One app. Every tool
students actually need.
Not a flashcard viewer. Not just a chatbot. Cue combines spaced repetition, personal tutoring, reading comprehension, multiplayer games, and math practice — each grounded in peer-reviewed cognitive science — into one free platform built for high school students.
Self-Calibrating Spaced Repetition
The most advanced free scheduling algorithm available.
Cue runs FSRS — the Free Spaced Repetition Scheduler, a peer-reviewed open algorithm that models your exact memory decay curve. Scheduling is per-card: each card carries its own stability and difficulty, updated every time you rate a review Again, Hard, Good, or Easy. Cue predicts when you're about to forget a card and schedules the next review right before that moment, targeting 85% retention. Over time it self-tunes — harder cards return more often, solid cards stretch to longer intervals. It's not a one-size-fits-all timer. It's a model of you.
- 85% retention target per card
- Intervals from hours to 365 days
- Adapts to your rating history
- 38% fewer reviews vs older algorithms
Your Personal Tutor
Explain it to me like I'm lost.
When you're stuck mid-session, don't just flip the card and move on. Ask Cue. Your personal tutor explains the concept in plain language, gives you examples, and walks through related ideas — without leaving your study flow. It knows what card you're looking at and explains it in context.
- Contextual explanations per card
- Patient, jargon-free breakdowns
- Near-instant responses
- Works in 10 languages
1,000+ Pre-Built Flashcards
Start studying in seconds. No setup required.
Cue ships with a curated library of flashcards across major high school subjects — biology, chemistry, history, and more. Organized by topic, chapter, and subtopic so you can jump exactly where you need to go. Every card is already formatted, fact-checked, and FSRS-ready.
- Biology, Chemistry, History, and more
- Topic → Chapter → Subtopic structure
- Chapter mastery tracking
- Weak-spot detection
Live Study Battles
Race your class in real time.
Share an 8-character join code and your whole class is in within seconds. Everyone gets the same flashcard deck. The leaderboard updates live as students answer. Wind Stream mode throws in fast-paced streaks — perfect for review days, test prep parties, or just making studying actually fun.
- 8-char live join codes
- Real-time leaderboard via WebSocket
- Wind Stream fast-round mode
- Works with any flashcard deck
Math Practice That Never Repeats
Unique problems, every time.
Math can't be studied with static flashcards — you need problems. Cue generates fresh algebra, geometry, statistics, and precalculus problems in real time, so you never see the same question twice. Each problem set adapts to the chapter you're in. No LaTeX, no formatting headaches — just clean practice.
- Algebra, geometry, statistics, precalculus
- Real-time generation — no repeats
- Tied to curriculum chapters
- Instant feedback and worked solution
Memory Analytics
Know exactly what's slipping.
Cue turns every review into concrete numbers: your retention rate, study streak, a 180-day retrievability heatmap, your weakest cards, and the chapters where recall is fading. It also surfaces weak spots across every mode — reading passages, reading quizzes, math, and writing — so you see the whole picture, not just flashcards. Each mode's mastery is shown side by side, never blended into one misleading number. You always know where to focus next.
- Retention rate & study streak
- 180-day retrievability heatmap
- Multi-mode weak spots (reading, ICAP, math, writing)
- Per-card health states (new → solid → fading → at-risk → overdue)
Classroom Tools
Assign, track, and print — without the admin overhead.
Teachers get a full classroom management layer: create classes, assign decks or topics, and watch mastery data roll in per student. Print formatted progress reports for individual students or the entire class. School admins can invite teachers and manage their school from one dashboard.
- Assign decks and topics
- Per-student mastery tracking
- Printable PDF reports
- School admin dashboard
Custom Flashcard Decks
Study your own material.
Create and study your own flashcard decks — then share them with a link. Anyone with the share code can save your deck to their account and start studying immediately. Great for group study, shared exam prep, or passing notes that actually stick.
- Create cards from scratch
- Shareable via link
- FSRS-scheduled like library cards
- Deck study sessions
AI-Powered Intelligence
Smarter tutoring. Near-instant grading.
Every AI-powered feature in Cue runs on a state-of-the-art model: the tutor gives sharper explanations, auto-grading is more accurate, and generated flashcards are higher quality. Grading used to take around 5 seconds per answer; it's now nearly instant.
