Crime & Mystery
Crime & Mystery Trivia
Every mystery and motive, one swipe at a time.
Explore Crime & Mystery Trivia
Animated preview: a round of Crime & Mystery Trivia answering three real questions.
A quiz studio · by RunRiva
Beautifully made trivia,
one obsession at a time.
We build deep, single-subject quiz apps for iPhone and Android — each one focused on a topic worth knowing well. Source-attributed questions, a daily challenge, friends and leaderboards, and an ad-free option. No clutter, no nonsense.
Browse the appsThe grand tour
Every app is its own world.
Same care, different obsession — see them in motion.
Our apps
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Each app is its own world — same care, different obsession.
The studio
Made by one person, with care
RunRiva is an independent studio. Every question is drawn from open, source-attributed knowledge — and every app is built to be played every day, not to chase your attention.
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