Comparison

Cerebo vs JustFlip

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Cerebo

Create rich flashcards with text, math, code, images, and audio. Utilize spaced repetition for effective memorization. Import existing decks and study across all your Apple devices, including Apple Watch.

Highlights
  • Rich card editor with text, math, code, images, audio, PDFs
  • Spaced repetition algorithm (SM-2)
  • Import Anki decks (.apkg, .colpkg)
  • Offline functionality and iCloud sync
  • Apple Watch app and widgets
  • OCR for text extraction from images
  • Apple Intelligence for answer generation
Features
Read full description

Cerebo is a flashcard maker for subjects that don't fit on a plain index card. Build rich cards with LaTeX math, code, tables, graphs, images, audio and PDFs, then let 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 or as display equations • Function graphs: plot curves, or a 3D surface you can rotate with a finger • Syntax-highlighted code, Markdown tables, headings and lists • 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, read any card aloud, or translate it in place TEST YOURSELF Every deck has a Test button, and tests never change your review schedule. • Match: pair each front with its back against the clock, on any iPhone or iPad • Practice Test, with Apple Intelligence: true or false, multiple choice and written questions. Written answers are checked for meaning • Print a deck or export it as a PDF to study on paper MAKE CARDS, ASK AND QUIZ WITH APPLE INTELLIGENCE On iPhones and iPads that support Apple Intelligence, Cerebo has a chat that runs entirely on your device: • Turn a PDF, Word document, photo, scan or web page into a deck, or record a lecture and make cards from the transcript • Make a study guide from the same document: an overview, the main points and key terms • Pictures come along: a PDF's figures appear on the cards about them, and on iOS 27 Apple Intelligence reads photos, handwriting and diagrams • Graphs, tables, equations and code are added where they help, and you review every card first • Ask questions about your own cards, and see which cards the answer came from • Get quizzed on a deck or a topic: answer in your own words, typed or out loud, and choose the rating yourself • Generate a card's answer, or fill in your own answer template (meaning, synonyms, example) • Share a page from Safari with "Make Cards in Cerebo" SPACED REPETITION THAT DOES THE WORK Cerebo schedules each card with the SM-2 algorithm. 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 • Browse mode to read through a deck without being tested • Statistics with a review heatmap, retention rate and a forecast for the days ahead BRING YOUR EXISTING DECKS • Import Anki .apkg and .colpkg files with media, cloze, reverse cards and nested decks • Paste a Quizlet export to bring a set across • Import into an existing deck, or copy cards between decks. Duplicates are skipped • Import and export CSV and JSON, and export back to .apkg any time EVERYWHERE YOU STUDY • Apple Watch app for reviewing on your wrist • Scan to Cards and Record a Lecture in Control Center, on the Lock Screen or the Action button, and a Quick Capture widget • Home Screen and Lock Screen widgets showing what's due, and a Live Activity while you study • A library sidebar on iPad and iPhone Duo • Siri and Shortcuts, daily reminders, and study sessions added to your calendar • Full keyboard, Dynamic Type and VoiceOver support • In English, Spanish, French, German, Italian, Portuguese, Japanese, Korean and Chinese YOUR DATA STAYS YOURS Cerebo collects nothing: no accounts, no analytics, no advertising and no tracking, and the app makes no network calls of its own. The chat runs on your device, so what you write, attach or record is never sent to a server. Everything works offline. iCloud sync moves your decks between your own devices through your private iCloud account, and one switch turns it off. FREE: NO ADS, NO SUBSCRIPTION Cerebo is free. No subscription, no ads, and nothing to buy inside the app. Questions or feedback: satwikdev12@gmail.com

About

JustFlip

Create and study flashcards using a spaced-repetition system. Supports various card types, including text, images, and code, with offline functionality and iCloud sync. Offers AI integration for prompt generation and an optional Pro subscription for advanced features.

