Statistics & Leaderboard
Track your learning progress with heatmaps, retention curves, and anonymous leaderboards.
Color-coded calendar shows your daily review activity. Deeper colors mean more reviews — a visual streak to keep you motivated.
7-day, 30-day, and all-time recall rate charts. See if your memory is improving over time.
Histograms of card stability, difficulty, and review intervals. Understand your knowledge base at a glance.
Compare new cards, reviews, total reps, and study time against other learners. Fully anonymous — no personal data exposed.
Visualize Your Progress
Heatmap Calendar
A GitHub-style contribution grid shows your daily review volume. Each square represents a day — the darker the color, the more cards you reviewed. Watching the calendar fill up is a powerful motivator.
Retention & Review Metrics
- Recall rate — line chart over 7d / 30d / all time
- Daily stats — cards reviewed, time spent, average rating
- Streak — current consecutive days and longest streak
FSRS Parameter Distributions
Understand the health of your card library:
- Stability histogram — how many days each card is expected to last
- Difficulty histogram — what proportion of your cards are easy vs hard
- Interval histogram — current spacing distribution
All charts are exportable as screenshots for sharing or personal record.
Anonymous Leaderboard
The leaderboard ranks participating users across four dimensions:
- New cards created this period
- Reviews completed
- Total lifetime reviews
- Study time
Your identity is anonymous — no username, email, or personal info is shown. Your rank updates automatically on each sync.
Leaderboard requires an active subscription.