LocalRAG is a privacy-first iOS app that lets you chat with your documents using Claude AI. Unlike cloud-based services like ChatPDF or PDF.ai, LocalRAG processes everything on your iPhone or iPad — your documents never leave your device.
How it works: Import a document in any of 9 supported formats (PDF, EPUB, DOCX, HTML, RTF, TXT, MD, CSV). LocalRAG extracts text, splits it into chunks, and builds a TF-IDF search index — all locally. When you ask a question, only the most relevant excerpts are sent to Claude AI, and you get answers with source citations.
Key features:
- 9 document formats with on-device processing
- 3-stage PDF extraction (text, copy-protection bypass, OCR for scanned pages)
- Hybrid search: TF-IDF + bigram matching + page-number queries
- Source citations with page numbers
- Document collections for organized conversations
- 8 languages supported
- Free tier, subscriptions, or bring your own API key
