You don't forget interviews. You forget the patterns.
We resurface each weak DSA pattern right before the forgetting curve takes it — so your practice still holds on interview day.
No credit card required.
The Problem with Traditional Practice
Without a system, you forget 80% of what you learn within a week. Random problem selection leaves weak patterns untouched.
Based on Ebbinghaus's forgetting curve research (1885)
Built on 40 Years of Cognitive Science
Four proven learning principles, applied to your interview prep.
Spacing Effect
Distributed practice beats cramming. Our algorithm spaces your reviews for optimal long-term retention.
Cepeda et al., 2006 — Psychological Bulletin
Testing Effect
Active recall strengthens memory more than passive review. Every practice session is a retrieval opportunity.
Roediger & Karpicke, 2006 — Psychological Science
Interleaving
Mixing different patterns daily improves transfer to new problems. We intelligently vary your practice.
Rohrer & Taylor, 2007 — Instructional Science
Forgetting Curve
Review at 70-80% retention for maximum efficiency. Our algorithm knows exactly when you're about to forget.
Ebbinghaus, 1885 — Memory: A Contribution to Experimental Psychology
Scientific References
Spacing Effect
Cepeda, N.J., et al. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354-380.
Testing Effect
Roediger, H.L., & Karpicke, J.D. (2006). Test-enhanced learning. Psychological Science, 17(3), 249-255.
Interleaving
Rohrer, D., & Taylor, K. (2007). The shuffling of mathematics problems improves learning. Instructional Science, 35(6), 481-498.
Forgetting Curve
Ebbinghaus, H. (1885). Memory: A Contribution to Experimental Psychology. Teachers College, Columbia University.
Sleep Consolidation
Walker, M.P. (2017). Why We Sleep: Unlocking the Power of Sleep and Dreams. Scribner.
SM-2 Algorithm
Wozniak, P.A., & Gorzelanczyk, E.J. (1994). Optimization of repetition spacing in the practice of learning. Acta Neurobiologiae Experimentalis, 54, 59-62.