Learn once.
Remember forever.
RecallOn uses the scientifically proven 1-4-7-21 spaced repetition method to help you actually retain what you learn — for DSA, System Design, interview prep, and beyond.
Built for every learner
Perfect for technical interviews, certifications, and lifelong learning.
Track algorithms, patterns, and problem-solving techniques for interviews.
Retain distributed systems concepts, trade-offs, and design patterns.
Behavioral frameworks, company-specific topics, and role knowledge.
Cloud, DevOps, finance — any structured learning with lots of topics.
Perfect for MBBS students and doctors preparing for MLE or specialized medical boards.
Master vast syllabuses for hyper-competitive entrance exams by retaining formulas and concepts.
Track algorithms, patterns, and problem-solving techniques for interviews.
Retain distributed systems concepts, trade-offs, and design patterns.
Behavioral frameworks, company-specific topics, and role knowledge.
Cloud, DevOps, finance — any structured learning with lots of topics.
Perfect for MBBS students and doctors preparing for MLE or specialized medical boards.
Master vast syllabuses for hyper-competitive entrance exams by retaining formulas and concepts.
Track algorithms, patterns, and problem-solving techniques for interviews.
Retain distributed systems concepts, trade-offs, and design patterns.
Behavioral frameworks, company-specific topics, and role knowledge.
Cloud, DevOps, finance — any structured learning with lots of topics.
Perfect for MBBS students and doctors preparing for MLE or specialized medical boards.
Master vast syllabuses for hyper-competitive entrance exams by retaining formulas and concepts.
Track algorithms, patterns, and problem-solving techniques for interviews.
Retain distributed systems concepts, trade-offs, and design patterns.
Behavioral frameworks, company-specific topics, and role knowledge.
Cloud, DevOps, finance — any structured learning with lots of topics.
Perfect for MBBS students and doctors preparing for MLE or specialized medical boards.
Master vast syllabuses for hyper-competitive entrance exams by retaining formulas and concepts.
Supercharge your memory wiring
Everything you need to master complex exams (MBBS, MCAT, JEE), technical interviews, and professional certifications.
1-4-7-21 Day Scheduler
Our algorithm calculates review intervals automatically. Study once, and RecallOn queues revisions on days 1, 4, 7, and 21 to interrupt your forgetting curve.
Build Your Neuron Wiring
Repetition builds myelin, the sheath wrapping your brain's neurons. Every spaced review thickens this wiring, making your recall faster and your memory permanent.
Immersive Focus Mode
Step into a distraction-free screen designed for pure focus. Review your flashcard decks, check off topics, and see active notes without any sidebar clutter.
Visual Kanban Boards
Drag, drop, and organize your syllabus. Categorize topics into "Inbox", "Reviewing", and "Mastered" to see exactly what needs your attention at a glance.
Review Calendar View
See your revision load across days and weeks. Plan your study sessions and prepare for big exams with a clean visual schedule of upcoming reviews.
Streak & Progress Stats
Monitor check-in history, active daily streaks, and topic-by-topic retention indexes to stay motivated and track your long-term memory growth.
The 1-4-7-21 System
Based on Ebbinghaus's Forgetting Curve — review at exactly the right intervals to move knowledge into long-term memory.
Day 1: First Review
Day 1: First Review
Review on the same day you learn. Retention is at its peak. This sets the foundation to build your neuron wiring with spaced repetition.
Day 4: Second Review
Day 4: Second Review
Before you forget. Reinforces neural pathways formed on Day 1. You start building structural memory.
Day 7: Third Review
Day 7: Third Review
One week in. The concept is solidifying in medium-term memory. It's getting harder to forget.
Day 21: Final Review
Day 21: Final Review
Three weeks later. After this, it's permanently lodged in your long-term memory.
Simple pricing
One plan. One price. Everything included.
Free
- Up to 10 topics
- 1-4-7-21 scheduling
- Dashboard & Queue
- Focus Mode
- Basic stats
Pro
- Unlimited topics
- Everything in Free
- Kanban board
- Calendar view
- Email reminders
- Advanced analytics