Retenio
Flashcards & Spaced Repetition
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Retenio is the smart flashcard app that helps you learn and keep knowledge for good, using the science-backed FSRS spaced repetition algorithm.
KEY FEATURES:
- Smart Spaced Repetition (FSRS-6): every card comes back right before you would forget it.
- Focused study screen: a large card, remaining counts, the next review time under every rating, and undo.
- Rich flashcards: text, images, audio recordings and fill-in-the-blank (cloze) cards.
- Study both directions and have cards read aloud.
- Statistics from your real study history: streaks, weekly chart, heatmap, card maturity.
- Home Screen and Lock Screen widgets.
- CSV import and export.
- 4 languages: English, Turkish, Spanish, German.
- Themes and daily reminders.
RETENIO PRO INCLUDES:
- Unlimited decks and cards
- Image cards and audio recordings
- iCloud sync across your devices
- Text from photos: scan notes and book pages
- AI cards from your notes, created on your device (on devices that support Apple Intelligence)
- Study right from a Home Screen widget
Start for free. Upgrade to Pro when you are ready.
Retenio Pro Lifetime: $49.99 (one-time purchase)
Retenio Pro Annual: $14.99/year
Retenio Pro Monthly: $1.99/month
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Retenio 1.1 is a big update.
• Spaced repetition fixed: cards now come back at real intervals (FSRS-6). In the previous version most cards were repeated every day.
• New study screen: a large card, remaining counts, a Show Answer button and the next review time under every rating.
• Undo: fix a mistaken rating with one tap.
• Review All now studies due cards from every deck.
• Study both directions, fill-in-the-blank (cloze) cards and read-aloud.
• Pro: iCloud sync, a Home Screen study widget, text from photos and AI cards from your notes, created on your device.
• Streaks and statistics now come from your real study history.
• iOS 26 design and support for wider screens.
The developer, BURAK KARTAL, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- BURAK KARTAL
- Size
- 9 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 3 more
- English, German, Spanish, Turkish
- Age Rating
4+
- 4+
- Contains
User-Generated Content
- In-App Purchases
Yes
- Retenio Pro Lifetime $49.99
- Retenio Pro Annual $14.99
- Retenio Pro Monthly $1.99
- Copyright
- © 2026 Burak Kartal