Smarter flashcards. Lasting memory.
Retenio is a beautifully crafted iOS app that uses spaced repetition to help you learn languages, ace exams, and remember what matters — one card at a time.
Everything you need to learn deeply.
Spaced Repetition
A proven algorithm schedules every card at the perfect moment, so knowledge actually sticks.
Beautiful Decks
Organize cards into colorful decks with icons and themes that make studying feel inviting.
Daily Streaks
Build a learning habit. Streak protection keeps your momentum alive even on busy days.
Insightful Stats
Track retention, weekly progress, and total reviews with elegant, easy-to-read charts.
iCloud Sync
Your decks follow you everywhere — privately synced across all your Apple devices.
Themes & Accents
Pick a mood: Midnight, Parchment, Abyss and more. Personalize the accent color too.
Watch your knowledge grow.
See your current streak, retention rate, and total reviews at a glance. Weekly charts reveal exactly when you study best — so you can build a rhythm that works for you.
- ▸ Real-time retention tracking
- ▸ Weekly review breakdown
- ▸ Card status overview (new, learning, mastered)
Made to feel like yours.
Choose from carefully crafted themes — Midnight, Parchment, Abyss and more — and pair them with one of eight accent colors. Tune notifications, sound, and haptics until the app feels just right.
Speaks your language.
Retenio is fully localized in four languages, with more on the way.
Start remembering today.
Download Retenio on the App Store and turn your free minutes into lasting knowledge.
Download on App Store