Math Says Yes
Statistics that sound wrong — until you see why.
Your friends have more friends than you, on average. It sounds like an insult, but it's the friendship paradox and the math checks out. I've been collecting facts like that for years. At some point the collection started to look like a product, so I built it.
Math Says Yes is a feed of cards, one surprising statistics or probability fact per card. Most cards ask for your guess before showing what's really going on, and many have a small interactive demo where you drag a slider and watch the numbers prove you wrong. There's also a daily challenge, five questions that test your gut against the odds.
Part of why I built it: I doomscroll like everybody else. I don't believe I can quit the habit, so I tried to make a version of it where you end up knowing something afterwards. Whether that actually changes anyone's screen time, no idea yet.
I've been working on it for around 4 months. One Expo/React Native codebase ships to native and web. Content lives in Sanity. Accounts and progress sync run on Supabase, and the web build deploys through Cloudflare Workers.
Where it stands: the Android app is live on Google Play and the web version is up at https://mathsaysyes.com. Apple still has the iOS build in review. Everything is readable without an account, sign-in exists only to sync progress and keep streaks. It's translated into Spanish and French as well.
Next is distribution. My plan is to push individual fact pages rather than the homepage, since a page about one weird paradox seems easier to link and share than "an education app". If you've launched something content-heavy: did promoting single pages work better for you than promoting the product itself?
1 Comment
The single-fact page strategy makes sense for a content-driven product since each idea has its own curiosity hook.
The interesting challenge is whether people return because of the facts themselves or because the product builds a learning habit through streaks and challenges.