Cogni vs StudyDeck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cogni
Create and study flashcards to master new materials efficiently. Utilize an enhanced spaced repetition algorithm to optimize study sessions for exams, languages, or complex subjects. Millions trust this method to achieve their learning goals.
- Create and review custom flashcards
- Spaced repetition algorithm
- Pre-made deck library
- AI-enhanced recall
- Progress tracking
- Offline access
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Cogni empowers you to master new materials effortlessly by creating and studying flashcards. Built on an enhanced spaced repetition algorithm, the app optimizes your study sessions, ensuring you get the most out of your learning. Whether preparing for exams, studying languages, or mastering complex subjects, millions trust flashcards to achieve their goals. Start your journey to mastery today—no limits, no boundaries, just learning! - Languages - Medicine (MCAT, USMLE & More) - Anatomy & Physiology - Exam preparation (SAT, GRE & More) - Math - Law - Geography - Computing - And many more! Key Benefits: - Easily create and review flashcards tailored to your learning needs. - Customize your cards with colors, lists, and more to fit your style. - Access a massive library of pre-made decks to jumpstart your learning. - Review lecture materials and prep for exams with powerful spaced repetition. Thousands of students boost their grades with this science-backed approach. - AI-enhanced spaced repetition (SRS) for optimal recall. - Flexible study interface with swipe and tap actions for efficient learning. - Detailed statistics and progress tracking to monitor your success. - Offline access to study with media-supported flashcards. Get started with Cogni today and take control of your learning journey! Terms of Use: https://www.notion.so/Terms-of-Use-122d703e827a81c89718d91448511266 Privacy Policy: https://www.notion.so/Privacy-Policy-122d703e827a81798c36cf1c20b44220
StudyDeck
Transform notes, PDFs, or photos into AI-powered flashcards instantly. Offers seven study modes, including spaced repetition and practice tests, to help you learn smarter and ace exams. On-device AI ensures your study materials remain private.
- AI-powered flashcard generation
- Import notes, PDFs, and photos
- Seven distinct study modes
- Spaced repetition (FSRS algorithm)
- On-device AI for privacy
- Progress tracking and analytics
- Share decks with classmates
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Turn any notes, PDFs, or photos into AI-powered flashcards in seconds. StudyDeck uses artificial intelligence to generate study cards automatically, so you spend less time creating and more time learning. SMART FLASHCARD CREATION - Paste text, import a PDF, or snap a photo - AI does the rest - Camera OCR scans handwritten or printed notes instantly - AI generates front/back cards, multiple choice questions, and true/false statements - Edit, customize, and organize cards into decks 7 STUDY MODES - Flashcards - classic swipe-to-study with flip animations - Multiple Choice - AI-generated answer options test real understanding - True/False - quick-fire statements to reinforce key facts - Written Response - type your answer and get AI-evaluated feedback - Audio Quiz - speak your answers and study hands-free on iPhone - Spaced Repetition - the FSRS algorithm schedules reviews at the optimal time - Practice Tests - timed mixed-format tests to simulate the real thing LEARN SMARTER WITH SPACED REPETITION StudyDeck uses FSRS v5, the most accurate spaced repetition algorithm available. It tracks what you know and what you don't, scheduling reviews right before you'd forget. No more wasting time on cards you've already mastered. AI THAT WORKS ON YOUR DEVICE StudyDeck uses Apple Intelligence for fast, private AI processing right on your iPhone. AI generation and speech recognition run on-device where supported, so your study materials stay private. BUILT FOR STUDENTS - Track your study progress with detailed analytics - See accuracy, mastered cards, and study streaks - Share decks with classmates - Dark mode and haptic feedback throughout - No ads FREE TO START Study with all 7 modes for free - up to 3 decks and 100 flashcards. Free accounts also include limited AI generation and import credits each month. Upgrade to Premium for unlimited access to everything. StudyDeck Premium: - Annual subscription with 7-day free trial - Lifetime access - one-time purchase - Unlimited decks and flashcards - Unlimited AI card generation - Unlimited PDF and photo imports - Unlimited practice tests and study guides - Free version: 3 decks, 100 flashcards, 5 AI generations, 5 PDF imports, 5 photo imports, 3 practice tests, and 3 study guides per month Privacy: StudyDeck processes everything on your device. On-device AI means your notes stay private. See our privacy policy for details. Privacy Policy: https://studydeck.net/privacy.html Terms of Use: https://studydeck.net/terms.html Questions? Visit our support page at https://studydeck.net/support.html
Screenshots
Verdict
The clearest difference is review sentiment: StudyDeck at 100% against Cogni's 35%. Cogni's advantage is iOS requirement (16.4 vs 26.0). On price, update cadence, ads and in-app purchases 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
Both are free to download. Cogni sells 9 in-app purchases, starting at $4.99 per month and StudyDeck sells 2 in-app purchases, starting at $12.99 per year. Whichever you choose, the download price is not the number that matters.
Cogni ships an update fortnightly, StudyDeck every 2 weeks. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.
| Parameter | Cogni | StudyDeck |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.7K ratings) — better | — |
| Positive reviews | 34.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.7K — better | — |
| Update frequency | Fortnightly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 62 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | COGNIFLY LTD | Frederic Bacro |
Customer experience
Cogni
StudyDeck
Bugs and 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
StudyDeck
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cogni
- Premium Monthly$4.991 Month
- Premium Monthly$7.991 Month
- Premium Monthly$14.991 Month
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- Premium Annual$19.991 Year
- Premium Annual$24.991 Year
- Premium Annual3 Days trial$29.991 Year
- Premium Annual$49.991 Year
- Lifetime Premium$49.99
- Premium Lifetime$99.99
StudyDeck
- StudyDeck Premium Annual7 Days trial$12.991 Year
- Lifetime Pass$39.99








