Uben is a free online spaced repetition learning platform that helps you master any subject. Create custom flashcard decks, import decks from Anki, and study languages, sciences, coding, history, and more with smart review scheduling.

What subjects can I learn with Uben?

Uben supports learning any subject through spaced repetition. You can create custom decks for languages, sciences, coding, history, mathematics, and more. Anki import is available for Arabic, Chinese, English, French, German, Hebrew, Japanese, Korean, Russian, Spanish, Hindi, Turkish, and other languages.

How does spaced repetition work in Uben?

Uben uses intelligent spaced repetition algorithms to optimize your learning. Cards are shown at increasing intervals based on your performance, helping you remember information more efficiently. The system tracks your progress across all devices.

Can I import my existing Anki decks?

Yes! Uben supports importing Anki decks (.apkg files) for 10+ languages. You can also export your decks to KAnki format for studying on jailbroken Kindle devices.

Yes, Uben is completely free. There are no paid tiers or subscription fees. All features including custom deck creation, Anki import, progress tracking, and community marketplace are available at no cost.

How Many Flashcards Per Day Should You Review?

Published on 2026-07-20 • 6 min read • Study Tips

The right daily flashcard volume depends on your schedule and memory. Here is a practical framework for setting new-card and review limits that keep you consistent.

Why More Cards Is Not Better

The single biggest mistake new SRS users make is adding hundreds of new cards on day one. Every new card becomes future review load: over time, reviews accumulate roughly 3-5x your new-card rate. A burst of enthusiasm becomes an unmanageable mountain, and the app gets abandoned. Slow and steady wins.

A Practical Starting Point

For most people, 10-20 new cards per day with a 30-60 minute total review session is sustainable. If you have more time, 30 new cards works — but watch the load over the following week. The review queue is the real workload; new cards are just fuel. Uben's daily goals let you set the new-card and review caps independently, so you stay in control.

The Review:New Ratio

A healthy ratio is roughly 5-10 reviews for every new card. If you see 100 reviews waiting for 10 new cards, you added too many too fast. FSRS helps here because it spaces reviews adaptively, but you still need a sustainable daily cap. Consistency for six months beats intensity for two weeks.

Adjusting When Life Gets Busy

If you miss a few days, do not panic and do not try to catch up in one sitting. The forgetting curve is forgiving: just resume your normal daily limits and let the scheduler re-prioritize. Uben's emergency fallback even keeps your session usable when no cards are due, so a dead streak never has to become a dead habit.