Lexfolio: EPUB & PDF Reader

Lexfolio is a reading workspace for people who work with texts rather than simply read them — classicists, translators, theologians, philosophy students, and anyone who needs a source and its translation open at the same time. PARALLEL READING Open two books side by side and keep both positions exactly where you left them. Read an original next to a translation, a translation next to a commentary, or a grammar next to the passage that prompted the question. Each pane scrolls on its own, and reading positions survive closing the app. OFFLINE DICTIONARIES AND MORPHOLOGY Select a word to look it up. Lexfolio ships dictionaries for Ancient Greek — including the LSJ — Latin, English, French, German, and Spanish, and all of them work with no network connection. Ancient Greek forms show their lemma and a transliteration, so an inflected word resolves to its headword instead of leaving you to guess. Choose your own dictionary pairs; English is never mandatory. Build concordances over your own library. ANNOTATIONS THAT HOLD THEIR PLACE Highlight, write notes, and pin margin notes to an exact spot on a page. Annotations are anchored to the text, not to a page number, so they stay attached when a document is re-imported. PASSAGE ALIGNMENT Mark a passage in one book and its counterpart in another, and keep the pair as a verified alignment you can return to. Alignments belong to your research, not to a single reading session. VOCABULARY AND RECALL Send a word to the Vocabulary Vault as you read. Lexfolio turns entries into deterministic spaced-repetition cards and can bring them back through Recall Reading, so review happens inside the text rather than in a separate app. CONCEPTS AND KNOWLEDGE THREADS Link annotations across books into concepts and threads, so an argument you are tracking through several works stays assembled. SEARCH AND CITATION Search your whole library offline, including text recovered by on-device OCR from scanned pages. Export citation-aware references for academic writing. RESEARCH PROJECTS Group your work into projects and move them between devices as validated .lexfolio packages. The packages carry your research, not the books, so nothing you do not own travels with them. OPTIONAL AI, ON YOUR TERMS Lexfolio never sends your library anywhere on its own. If you want help, you can bring your own API key for grounded assistance restricted to passages you select, or open an in-reader sidecar for ChatGPT, Claude, or Gemini with a passage-and-bibliography handoff to your clipboard — you paste and send it yourself. Both are off unless you turn them on, and Lexfolio requires no key of its own. LOCAL BY DEFAULT Books, positions, annotations, notes, vocabulary, cards, concepts, threads, alignments, indexes, and OCR output are processed and stored on your device. iCloud synchronization for your reading and research data is available on iPhone and iPad and is yours to switch on. No ads, no account, no tracking. FREE FOR SEVEN DAYS, THEN A SINGLE PURCHASE Every feature above is open for seven days, with nothing withheld and no card required. After that, one purchase unlocks Lexfolio permanently on your Apple account — it is not a subscription, there is no recurring charge, and nothing you created during the trial is lost. Restore Purchases brings the unlock to your other devices.