Smart scheduling
Echo's FSRS-powered engine schedules each review based on your recall history — so you review less, but remember more.
SaltyYak Apps presents
Study smarter.
Remember longer.
Echo is a beautiful flashcard app built on proven spaced-repetition science. It learns how well you know each card and schedules reviews at exactly the right moment — so knowledge sticks.
- FSRS-powered scheduling
- Rich cards with audio & images
- 100% on-device — your data stays yours
Crafted by SaltyYak Apps
We build premium learning tools for people who take their goals seriously. Echo is our flagship — spaced repetition, refined.
Features
Everything you need to master any subject
From quick vocab drills to full exam prep — Echo adapts to how you learn.
Deadline planner
Set a target date and daily capacity. Echo works backward to pace new cards so you're exam-ready on time — without burnout.
Rich flashcards
Go beyond text. Add hints, a third side for extra context, images, audio clips, drawings, and tags — one card can live in multiple decks.
Test mode
Quiz yourself without affecting your study schedule. Perfect for a confidence check before the real thing.
Progress at a glance
Track recall rates, deck coverage, mastery phases, and study streaks. See exactly where you stand on every deck.
Badges & rewards
Stay motivated with streak badges, milestone rewards, and gentle reminders that keep your habit alive.
How it works
Three steps to lasting memory
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1
Build your decks
Create flashcards from scratch or import from Anki. Organize decks into groups, add colors and cover images, and tailor settings per deck.
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2
Study with confidence
Rate each card — Again, Hard, Good, or Easy. Echo records your answer and schedules the next review at the optimal interval for your memory.
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3
Watch mastery grow
Cards progress from New → Learning → Review → Mastered. Your dashboard shows recall trends so you always know you're on track.
Flexible by design
Two study modes. One powerful app.
Choose full control or let Echo plan your path to the finish line.
User-managed
You're in the driver's seat
Decide when to study, how many new cards to introduce, and how big each session should be. Echo handles review scheduling — you handle the pace.
- Full control over new card intake
- Ideal for open-ended learning
- No deadlines required
App-managed
Exam-ready on your deadline
Set a target date, retention goal, and daily capacity. Echo plans backward and introduces new cards each day so you finish on time.
- Automatic daily study plan
- Health gate protects against overload
- Catch-up sessions when you miss a day
Your data, your device
Private by default. No account required.
Echo stores everything locally on your phone. No sign-in, no cloud sync, no tracking your study habits across the internet. Open the app and start learning — that's it.
- All data stays on your device
- No account or login needed
- Study without being watched
Start remembering today
Download Echo free on your phone. Build your first deck in minutes.
Available for Android and iOS. Free to download.