hYYa ink

Now reads scanned pages. On-device text recognition turns a scan into a PDF you can search, select — and that the AI actions can finally read. Nothing is uploaded.

Stop reading syntax. Start reading documents.

hYYa ink is the universal document engine: it opens the files developers, students, and academics live in — and turns them into beautiful, readable, editable documents instead of walls of raw text. On Mac, iPhone, and iPad.

ONE APP, EVERY FORMAT

• Markdown — rendered live, with a formatting toolbar (bold, headings, lists, quotes, links)

• JSON, YAML, TOML — interactive collapsible trees you can edit in place

• CSV & TSV — a real table, editable cell by cell

• Mermaid & Graphviz — diagrams drawn instantly, fully offline

• LaTeX — math typeset beautifully

• Jupyter notebooks — cells, code, and outputs, cleanly laid out

• AsciiDoc, Org-mode, XML, diff, logs — readable at last

EDIT, DON'T JUST VIEW

Edit the source and watch the document update. On Mac and iPad, a split view shows source and preview side by side. Edit JSON trees and CSV tables directly in the preview — hYYa ink writes valid syntax back for you. Full undo, native editing.

PDF — READ, SEARCH, ORGANISE, SIGN

Open any PDF as a real document. Find any word with a live match count. Browse by page thumbnail or by the document's own contents. Password-protected? hYYa ink asks for the password and opens it.

hYYa ink never hunts for fields or boxes — tap the exact spot you want and type, then drag to fine-tune. Sign by hand and place, resize and rotate your signature. Mark up a page freehand with pen, pencil and marker, or highlight, underline and strike through the text you select.

Turn a scan into a document. On-device text recognition adds a searchable text layer, so a photographed page becomes something you can search — and something the AI actions can actually read. It runs on your device; nothing is uploaded.

Then reorganise pages, protect with a password, compress, watermark, or compare two versions to see which pages changed. Every one of these writes a NEW file and leaves the PDF you opened untouched.

BRING YOUR OWN AI

Connect any OpenAI-compatible provider — OpenRouter, OpenAI, Groq, Together AI, or your own custom endpoint. Then Explain, Summarize, Reformat, Fix errors, or generate Mermaid diagrams from your document. Your key stays in the device Keychain; only the open document is sent, and only when you ask.

PRIVATE BY DESIGN. BEAUTIFUL BY DESIGN.

No accounts. No tracking. No data collection. Everything renders offline on your device — apart from the App Store's own purchase check, the only network calls are the AI requests you explicitly make to your own provider. Your documents never leave your device unless you ask.

FREE TO READ, PRO TO EDIT

Reading and previewing every format is free forever — so are Export to PDF, Print, Find in document, Pages and contents, and opening password-protected PDFs. A 7-day full trial unlocks everything; a single one-time purchase keeps editing and AI yours forever — across Mac, iPhone, and iPad.

On Mac, Quick Look works too: press Space in Finder for a beautiful preview.

From hYYa — more than apps. Companions you can trust.