TheReader Lab

Organize local files with custom tags, ratings, and collections. Supports EPUB, FB2, TXT, Markdown, HTML, RTF, DOCX, ODT, CBZ, and OPF. Quickly look up unfamiliar words while reading, learning new languages, and exploring specialized literature without leaving the book or switching to other apps with the ability to add an unlimited number of your own dictionaries (by importing StarDict or XDXF dictionaries). No accounts, no ads, no tracking, and no cloud syncing. All your books and notes stay strictly on your device. Turn passive page scrolling into active exploration.