EbookConverter wraps gryf/ebook-converter (a Calibre fork) to run natively on Android via Chaquopy. Features: - Convert between 20+ ebook formats directly on your phone - Input: epub, mobi, azw3, azw4, docx, odt, fb2, html, htmlz, lit, lrf, pdb, pml, rb, rtf, snb, tcr, txt, djvu, chm - Output: epub, mobi, azw3, docx, fb2, htmlz, html, lit, lrf, oeb, pdb, pml, rb, rtf, snb, tcr, txt, txtz - Output profiles for Kindle, Kobo, Nook, iPad, and generic e-ink devices - Metadata editing (title, authors, publisher) - Font size and margin controls - Dark mode support - No internet required — all conversion runs locally Limitations: - PDF input/output not supported (requires poppler and PyQt5, unavailable on Android) Licensed under GPL-3.0.