Your notes are stored exclusively in your own iCloud account using CloudKit Private Database and iCloud Drive. KetBook has zero-trust architecture – we literally cannot access your data. There are no KetBook servers storing your notes.
KetBook works offline. Your notes are stored locally on your Mac and sync to iCloud when you're online. You can create, edit, and search notes without an internet connection.
KetBook supports AI-powered features when you provide your own Ollama Cloud API key. This includes semantic search, automatic tagging, content summaries, and smart suggestions. Your notes are only sent to the AI service you choose and control.
Yes. All your notes automatically sync across all Macs signed into the same Apple ID via iCloud. Changes are synced in real-time when devices are online.
$9.99 per month. Cancel anytime. Your notes stay in your iCloud account even if you cancel – we don't hold your data hostage.
KetBook uses Markdown for note formatting. You can export notes to various formats including plain text, HTML, and PDF. Import from Markdown, text files, or paste content from other apps.
KetBook requires macOS 13 (Ventura) or later. Built with Swift 6 and SwiftUI for optimal performance and security.