I've solved 400+ LeetCode problems, but I've noticed something frustrating: I can often recognize that I've solved a problem before, yet I struggle to recall the key insight or pattern that made the solution work.

It feels like many of us spend hundreds of hours solving problems, but we don't have a good system for retaining what we've learned long-term.

I'm thinking about building a tool that:

• Imports solved LeetCode problems Daily.
• Creates a very short summary of the core idea/pattern for each problem and all solutions.
• Sends daily WhatsApp revisions of previously solved problems (user defined time).
• Uses spaced repetition (shows forgotten problems more often) - while sending revision message also asks Remember it ? [Easy, Somewhat, Forgot] and accordingly sends the revision for the Forgot and Somewhat problems and their topics.
• In future this tool can identify the week topics of the user, and can suggest topics and problems to improve.

The goal isn't to solve more problems, it's to remember the ones you've already solved.

For those who have solved 100+ problems:

1. Do you struggle with forgetting patterns/approaches after a few months?
2. How do you currently revise old problems?
3. Would daily 30-second WhatsApp revisions be useful, or would they become noise?
4. What would make a tool like this genuinely valuable to you?

I'm trying to understand whether this is a real problem worth solving or just something I've personally experienced.