Your memory, mapped over time.

Every review writes a data point. Revu turns that stream into retention curves, mastery trends, and per-topic time-on-task. Pull up a course, see exactly which topics are fading, and route your next hour where it matters.

Retention curvesMastery trendsTime-per-topicExam readiness forecast

Biology 101 · Memory dashboard

Last 30 days · 186 cards tracked

+36% this month

Retention

0.91

+0.08

Mastery

72%

+12%

Time / week

4.2h

−0.4h

Velocity

3.1/d

+0.7

Overall retention

Trending upward — 0.55 → 0.91 over 30 days

target 0.9
30d ago15d agoToday

Top 3 topics · 7-day mastery trend

Cell Biology
95%
Molecular Genetics
72%
Ecology
28%
What you'll see

Four dimensions of memory.

0d

Rolling window

Trends auto-compute across the last 30 days.

0

Core KPIs tracked

Retention, mastery, time, velocity.

0d

Forward projection

Exam-readiness forecast for the next two weeks.

0%

Exportable

CSV per chart, JSON for full analytics.

Retention curves

Watch your memory live.

Every review writes a data point. Revu plots retention over time per course, topic, and card. You see the peaks, the dips, the plateaus — and the exact moment something starts slipping.

  • Live per-card retention

    Derived from FSRS state — updated after every review.

  • 30-day history

    Rolling window with daily granularity.

  • Decay detection

    Automatic alerts when retention drops below 0.8.

Retention · last 30 days

0.91
RetentionTarget 0.9
Topic heat map

Where should tomorrow's hour go?

See every topic's mastery, retention trend, and time-on-task at a glance. Topics with high return-on-study float to the top — Revu tells you literally where the next hour is most valuable.

  • ROI per topic

    Expected retention gain per minute invested.

  • Filterable

    By state, by trend, by recency, by section.

  • Drill-through

    Click any topic to see cards, reviews, timeline.

Tomorrow’s ROI ranking

1Gene expression
92
2Ecosystems
78
3DNA structure
56
4Mitosis
34
5Cell membrane
12
ROI = projected retention gain per minute
Exam readiness

Know if you're on pace.

Add an exam date. Revu forecasts your retention per section on that day, projecting forward from your current trends. You see a red/amber/green signal per section and an overall 'Ready / On pace / At risk' label.

  • Exam-date-aware

    Forecast runs against your real exam schedule.

  • Per-section signal

    Every section gets its own readiness light.

  • Actionable

    Amber/red sections feed directly into tomorrow's plan.

Exam readiness

Biology 101 · Midterm in 18d

On pace
Unit 1 — Cellular94%
Unit 2 — Genetics72%
Unit 3 — Ecology38%
Forecast: retention on exam day, at current pace.
Four views

Analytics that answer real questions.

Not dashboards for dashboards' sake. Each view exists to answer a specific question you actually ask during exam prep.

Am I remembering?

Retention curves per course, topic, and card. See the trend line move in real time.

Where should I study next?

ROI-ranked topics. The highest-leverage hour surfaced explicitly.

Am I spending time right?

Time-per-topic breakdown. Catch hours sunk into already-strong sections.

Am I ready for the exam?

Forward projection per section. Red/amber/green signal against your exam date.

Where am I over-confident?

Confidence calibration — sure-and-wrong answers, the most dangerous ones, get surfaced first.

Am I getting faster?

Velocity — cards mastered per day. Track whether your rate is sustainable.

Frequently asked

Memory Analytics, answered.

Retention is the probability you'd recall a specific card right now (derived from FSRS). Mastery is a rolled-up score per topic or section — a weighted average of retention across all cards in that scope, plus stability trends.

Study with data, not vibes.

Know exactly where you stand, where you're going, and where the next hour should land.

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