Stats, in the bottom navigation bar, opens your global statistics: every deck and card you have, combined, at the widest zoom level described in How statistics work.
This article covers the totals, quality breakdown, maturity, language, study time, and session numbers on that screen. Your streaks, activity history, and due-cards forecast are covered separately, since they're about change over time rather than a snapshot.
Overall totals
At the top of the screen: your total card count, deck count, and current day streak.
Further down, under Study Time, your total review time across every review you've ever done.
These four numbers only grow. Deleting a card or a deck doesn't erase the reviews already counted here; see Deleting a flashcard and Deleting a deck for what deletion does and doesn't affect.
Review quality
The Review Quality card shows a donut chart of every review you've done, split into the four ratings: Again, Hard, Good, and Easy. Tap a segment to see its exact count and share of the total.
Below the chart is a retention rate, with a Standard / True toggle above it. Switching the toggle recalculates the number and its label. Both are explained in full in Retention explained; this screen is where you'll actually see them.
Card maturity
The Card Progress card shows a horizontal stacked bar: New, Learning, Relearning, Young, and Mature, in that order. Tap a segment, or its legend pill below the bar, to see its count and percentage.
This is a live count of every card you own, grouped by the same states covered in Card states. Nothing here redefines what those states mean; it just tells you how many cards currently sit in each one.
Cards by language
Below card maturity, Cards by Language lists every language pair you study, with a count for each. A card contributes to both its front and back language, so a card translating English to Japanese adds one to each.
Average deck size, the number of cards divided across your decks, appears as a single row above this list.
Study time
The Study Time card leads with your total time spent reviewing, all-time.
Below that, a bar chart of your recent daily study time. A toggle switches the window between 7, 14, and 30 days; switching it re-scales the chart to the newly selected window rather than reloading anything. Each bar is labeled with the time spent that day, and tapping a bar shows its exact duration; the chart switches from minutes to seconds automatically if your recent sessions are short. The badge above the chart totals whichever window is currently selected. Two rows underneath give your daily average across only the days you were actually active, and your average duration per individual review: both of these stay all-time regardless of the chart's toggle.
Session numbers
The Session Behaviour card closes the screen with four numbers describing how you actually study, rather than what you've reviewed:
| Metric | What it means |
|---|---|
| Average session length | The average number of cards reviewed per sitting. A session ends after a 30-minute gap with no reviews. |
| Biggest session | The most cards you've reviewed in a single sitting. |
| Total sessions | How many separate sittings you've had, by the same 30-minute rule. |
| Average interval | The average scheduled gap between reviews, across cards that have graduated to the Review state. A longer average means FSRS is waiting longer before showing those cards again. |
Note
Average interval only counts cards in the Review state. New, Learning, and Relearning cards don't yet have a stable interval to average.
What's covered elsewhere
This same screen also shows your current and longest streak, active/inactive day counts, a due-cards forecast, and a card growth chart covering both cards created and cards learned. Those are grouped into their own article since they're about activity over time, not a running total; see Activity, streaks, and forecast.