Comparison

Deck vs Cogni

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

Head to head
About

Deck

Learn intuitively with a flashcard app that rebuilds remembering habits using a smart algorithm. Add text, equations, photos, GIFs, or sketches to cards and manage them with tags and reminders. Track progress and utilize practice or test modes.

Highlights
  • Add text, equations, photos, GIFs, sketches
  • Create and manage decks with tags
  • Intuitive suggestion-based learning
  • Progress tracking and test modes
  • Import decks from cloud services
  • iCloud sync across Apple devices
  • Dark mode and adjustable text size
Features
Read full description

"There's is always one more thing to learn why not start from a Deck" Deck is Flashcard based app which help you to learn in more intuitive way. It help to rebuild your remembering habits with its state of the art algorithm which carefully monitors your learning and provide situation based suggestion all these smart thing work inside the device, so you don't have to care for your privacy protection. KEY FEATURES : • Add Text, Mathematical Equation, Photos, GIFs, Sketch in a Flashcard. • Easy to create and manage Decks of Flashcard. • Create different color of cards. • Intuitive suggestion based learning. • Tags made easier to manage your Decks in more organized way. • Reminder never let you forget any deck. • Whole UI element support Dark more so your content appears better at night as well. • Modern UI with support for latest iOS and macOS devices. Native support for all Apple Devices. • Import Decks or Cards from Web, Google Drive, Dropbox Evernote, Box and more in CSV format. • Multi-window lets you open multiple Decks at once . • iCloud Sync makes using Deck across Mac and iOS devices seamless and easy. • Discover this section to know your progress at each and every step this includes progress of adding card, test scores, forget rate and test appeared. It also includes each and every details of the test. • Discover two new test mode include the Practice mode and Test mode. • Widgets support for iOS, iPadOS and macOS. • Increase the size of text when inside learning mode. You may purchase an auto-renewing subscription through an In-App Purchase. • Auto-renewable subscription • 3 month ($1.99), 1 year ($6.49) for Family and One time buy option ($24.99). • Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase • Privacy policy and terms of use: https://haarisiqubal.github.io/app/privacy • Terms of use : https://haarisiqubal.github.io/app/terms

About

Cogni

This app uses AI to generate flashcards from various sources like PDFs, notes, and lecture recordings. It employs spaced repetition with the FSRS algorithm to optimize memorization and allows for Anki deck import. Study notes can be generated alongside cards, and a library of pre-made decks is available.

Highlights
  • AI flashcard generation
  • FSRS spaced repetition
  • Anki deck import
  • Integrated study notes
  • Offline study mode
  • Library of pre-made decks
Read full description

Cogni is a flashcard app with FSRS spaced repetition, AI flashcard generation and Anki deck import. Study on iPhone, iPad, Android and the web: your decks and progress sync through one account, and reviews work offline. MAKE FLASHCARDS WITH AI Upload a PDF, photograph your notes or textbook pages, upload a lecture recording, paste text or type a topic. Cogni drafts question-and-answer and cloze cards. You check the drafts and keep the ones you want. FSRS SPACED REPETITION Every card is scheduled with FSRS, the open-source algorithm that predicts when you are about to forget. After each answer, rate your recall (Again, Hard, Good or Easy) and see when the card comes back. Each day you review only what is due. IMPORT YOUR ANKI DECKS Save an .apkg file in Files, tap + in Cogni and choose “Import .apkg”. Cards, subdecks, cloze cards, images and audio come with it. Anki's review history stays in Anki: FSRS builds a new schedule from your answers in Cogni. NOTES NEXT TO YOUR CARDS Generate study notes together with your cards and read them in Cogni on the web, linked to the cards they produced. READY-MADE DECKS Browse a library of 5,000+ decks for languages, medicine, anatomy and more, add a deck and start studying. BUILT FOR - Medical, nursing and pre-med students - Language learners building vocabulary - Students preparing for exams - Anyone moving their decks from another flashcard app FREE TO START Create cards, import decks, sync and study up to 40 card reviews a day for free, and try one AI generation. Cogni Premium removes the daily review limit, adds text-to-speech and includes AI generation within your plan's allowance. Terms of Use: https://cogni.cards/terms/ Privacy Policy: https://cogni.cards/privacy/

Screenshots

Deck4 screens
Cogni4 screens

Verdict

The call

The clearest difference is review sentiment: Deck at 100% against Cogni's 36%. Cogni's advantage is rating (4.7 vs 4.0) and update cadence (weekly vs every 3 months). On price, ads, in-app purchases and monetization model 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. Deck sells 3 in-app purchases, starting at $1.99 per 3 months and Cogni sells 9 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Cogni holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Cogni has 1.7K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 100% of Deck's written reviews are positive against 36% of Cogni's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Deck ships an update every 3 months, Cogni weekly. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 6 level
Deck versus Cogni: the parameters behind the verdict, then further details
ParameterDeckCogni
PriceFreeFree
Rating4.0 (4 ratings)4.7 (1.7K ratings) — better
Positive reviews100.0% of reviews — better35.8% of reviews
Number of ratings41.7K — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.0 — better16.4
Further details — not scored
Size28 MB76 MB
Age rating4+4+
DeveloperHaaris IqubalCOGNIFLY LTD

Customer experience

Deck

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cogni

All ratings1,690 ratings
Positive92.8%
Neutral2.7%
Negative4.4%
Written reviews201 reviews
Positive35.8%
Neutral17.4%
Negative46.8%

Bugs and requests

Deck

Not enough reviews yet to summarise bugs or requests.

Cogni

Reported bugs

2 issues
  • App no longer available after paying for annual subscription
  • Occasional crashes

Requested features

4 requests
  • Integrate ChatGPT or Claude for automatic card creation
  • Add sub-decks for larger decks that need more review
  • Improve algorithm for hard/again ratings to better target struggling cards
  • Add subsections for decks to study different sections separately

In-app purchases

3 purchases

Deck

Subscriptions2
  • Subscribe - 3 Month Family7 Days trial$1.993 Months
  • Subscribe - Yearly Family$6.491 Year
One-time1
  • Buy - Lifetime$24.99
9 purchases

Cogni

Subscriptions7
  • Premium Monthly$4.991 Month
  • Premium Monthly$7.991 Month
  • Premium Monthly$14.991 Month
Show 4 more
  • Premium Annual$19.991 Year
  • Premium Annual$24.991 Year
  • Premium Annual$29.991 Year
  • Premium Annual$49.991 Year
One-time2
  • Lifetime Premium$69.99
  • Premium Lifetime$99.99

Questions

Is Deck free?
Deck is free to download, with in-app purchases available.
Is Cogni free?
Cogni is free to download, with in-app purchases available.
Which has better reviews, Deck or Cogni?
Cogni is rated higher. Deck averages 4.0 out of 5 from 4 ratings, while Cogni averages 4.7 from 1.7K ratings.
Do Deck or Cogni have ads?
Neither Deck nor Cogni shows ads.
Which is updated more often, Deck or Cogni?
Deck ships an update every 3 months, and Cogni weekly. Most recently, Deck was updated on November 7, 2026 and Cogni on November 8, 2026.

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