- Near-instant answer grading
- Sharper, more accurate explanations
- Better flashcard generation
- Smarter session insights
Reading Passages
Assign passages. Answer questions. Right in the app.
Teachers can create reading passages and attach multiple-choice questions — either written by hand or AI-generated from a topic. Assign a passage to a class with a due date and students see it on their dashboard alongside their flashcard assignments. Students click to open the passage and answer the questions directly in Cue. Passages are organized by subject and searchable.
- Hand-authored or AI-generated passages
- Attach multiple-choice questions
- Assign to classes with due dates
- Students see assignments on their dashboard
Full-Length SAT Practice Tests
Real format. Adaptive difficulty. Free.
98 questions across Reading & Writing and Math, timed to mirror the real digital SAT. Module 2 is adaptive — score 65%+ on Module 1 and you get the harder path, unlocking a higher score ceiling. Every question you miss automatically becomes a flashcard in your FSRS queue. Progress saves automatically mid-test so a closed tab never costs you your work.
- 98 questions, timed to real SAT format
- Adaptive Module 2 difficulty
- Missed questions become flashcards
- Progress auto-saves mid-test
AI-Powered Focus Plan
A personalised weekly study roadmap.
The Focus Plan analyses your weakest chapters using your FSRS memory data and produces a step-by-step study roadmap — which cards to prioritise, how many sessions to hit 85% retention, and cross-chapter insights. It refreshes weekly and is cached so it loads instantly on repeat views. No guessing what to study next.
- Identifies your weakest chapters
- Step-by-step session targets
- Cross-chapter retention insights
- Refreshes weekly, loads instantly
Quick Review on the Dashboard
2 minutes. Due cards. Right from home.
Quick Review lets you flip through due cards without navigating anywhere. Batches of 5, designed to take about 2 minutes. Every rating goes through full FSRS scheduling — same as a regular session — and shows up in your stats. When you have 5 minutes between classes, Quick Review is the move.
- Flip cards without leaving the dashboard
- Batches of 5 — about 2 minutes
- Full FSRS scheduling per rating
- Shows up in activity heatmap and stats
Your Progress Is Always Safe
Close the tab. Come back. Pick up exactly where you left off.
Cue warns you before you navigate away from an active study session, SAT test, or live game — so an accidental click never costs you your work. SAT tests save progress continuously: if your browser crashes mid-test, a resume banner picks you up at the exact question with time remaining. Session state persists until you finish.
- Navigation guard on all active sessions
- SAT mid-test auto-save
- Resume banner on return
- Drafts kept for 48 hours
Community Decks
Share your decks. Find ones others made.
Publish any of your flashcard decks to the community library so other students can find and save them. Browse by subject — Biology, History, Cybersecurity, and more. Save any community deck to your account and start studying immediately with full FSRS scheduling. Decks are searchable and filterable.
- Publish decks to the community library
- Browse by subject with search
- Save to your account instantly
- Full FSRS scheduling on saved decks
10-Language Support
Study in the language that clicks for you.
Cue UI and flashcard content are available in English, Spanish, Chinese, Vietnamese, Arabic (RTL), Korean, Tagalog, French, German, and Portuguese. Card translations are cached in the database — you only pay the translation cost once.
- Full UI translation in 10 languages
- Arabic RTL layout support
- DB-cached card translations
- Switch languages anytime in settings
Built differently
Cue includes features that other study tools treat as premium — or don't offer at all.
| What Cue includes | Cue | Competitors |
|---|---|---|
| FSRS spaced repetition algorithm | ✓ | Rarely included |
| Personal AI tutor | ✓ | Not in core product |
| Live multiplayer study mode | ✓ | Premium feature |
| Math practice that never repeats | ✓ | Not in core product |
| Full-length SAT practice tests | ✓ | Paid product |
| AI-powered weekly Focus Plan | ✓ | Not in core product |
| Quick Review — 2-min dashboard sessions | ✓ | Not in core product |
| Reading passages with MC questions | ✓ | Not in core product |
| Community decks — share & discover | ✓ | Premium or missing |
| Session auto-save & navigation guard | ✓ | Not in core product |
| Teacher classroom tools | ✓ | Premium feature |
| 10-language UI + card translations | ✓ | Not in core product |
Feature availability and pricing on other platforms may vary by plan or product version. Last reviewed May 2026.
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