A tiny indie studio of one. React Native apps & games shipped to the App Store — built by a React frontend dev who refuses to stop after work hours.
Card game for couples. One device, pass-and-reveal mechanic. 420 hand-written cards in Polish. Apple Privacy: Data Not Collected. No subscription, ever.
Open · mcat.one/nami →Pet a velvety cat as fast as you can. Race the world.
Open · mcat.one/purrtap →Co-parent shift planner. Coordinate the chaos, no spreadsheets.
Open · mcat.one/parentshift →A daily mood tracker that actually feels good to use.
Open · mcat.one/vibecheck →Hold yourself to your word. Tiny commitments, big momentum.
Open · mcat.one/promisekeeper →Social-deduction party game for 3–12 friends on one phone. Everyone sees the same word — except the Suspect. Drop clues, vote out the liar. Apple Privacy: Data Not Collected. No accounts. No subscription.
Open · mcat.one/podejrzani →mcat.one is run by Mateusz — a React frontend dev by day, indie iOS dev by night. Designing, coding, shipping and supporting every app on the catalog. No funding, no roadmap meetings. Just small, honest tools that feel good to open.
Bug reports, ideas, podcast invites or "I shipped something" notes — all welcome.
mateusz@mcat.one