Only the current version so far — new entries appear as the app ships updates.
VOLC PDFリーダー is a tools app by Volcane with 1+ downloads (about 3 estimated). Released Apr 9, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “[Easy to use, no confusion] A PDF viewing app that anyone can use immediately with large buttons and simple Japanese. View manuals and documents as if you were flipping through a paper photo album.”
