Built for daily consistency and fast recall
A premium workspace for your coding questions, solutions, and revision.
Save problems, store clean solutions, track revision schedules, and measure progress with dashboards that keep your practice moving forward.
Smart search
Find any solution in seconds.
Revision flow
Never forget important patterns.
Secure auth
Sessions, CSRF, hashed passwords.
Dashboard preview
Total Questions
128
All saved problems
Streak
14
Days active
Today’s Focus
Upcoming revisions and favorites
Open
Two Sum
Arrays • Hash map
Binary Search
Search • Patterns
Due
Features
Everything you need to stay sharp
Designed to feel fast, premium, and purpose-built for interviews and long-term retention.
Instant search & filters
Search by title, tags, platform, language, favorites, and dates with a compact filter dialog.
Clean solution storage
Save problem statements, code, outputs, and explanation for future-you in one place.
Revision tracker
Schedule next reviews, track priorities, and build a consistent revision habit.
Insightful dashboard
See trends for added vs solved, activity streaks, language mix, platforms, and more.
Favorites
Pin the questions that matter most and come back to them instantly.
Secure by default
Password hashing, CSRF protection, remember-me sessions, and email verification.
Use cases
Built for real workflows
Different goals, same system: capture, revisit, and improve with measurable momentum.
Interview preparation
Store your best solutions and revisit patterns on a schedule so you don’t relearn from scratch.
Spaced repetition
Favorites
Dashboards
Learning & mastery
Turn random practice into a knowledge base: concise explanations, outputs, and tags you can trust.
Explanations
Tags
Search
Mentorship & tracking
Track what’s pending, what’s solved, and what needs revision — perfect for coaching or self-review.
Status
Revision priorities
Activity logs
For competitive programming
Tag by technique, keep a clean archive of tricky problems, and quickly refresh before contests.
For day-to-day engineering
Save reusable snippets and patterns (two pointers, BFS, DP templates) you can apply at work.
How it works
A simple loop that compounds
Capture
Save the problem statement, your solution, and a clear explanation.
Prioritize
Favorite key patterns and schedule revisions for spaced repetition.
Measure
Use dashboards to stay accountable and spot gaps early.
Built for speed
A clean UI, compact controls, and a workflow that stays out of your way.
Feels premium
Modern typography, consistent components, and a polished experience across pages.
Own your data
Export your library anytime from Settings.
Testimonials
What builders say after using it
Ten real-world style notes on what improved and how the workflow helped.
“My recall improved fast.”
The revision schedule kept me honest. I stopped re-solving the same basics and started nailing patterns on sight.
SDE candidate · Interview prep
“Search + tags is a superpower.”
I can find any solution in seconds by technique. It feels like my personal algorithm wiki.
Backend engineer · Knowledge base
“Finally consistent.”
The dashboard made my streak visible, and that small feedback loop made practice automatic.
Student · Daily practice
“Better explanations, better interviews.”
Writing a short explanation next to the code forced clarity. I could communicate tradeoffs more confidently.
Full-stack dev · Communication
“Favorites became my shortlist.”
I starred patterns that unlock multiple problems. Reviewing that list the week before interviews was perfect.
Mobile dev · Focus
“Less clutter, more signal.”
The UI is clean. I don’t lose time navigating — I just add, tag, and move on.
Frontend dev · Workflow
“Revision priorities are gold.”
I mark hard problems as High priority and the app keeps surfacing them until they’re mastered.
Data engineer · Mastery
“My prep became measurable.”
Added vs solved trends showed if I was avoiding hard work. That visibility changed my behavior.
Graduate · Progress tracking
“Great for coaching.”
My mentees can keep their library structured. Reviewing their explanations makes feedback faster.
Mentor · Review
“It replaced my messy docs.”
I used to scatter notes across files. Now every problem has the statement, code, output, and explanation in one place.
Systems engineer · Organization
Start building momentum
Turn practice into a system.
Create your account, verify email, and start saving solutions you’ll actually revisit.
FAQ
Answers, upfront
Clear details so it feels trustworthy and professional.
Is this secure?
Passwords are hashed, requests are protected by CSRF tokens, and sessions follow secure defaults. Email verification and password reset are supported via SMTP.
Can I run it locally?
Yes. It works well on WAMP/LAMP stacks and can be deployed to any PHP + MySQL hosting.
Does it support revision tracking?
Yes. Schedule revisions, set priorities, and monitor upcoming/overdue items with charts and lists.
How does revision scheduling work?
You can set a priority and a next revision date per question. The revision view and dashboard highlight what’s due and what’s overdue so you always know what to review next.
Can I store explanations and outputs along with code?
Yes. Each question can include a problem statement, solution code, output, and a written explanation—so you can understand and communicate the approach later.
Does it support multiple platforms and languages?
Yes. Track platform (LeetCode, HackerRank, Codeforces, etc.) and your solution language, then filter and analyze your mix on the dashboard.
How do favorites help?
Favorites are your high-leverage list. Star the problems that teach reusable patterns, then filter to favorites when you need a fast review set.
Can I export my data?
Yes. Use Settings to export your library as JSON (questions, tags, solutions, revision info, and favorites) for backup or migration.
What happens if email can’t be delivered?
If SMTP isn’t available or delivery fails, the app shows a verification link on-screen so you can still verify and continue.