Nucleus — All-in-One Offline Workspace OS

Your entire workspace — docs, databases, tasks, goals, habits and more — in one private app that runs 100% offline. No account. No subscription. No cloud. Yours forever.

People pay monthly for workspace apps, get locked online, and lose access the moment the wifi drops — or the company changes its pricing. Nucleus gives you the whole experience in a single file that opens in any browser and saves everything to your device. Own your second brain.

18 connected tools in one workspace

• Docs & wikis — a rich block editor (headings, to‑dos, callouts, toggles, code, quotes) with Markdown shortcuts and nested pages.
• Databases with 5 views — Table, Board (Kanban), Calendar, Gallery and List, with custom typed properties (status, select, date, rating, and more), filtering, sorting and grouping.
• Tasks — board, list and calendar views, priorities, projects, subtasks and quick capture.
• Projects with milestones and auto‑progress · Goals & OKRs with measurable key results.
• Habits tracker with streaks · Journal with mood tracking · Notes, Contacts (CRM) and Bookmarks.
• Templates gallery — spin up a CRM, content calendar, tracker or planner in one click.
• Insights dashboard, a ⌘K command palette, global search, and a guided tour.

Made to feel like yours

• A 30‑second setup wizard personalizes your workspace.
• Light & dark themes with 7 accent colors.
• One‑click JSON backup/restore, plus Markdown & CSV export.

What's included

• Nucleus.html — the complete offline workspace app (just double‑click to open).
• Nucleus Workspace Planner (Excel) — a premium companion workbook: dashboard with live charts, tasks, projects, goals, a habit heatmap, content calendar, CRM and more, with formulas, dropdowns and conditional formatting.
• Quick‑Start & How‑To guides, plus a license.

Works on Mac, Windows, Linux, Chromebook and tablets — anywhere with a modern browser. 100% offline & private · No subscription, ever · Instant download · Lifetime access.