DoCube
docube.venglyph.com · Notes & Knowledge
Local first reading and knowledge app for Mac, iPhone and iPad: annotate PDFs, EPUBs, web pages and videos, search by meaning offline, and review highlights as flashcards.
DoCube collects PDFs, EPUB books, web pages, Markdown notes and videos into one library on your own devices, synced through your iCloud account rather than the developer's servers. You can highlight and annotate in six colours, and links point to an exact page, paragraph or video timestamp instead of just a file.
Search covers document text, highlights, notes and cards together. After you download a local model, semantic search works offline, so you can find a passage by meaning. AI summaries are optional and use an AI service you configure yourself; only the relevant snippets are sent to it. Other features include on device OCR for scanned PDFs, Whisper subtitles for videos, selection and full text translation, and spaced repetition review cards built from your highlights.
It runs on macOS, iPhone and iPad (iOS 17 or later). The free version is limited to 5 documents, and a one time in app purchase buys the Professional edition on all your devices. There is no Windows or Android version.
DoCube is one of 15 note and knowledge tools on Ryza. See all note and knowledge tools or how we check facts.
