Sis

In development — no public release yet.

Sis is a local-first scratchpad built around one idea: six fixed, color-coded spaces and nothing else — no titles, folders, tags, or note-management screens between you and the editor. On the Mac it lives in the menu bar and opens in a popover; on iPhone and iPad it opens directly into a space.

Features

• Six fixed spaces with stable positions and empty/occupied/selected dot states; the selected space’s color tints the whole surface, including the Mac menu-bar icon
• Native text editors (NSTextView / UITextView) with autosave and undo/redo
• Markdown-first spaces with source-preserving live styling: headings, tables, fenced code, tasks, footnotes, and more, plus Source / Live / Live Raw display modes
• Hierarchical focus with breadcrumbs and subtree-only editing and export
• Local-first CloudKit sync through a private database, with durable offline queuing and three-way conflict resolution
• Widgets (small/medium/large) and App Intents for get/set/append/clear operations, backed by the same validation rules as the editor
• watchOS companion for browsing and appending to all six spaces
• Automatic local backups with verified writes, deterministic retention and pre-restore safety snapshots
• No analytics, no third-party runtime dependencies, no account service, no ads

Architecture

A shared Swift 6 package, SisCore, owns the domain, persistence, conversion, validation and sync policies — the app, widgets, intents and watch companion all apply the same limits and mutation semantics. A 100,000-character / 7.5 MB invariant is enforced before every editor mutation, import, restore and sync.

Tech stack