Origin
Notes, plans, to-dos and small databases tend to live in several apps at once. Tackbook brings them onto one page: every line is a block, every table row is a page, and the day starts with a note topped by your Apple Calendar events.
Island 03 · Tackbook
The document leads.
Tackbook is a notebook made of pages and blocks – for Mac, iPad and iPhone, each built for its own device.
Join the waitlist on tackbook.app (German) (opens another website) Status: Waitlist open
From the studio
From the studio
Principles
No account, no Tackbook server. Your pages live on your device and sync through your private iCloud, end-to-end encrypted with Advanced Data Protection. No analytics library, and you can leave any time with Markdown or PDF.
AI with a paper trail: when Claude writes along through the MCP server on your Mac, every block it changes is marked, and every change can be undone. The mark tells you where an edit came from – not whether it’s right.
Tech
Swift 6 and SwiftUI for macOS, iPadOS and iOS 26. Only the navigation turns to Liquid Glass; the page stays paper. Storage is SQLite, sync runs on Apple’s CloudKit, and the MCP server is a separate program inside the app bundle, built on the official Swift SDK.
Status
In development, with the waitlist open on tackbook.app. The plan is the App Store, one purchase for Mac, iPad and iPhone. Price and date follow once they’re fixed.
tackbook.app
The pages are over there.
What Tackbook already does, what’s in progress and what’s planned – on tackbook.app (in German).