WhattaRAG vs Byeori

WhattaRAG answers questions about your own documents, entirely on your iPhone. Add a document — a PDF, a Markdown or text file, a link to an article, or text you paste in — and ask about it in plain language. Answers come back with citations to the exact passages they came from, so you can check the source rather than trust the model. Everything runs on the device The model, the search, and the document database all live on your iPhone. There are no accounts, no sign-in, no analytics, no crash reporters, and no advertising SDKs. Your documents and conversations are never uploaded, and the app works in airplane mode. The one exception is Add by URL: when you paste a link, the app fetches that page so it can read it. That is the app's only outbound network request, it happens only when you ask for it, and the fetched text is then stored on device like any other document. What it's good at • Finding a specific fact in a long document and citing where it came from • Questions about one section, one clause, one table, one paragraph • Reference material you return to — handbooks, papers, contracts, manuals, documentation • Working offline, on a plane, or anywhere you would rather not send a document to a server What it isn't It isn't a general chatbot, and it won't answer from outside your documents. Broad questions across an entire document — "summarize everything", "which is best", "how many in total" — are the weakest case, because the app reads the most relevant passages rather than the whole text. It tells you when an answer may be incomplete rather than pretending otherwise. Built native 100% native Swift and SwiftUI, around 4 MB. No web view, no bundled runtime, no JavaScript bridge. That's why it launches instantly and why it's small. Now in English and Spanish.

Byeori isn't a notebook. It's a brain that thinks as you write — and speaks first. Note apps only store. Chatbots only answer when asked. And in the moment you need it, nothing comes to you. Byeori is different — you just capture, and the brain does the thinking. ■ Mirror — it reflects you back As you write, the brain draws the gap between who you think you are and what your notes actually say. Not from anyone else — from your own words. ■ Today's Provocation — it names the two voices inside you "I must be perfect to start," and yet "I only improve by shipping." It surfaces a contradiction you couldn't see, with the exact sentences behind it. ■ Connections that come first — it links before you ask Forgotten notes, two ideas that quietly touch — the brain surfaces them for you. No search terms to remember. ■ Grounded in your notes, not hallucinations It extracts atoms (claims, self-descriptions) from your writing, finds opposite polarity on the same concept, and recalls what's semantically scattered. It never speaks without evidence. ■ Near-zero friction to capture By hand or by voice, the moment it strikes. A one-line journal becomes a habit, and the same brain grows on your phone and on the web. ■ Start today in three sentences No need to write a lot. Answer three prompts and within minutes the brain speaks to you for the first time. Write more, and new axes open — mood, trajectory, self-gap. Write → the brain reflects → you write more → the brain deepens. For everyone who thinks. Wake up your second brain with three sentences today.