Learning state lifecycle

1. Regular page — editable note, not scheduled
2. Learning enabled — page receives learning state
3. Review eligible — due date arrives or page is overdue
4. Graded — self-assessment with Again, Hard, Good, or Easy
5. Schedule updated — next review date and history change
6. Preserved — backup or export depending on your goal

Each step applies to the page as a whole. Questions are optional prompts along the way. They do not replace the page or create separate flashcards.

A regular page is an editable note in your workspace.

• You can write, edit, and organize content freely.
• The page may contain nested child pages.
• You may attach optional questions as recall prompts.
• The page is not scheduled for review until learning is enabled.

Parent pages and child pages are separate pages. Each has its own content and, later, its own learning state if learning is turned on.

When you turn on learning, the page becomes a learning page and receives a learning state.

• Stability — how strongly the page is held in memory
• Difficulty — how hard the material feels for you
• Next review date — when the page becomes due
• Review history — recorded after you begin grading

New learning pages begin in the learning phase with short steps between reviews. After three cumulative Good or Easy successes, the page graduates to review with longer spaced-repetition intervals. Questions remain optional and do not control whether the page is due.

See Learning phase vs review phase for how the two phases differ.

Yuhimo uses FSRS-light to update these values over time based on your ratings.

A learning page becomes eligible for review when its next review date arrives.

• Due means the review date is today or already in the past.
• Overdue pages stay due until you review them.
• Regular pages never appear in review sessions.

Due pages can appear in the main review session. Scoped learning sessions let you review a specific branch or topic, including pages that may not be in today's global queue.

During review, you self-assess your recall. Yuhimo does not check correctness automatically.

• Again — you mostly forgot the material
• Hard — you remembered it with effort
• Good — you remembered it well enough
• Easy — you remembered it clearly

These ratings are scheduling signals, not exam scores. See Self-assessment for how to use them.

See One grade per day for why this limit exists.

When you submit a valid rating, Yuhimo updates the page's learning state.

• Stability and difficulty adjust based on your grade
• The next review date is recalculated
• The review is added to the page's history

The page leaves today's due queue until its new review date arrives. If you rated Again, the next interval is usually shorter. If you rated Good or Easy, the interval may grow.

If you graded by mistake, Yuhimo may offer undo for a few seconds afterward. Undo restores the previous scheduling state for that grade only — it is not backup restore or full history editing. Once the undo window passes, the grade stays in review history.

The review scheduling model describes how these pieces fit together.

Review timing affects how much the schedule changes.

• Early reviews — reviewing before the due date gives less scheduling progress
• Late reviews — successful overdue reviews may allow more progress than an early review of the same grade

See Early and late reviews for how timing interacts with stability and retrievability.

Learning state can outlive a single review session. How you preserve it depends on the tool you use.

• Backup — structured Yuhimo file for recovery or migration; can preserve learning state and review history
• Export — content-oriented output such as HTML, TXT, or PDF; meant for reading outside Yuhimo, not full state restore

If you need to preserve scheduling progress, use backups. If you need readable content elsewhere, use import / export.

Pages — the core unit for notes and structure.

How learning pages work — what changes when learning is enabled.

How reviews work — the review session flow.

FSRS-light explained — stability, difficulty, and retrievability.

Early and late reviews — timing effects on scheduling.

Learning phase vs review phase — phases, graduation, and grading rules.

One grade per day — the review-phase daily limit.

Backups and restore — preserving learning state.

Import / Export — content-oriented portability.