About · RunRiva
A small studio for deep quiz apps.
RunRiva makes trivia apps that take one subject seriously. Each app is devoted to a single topic worth knowing well — no clutter, no endless category menus, no nonsense. Just a clean, dignified game you can play every day.
Hi, I'm Maciej
RunRiva is a one-person studio in Poland — that's me. Since 1996 I've worked in and around the internet and digital products: as a product manager, on large portals and small fan sites, and in corporate transformations.
I've loved trivia games for years, and somewhere along the way I realised I enjoy hosting quizzes even more than playing them — for friends, at family gatherings, and in the corporate training sessions I run. RunRiva grew straight out of that.
More about me and what I write about is on maciejdzierzek.com · LinkedIn.
One subject, done properly
Most trivia apps spread themselves thin across hundreds of categories. I do the opposite: one app, one subject, calibrated across five difficulty levels — from trivial warm-ups to expert-level deep cuts. The result is a game that rewards genuine curiosity, not just guessing.
Questions you can trust
The questions are powered by QuizBase — a multilingual trivia engine I also built, drawing on 1.17M+ questions across 11 open datasets, each one carrying its own attribution under an open license (CC / public domain). Every question can be traced back to where it came from. A quiz is only as good as the facts behind it.
the engine behind RunRiva → Quizzes off the screen, too
These apps are for quizzing on your own, on your phone. But I enjoy hosting quizzes in person even more — so I built something for that too: RoundKit, ready-to-run pub quiz nights for hosts, teachers, and anyone gathering people around a table. Pick the topics and it assembles the whole evening — printable question sheets, answer cards, and a scoreboard — drawing on the same source-attributed QuizBase questions.
live pub quizzes, ready to host → Honest by default
Free to play, with an optional one-time purchase to remove ads. If you want to go further, Supporter Plus isn't a feature paywall — it's a way to back the studio directly. No fake reviews, no manufactured urgency, no dark patterns. I'd rather build something I'm proud to put my name on.
Become a Supporter
- Ad-free across every RunRiva app
- Your daily streak stays protected
- You directly back a one-person studio
Monthly or yearly, in the app. Cancel anytime in your store account.
A growing collection
U.S. Presidents was the debut. It's since been joined by Crime & Mystery and Sci-Fi & Fantasy, with more single-subject quiz apps on the way — same studio, same care, a different obsession each time. See all the apps →