Highlights
  • Spaced repetition scheduling (SM-2, FSRS)
  • Multiple card types (cloze, typed, Markdown, LaTeX, code, images)
  • AI prompt generation and card import
  • Offline functionality and iCloud sync
  • Anki and CSV import/export
  • Accessibility features (VoiceOver, Reduced Motion)
Features
Read full description

Flashcards with a real spaced-repetition engine — and no ads, no sign-up, and no paywall creep. Native on iPhone, iPad, Mac and Apple Watch. iCloud sync included free. Full Anki and CSV import and export, so your cards stay yours. SCHEDULING YOU CAN SEE • Proven SM-2 scheduling, with FSRS available as an optional smart schedule — fewer reviews at the same retention. • Every grade button shows the interval it will produce before you choose it. • Review priority per interest and per deck, so limited study time goes where it matters. • Postpone a card, deck or interest without lying to the algorithm. Holds are stored separately and never touch your memory data. • Leech detection suggests retiring cards you keep failing. CARDS FOR ANY SUBJECT • Cloze deletion (fill in the blank), using Anki-compatible syntax. • Typed answers, with an automatic correct / close / incorrect verdict. • Markdown, LaTeX maths, syntax-highlighted code and tables. • Images with descriptions, read out by VoiceOver. • Tags that cut across decks, plus search over every card you own. BRING YOUR OWN AI JustFlip writes the prompt for whichever chat AI you already use, then imports the answer straight back as cards. No daily caps, no extra subscription, and you review every card before it enters a deck. BUILT FOR APPLE PLATFORMS • Home-screen widget with your due count. • Siri and Shortcuts: ask how many cards are due, or start a review. • Spotlight finds your cards from the Home Screen, matched on either side. • Apple Watch review on your wrist. • Cards read aloud, with per-card language and pronunciation control. YOUR DATA, VISIBLE AND PORTABLE • Works fully offline. No JustFlip account, ever. • iCloud sync shows its last successful sync, with a troubleshooting screen when something looks wrong. • One-file backup, and statistics export as CSV or JSON. ACCESSIBILITY VoiceOver labels throughout, Reduced Motion support, and non-colour indicators when Differentiate Without Color is turned on. FREE AND PRO Free covers up to 3 interests with 5 decks each, with the full scheduler and no ads. JustFlip Pro lifts those limits and adds listening and advanced statistics, as a monthly or yearly subscription or a one-time lifetime purchase. A one-time 7-day trial unlocks the Pro features so you can try them first. This app uses Apple's Standard End User License Agreement (EULA): https://www.apple.com/legal/internal/itunes/appstore/dev/stdeula/ Privacy policy: https://just-flip.app/privacy.html Terms of use: https://just-flip.app/terms.html

Screenshots

Cerebo4 screens
JustFlip4 screens

Verdict

The call

The clearest difference is in-app purchases: Cerebo at none against JustFlip's 3. Cerebo also leads on ratings volume (6 vs 1). JustFlip's advantage is update cadence (every 6 days vs every 2 weeks). On price, rating, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. JustFlip sells 3 in-app purchases, starting at $1.99 per month. Cerebo asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Cerebo against 5.0 for JustFlip. That said, the two scores are not equally well evidenced: Cerebo has 6 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Cerebo ships an update every 2 weeks, JustFlip every 6 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
Cerebo versus JustFlip: the parameters behind the verdict, then further details
ParameterCereboJustFlip
PriceFreeFree
Rating5.0 (6 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings6 — better1
Update frequencyEvery 2 weeksEvery 6 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac, Apple Watch — better
Requires iOS18.017.0 — better
Further details — not scored
Size12 MB146 MB
Age rating4+4+
DeveloperPatnuru Satwik PatroDANIEL CECH

Customer experience

Cerebo

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

JustFlip

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Cerebo

No in-app purchases

3 purchases

JustFlip

Subscriptions2
  • JustFlip Pro Monthly$1.991 Month
  • JustFlip Pro Yearly$5.991 Year
One-time1
  • JustFlip Pro Lifetime$12.99

Questions

Is Cerebo free?
Cerebo is free to download, with no in-app purchases.
Is JustFlip free?
JustFlip is free to download, with in-app purchases available.
Which has better reviews, Cerebo or JustFlip?
Cerebo and JustFlip are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.
Do Cerebo or JustFlip have ads?
Neither Cerebo nor JustFlip shows ads.
Which is updated more often, Cerebo or JustFlip?
Cerebo ships an update every 2 weeks, and JustFlip every 6 days. Most recently, Cerebo was updated on October 24, 2026 and JustFlip on October 25, 2026.

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