Retenio Summary
Retenio is a free, with in-app purchases iOS app in Education by BURAK KARTAL. Released in Apr 2026 (3 months ago). Store last updated Apr 25, 2026
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App Description
Retenio is the smart flashcard app that helps you learn and retain knowledge permanently using the science-backed FSRS spaced repetition algorithm.
KEY FEATURES:
- Smart Spaced Repetition (FSRS-4.5): Schedules reviews at exactly the right time.
- Rich Flashcards: Add text, images, and audio recordings to cards.
- Unlimited Decks and Cards (Pro)
- CSV Import and Export
- Detailed Statistics: 35-day heatmap, maturity distribution, streak counter.
- Home and Lock Screen Widgets
- 4 Languages: English, Turkish, Spanish, German.
- Beautiful Themes: Midnight dark mode and Parchment light mode.
- Daily Reminders
RETENIO PRO INCLUDES:
- Unlimited decks and cards
- Image cards
- Audio recording on cards
- Advanced statistics
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/