Every Android reader either mangles study material or wants an account first. GemReader does neither. Textbooks, lecture PDFs and interactive workbooks in one offline library. Workbook answers save themselves. Highlights become a spaced-repetition deck inside the reader — no export step — and existing Anki decks import. Everything is encrypted on the device. No account, no cloud, no telemetry, no ad SDK. Everything in the app today is free and stays free.