HappyCode Lab

How this developer operates

• Carrier title 九九チャレ - かけ算の学習をおうえんします holds 79% of the developer's installs
• Hit rate 0% of launches reach 100k installs (0 of 3 at least 30 days old)
• Release rhythm a new app every ~3.0 years on average
• Maintenance 3 of 4 apps updated in the last 90 days · last update 61 days ago

All apps

App	Style	Rating	Installs	Released
九九チャレ - かけ算の学習をおうえんします	Education	—	10,000+	—
CalculatorDU - for daily use	Tools	—	1,000+	Aug 7, 2020
ClockLesson - Learn by touch	Education	—	1,000+	Nov 10, 2022
歴史タイムライン - 日本史と世界史を年表で俯瞰	Education	—	10+	Aug 31, 2026