the App Store

Build your own flashcards

Register any question and answer to create your own vocabulary book (card set). It has a simple design and is easy to use.

Why choose OBOERU?

📱

Works on PC & mobile

No installation needed — just use your browser. There is also an iOS app, so you can manage cards on your PC and practice on your phone.

✅

Track your progress

Mark each card as remembered or not. See your card count and progress at a glance, and review only the cards you find difficult.

🆓

Completely free

Sign up and use OBOERU at no cost — no hidden fees for creating card sets or taking quizzes.

How it works

1

Sign up for free

Just register your email address and start using it right away.

2

Create a card set

Register the questions and answers you want to remember to build your own flashcard set.

3

Review & remember

Review repeatedly in quiz format to steadily lock in your memory.

Frequently Asked Questions

Yes, OBOERU is completely free to use.

Each card set can hold up to 1000 cards.

Yes, OBOERU works in any browser on both PC and smartphone, and an iOS app is also available.

Yes. Sign in with the same account and you get the same card sets, so you can build cards on your PC and practice them in the app.

Yes, you can delete your account at any time from your account page.

Get started for free today

Sign-up takes just a minute. Use the same flashcards seamlessly on the web and in the app.

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