麻雀BOOK

Name: 麻雀BOOK
Author: JK-SCIENCE CO., LTD.

JK-SCIENCE CO., LTD.

⬇ 100,000+ downloads

Est. actual: 103,427

Free

Released: Sep 7, 2012

No in-app purchases

Contains ads

Signals

3 this week · 2 positive All of this week's signals →

📈Last 7 days +4 installs — 300% faster than the week before (+1) · 0/day since Oct 7
🏆Among Books & Reference apps bottom 40% by installs gained this week (344 peers growing)
🛠Updates quiet · updated 82 days ago

Installs since launch

+5 installs since Oct 7

Update history

2.8 Aug 20, 2026 · seen Oct 19, 2026

Only the current version so far — new entries appear as the app ships updates.

麻雀BOOK is a books & reference app by JK-SCIENCE CO., LTD. with 100,000+ downloads (about 103K estimated). +4 installs in the last 7 days. Released Sep 7, 2012. Install growth, rank history, SDKs and ad networks.

From the store listing: “当アプリは、マージャンを始めてみようと思っている初心者の方や、中級者・上級者で役を忘れた際や点数が分からない際に辞書的にご利用いただける麻雀入門アプリです”