1.8.14
Oct 27, 2026 · seen Oct 30, 2026
1.8.12
Oct 12, 2026 · seen Oct 19, 2026
スキマ勉 危険物乙4 試験対策 (ロック画面+Alarm) is an education app by ExaBit with 10,000+ downloads (about 16K estimated). +220 installs in the last 7 days. Released Oct 17, 2025. Install growth, rank history, SDKs and ad networks.
From the store listing: “This is a lock screen study app that allows you to automatically study past questions and study materials for the Dangerous Goods Class 4 exam little by little every time you turn on your smartphone.”