Cerebo: Flashcards & Study

Cerebo is a powerful flashcard app for subjects that don't fit on a plain index card. Build rich cards with LaTeX math, code, tables, images, audio and PDFs, then use spaced repetition to remember them.

Write cards with real formatting — LaTeX math, syntax-highlighted code, tables, images, audio and PDFs — then let proven spaced repetition decide what you see and when.


BUILT FOR REAL SUBJECTS

Most flashcard apps give you two text boxes. Cerebo gives you a block editor: stack text, math, code, tables and media in any order, on the front and the back of a card.

• LaTeX math, rendered properly — inline and as display equations
• Function graphs — plot curves, or a 3D surface you can rotate with a finger
• Syntax-highlighted code blocks
• Markdown tables, headings, lists and quotes
• Images, audio recordings and PDF attachments
• Extract text from a photo or scanned page with OCR
• Cloze deletions — hide any part of a card and reveal it as you go
• Link related cards together and jump between them
• Read any card aloud, or translate it in place
• Generate a card's answer with Apple Intelligence — entirely on-device, on iPhones and iPads that support it


SPACED REPETITION THAT DOES THE WORK

Cerebo schedules each card with the SM-2 algorithm — the same approach behind decades of memory research. Cards you find easy move out to longer intervals. Cards you struggle with come back soon.

• A per-deck daily limit on new cards. Reviews are never capped, so nothing that's due is ever hidden from you
• Learning steps, lapse handling and adjustable ease
• Browse mode when you want to read through a deck instead of being tested
• A statistics view with a review heatmap, retention rate and a workload forecast for the days ahead


BRING YOUR EXISTING DECKS

• Import Anki .apkg and .colpkg files — cards, media, cloze, reverse cards and nested decks all come across
• Nested Anki decks become categories automatically
• Import an Anki package straight into an existing deck, or copy cards from one deck to another — duplicates are skipped
• Import and export CSV and JSON
• Export back out to .apkg any time — your cards are never locked in


EVERYWHERE YOU STUDY

• Apple Watch app for reviewing on your wrist
• Home Screen and Lock Screen widgets showing what's due
• Live Activity that tracks a study session in progress
• Siri and Shortcuts — "open my Pharmacology deck"
• Spotlight search finds individual cards
• Full keyboard, Dynamic Type and VoiceOver support


YOUR DATA STAYS YOURS

Cerebo collects nothing. There are no accounts, no analytics, no advertising and no tracking — the app makes no network calls of its own.

Everything works offline. iCloud sync — on by default when you're signed in, and one switch to turn off — moves your decks between your own devices through your private iCloud account, which only you can read.


FREE — NO ADS, NO SUBSCRIPTION

Cerebo is free. No subscription, no paywalled decks, no ads, and nothing to buy inside the app.


Questions or feedback: satwikdev12@gmail.com