Treo Markdown vs Vocalize AI

Your Markdown, close at hand. Treo is a Markdown and text editor for iPhone and iPad. Open a document from Files or create a new one, write at your own pace, and switch to a clean preview when you want to read. WRITE WITH YOUR FILES Open documents from iCloud Drive, On My iPhone, and other Files providers. Search your text, rename files, make copies, and share your work. READ YOUR WAY Choose a theme and adjust reading and editor text sizes independently. Move between the editor and Markdown preview as you work. SYNC WITH YOUR OWN COMPUTER Optionally connect to a Syncthing computer you manage. Guided setup helps you choose your computer and folders. Review transfer activity, keep selected folders available offline, and review file conflicts. Syncthing stays off until you set it up. Treo requires no account and includes no built-in cloud service. You choose the computer and folders to connect. Setup instructions and privacy details are available on our website.

Vocalize AI is your private AI library. Import PDFs, EPUBs, web articles, YouTube transcripts, and scanned paper. Record voice. Ask questions across everything you saved and get answers with citations — all on-device. Listen to any of it with natural voices, turn it into a two-voice audio overview, and review your highlights every day. Your content stays on your iPhone. Vocalize AI never uploads what you save. ASK YOUR LIBRARY • On-device AI chat across every document, recording, web article, and YouTube transcript you've added. • Citations expand to the original excerpt and tap through to the source. • Scope each question to the current source, a folder, a selection, or your whole library. AUDIO OVERVIEW • Turn any document, EPUB, web article, or transcript into a two-voice podcast. • Pick the length in minutes. Generation runs on-device. • Saves into your library as a normal recording, ready to AirDrop. READ ANYTHING ALOUD • Premium voice catalog with 20+ neural voices across 10 languages. • Playback speeds up to 5×, with pitch preserved. • Personal Voice support for users who set one up in iOS Settings. REMEMBER WHAT YOU SAVE • Highlight as you read. Add a note on any highlight. • Daily Review resurfaces highlights on a gentle spaced-repetition schedule. • Home-screen and lock-screen widgets show today's review count. EXPORT INTO YOUR STACK • Markdown, Obsidian (wikilinks + callouts), Notion (paste-friendly), and Readwise-compatible CSV or JSON. • Export a single highlight, a full document, a folder, or your whole library. • Stable links back to the source survive across editors. YOUTUBE TRANSCRIPTS • Share any YouTube URL into Vocalize AI to save the transcript. • Listen, search, and ask questions about it like any other source. SMART CAPTURE • Scan paper documents with on-device OCR into searchable PDFs. • Record meetings with calendar integration and one-tap start. • Import from Files, Mail, or any iOS share sheet. PRIVATE BY DESIGN • All AI runs on-device. Nothing is uploaded. • iCloud sync is optional and uses your private database only. • No account required. No analytics about your content. REQUIREMENTS • Requires iOS 26.2 or later. • Cross-Library AI and Audio Overview additionally require an Apple-Intelligence-capable device (iPhone 15 Pro or newer, or an iPad with M1 or newer). • Everything else — capture, reading, voices, exports, highlights, scan, web, YouTube, EPUB — works on every device that runs the app. PRO • Vocalize Pro is a one-time purchase that unlocks AI Voice Separation for cleaning noisy recordings. • Every other feature listed above is free, with no caps.