Use an updated Android PDF Viewer with 16 KB page size alignment
Only the current version so far — new entries appear as the app ships updates.
Kanji Worksheet Generator is an education app by Setsuna Nand with 1,000+ downloads (about 1.1K estimated). +4 installs in the last 7 days. Released Aug 5, 2019. Install growth, rank history, SDKs and ad networks.
From the store listing: “Japanese Kanji Worksheet Generator”