Your daily three

Daily score 0 / 3 Today’s challenge: master three ideas.
Your week

A daily card for each selected topic. Written ideas first, then spaced revisits to make them stick.

Explore intentionally

Knowledge library

Follow your curiosityBrowse written cards or explore a clearly labelled Wikipedia source preview.

Your collection

Saved ideas

Make it stick

Review your learning

Missed questions first, then older ideas. Recall the answer before reading again.

Daily learning Explore topics Privacy

No account needed · Your topics, streak and saved cards stay on this device.

Make it yours

What do you want to understand better?

Choose the subjects you’re curious about. You’ll receive a daily card from every selected topic, with earlier ideas revisited when you finish the written collection. No account is required.
Read and learn

Help make this better

Prepare a report, then submit it on GitHub. A GitHub account is required. Reports are public; do not include personal information.

At least 10 characters. Your message is not sent automatically.

Keep your learning safe

Download your progress before changing phones or clearing browser data. No account needed.

Save a backup

Includes saved ideas, completed cards, quiz answers, review dates, topics and language.

Restore on this device

Open One Card Wiser on the other device and choose your backup file here. Devices will not sync automatically.

The file stays on your device. Nothing is uploaded, and analytics consent is not included.