We make quiz things.

Quiz games for people who play. Printable quiz nights for people who host. And a trivia API for people who build.

Sci-Fi & Fantasy Books Trivia — Quiz Apps play

RoundKit answer card, ready to print — RoundKit host

RoundKit question sheet, ready to print — RoundKit host

GET /api/v1/questions?difficulty=hard

{
  "difficulty": "hard",
  "en": {
    "question": "Which treaty ended
                 the Thirty Years' War?",
    "correctAnswer": "Peace of Westphalia"
  },
  "source":     "opentriviaqa",
  "license":    "CC-BY-SA-4.0",
  "author":     "OpenTriviaQA"
}

QuizBase build

Specimen 01 - the obsessions

5 apps one obsession each

Not one app about everything. Separate, deep games about subjects worth knowing well - crime and mystery, video games, US presidents, science fiction, and one that is deliberately easy. Each has its own graphic world, a daily challenge, 44 awards to unlock and no clutter on screen.

See them on Google Play

Crime & Mystery Trivia
Hangover Quiz
U.S. Presidents Quiz
Pixel Quiz
Sci-Fi & Fantasy Book Trivia

Specimen 02 - the evening

5 min a full quiz night

Pick topics, rounds and difficulty. Get question sheets, answer cards and a host pack - print-ready, in three visual templates, with your own logo on them. Over a million questions underneath means only one thing: your regulars never get the same question twice. Building and previewing is free; a whole evening costs from 5.99 euro.

Build a quiz night

A printed RoundKit scoresheet on a pub table

Host pack - Ink & Ember — From the creator, print-ready - scroll through:

Answer card - Pop & Play — From the creator, print-ready - scroll through:

Specimen 03 - the engine

1.1M+ questions, maintained

Anyone can generate questions now. The hard part is keeping them alive - deduplicated, calibrated into five difficulty levels, attributed to their source, versioned, so they do not rot in six months. That is the whole job, served over an API, an SDK and an MCP server. Eleven open datasets, English and Polish, free tier with no card.

Read the docs

$ curl "quizbase.runriva.com\
/api/v1/demo/questions?lang=en"  # try it

{
  "text": "Who recorded the song "Total
           Eclipse of the Heart"?",
  "correctAnswer": "Bonnie Tyler",
  "difficulty": "easy",
  "attribution": {
    "source":  "nq-open",
    "license": "CC-BY-SA-3.0"
  }
}

Deduplicated
Versioned
Attributed

Specimen 04 - the room

up to 100 participants in one room

Games run live: players answer on their phones, the room watches the projector, the host holds the tempo. It works - for now I run only my own sessions on it, polishing the UX before anyone else gets the keys. Closed beta.

See how it works

RunRiva app projector screen from the demo game — Real projector screens from the demo game

Real projector screens from the demo game

Inventory

1,173,456 questions in care (snapshot: 26 May 2026)
24 categories, history to video games
5 apps live on Google Play
44 achievements to earn in every app

Made by one person, with care.

I have hosted quizzes for years - for friends, at gatherings and in the training sessions I run. Hosting is the fun part. Writing fresh, checked questions every week is the chore. These products came out of that chore.

Maciej Dzierżek More about me

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