We make apps everyone can play.

Qdan Inc. is an app studio in Kichijoji, Tokyo. We plan, build, and run smartphone apps including Dokopa (party games), Keikenchi (travel records), and Word Wolf.

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Apps

Dokopa

A party game collection playable anytime, anywhere on one smartphone

A party game app supporting 2 to 111 players, with 39 or more games including Word Wolf, werewolf, and unanimous-choice games. Works for both in-person play and remote play via LINE calls or Discord. Currently free to play, with no in-app purchases.

400k monthly users

Dokopa

Keikenchi

Record your travels across Japan's 47 prefectures as a score

An app that assigns scores to your experience in each of Japan's 47 prefectures across 6 levels — from "lived there" to "never visited" — and totals them up. Multiple maps can be saved simultaneously for year-by-year tracking or separate records per family member.

180k monthly users

Keikenchi

Figures like "400k monthly" are each app's monthly active users, based on our own analytics as of May 2026.