Hey r/sideprojects I wanted to share a win, and maybe help anyone else building for niche audiences. **The Problem:** I'm a Maths student at Cambridge where the unofficial expectation is working Monday-Saturday, 9-5. That's 45 hours/week just to keep up with supervisions and example sheets. I wanted my weekends back without falling behind. **The Solution:** Built "My Mathmo Planner" - a web app that helps you strategically frontload your work week. Instead of spreading work evenly across 6 days, it helps you plan smarter to compress everything into Mon-Fri. Already earned my first two Saturdays back using it! **First Week Results (this is the crazy part):** * LinkedIn post: 100+ likes, 20k+ views * 411 website visitors * 83 signups * Average session: 2+ minutes * Conversion rate: \~20% For context, this is SUPER niche - there's maybe 1,000 total maths students at Cambridge. So these numbers blew my mind. **What I think worked:** * Solved my own genuine problem (authenticity matters) * Posted where my exact audience hangs out (Cambridge LinkedIn is surprisingly active) * The tool actually delivers value immediately **Just shipped:** New feature for 3rd years to plan course selections and check for exam clashes. Turns out when people actually use your thing, feature ideas come naturally. **Tech stack:** Next.js, Supabase, Vercel (keeping it simple) **Link:** [my-mathmo-planner.co.uk](http://my-mathmo-planner.co.uk) Happy to answer questions about building for ultra-niche audiences, getting initial traction, or surviving Cambridge Maths! What's the most niche problem you've solved with a side project?