LOCAL · DESKTOP
Full use, no signup
No account requiredInstall on Windows, macOS, or Ubuntu and work completely locally, even offline.
- Core apps in one workspace
- Data stays on your machine by default
- Use local AI or bring your own key
Personal Operating System · Local-first
All your digital work, in one operating system
Core apps — notes, tasks, calendar, docs and an AI assistant — unified in one space. Runs right on your machine. Your data stays yours.
Free · No signup · Works offline
✦
Today
Send the design proposal
Read 3 saved articles
✦ Apus Assistant
Runs 100% on your machine
Free · No signup · Works offline
Part of the Apus ecosystemApus CorpApus PlatformApus Commerce
Start local. Add Cloud when you want to work anywhere.
Desktop is the complete personal OS, running on your machine with no account. Sign up for Cloud when you want web apps, desktop sync, and the mobile superapp.
You choose the boundary
APUS ONE CLOUD
Web apps and continuous sync
Cloud account requiredOpen the same workspace in a browser; desktop data syncs so you can continue at any time.
- Apps available on the web
- Desktop ↔ Cloud ↔ web sync
- Backup and multi-device access
MOBILE · SUPERAPP
Your personal OS in your pocket
Cloud account requiredMobile is a superapp using the same Cloud workspace, memory, and AI assistant.
- Apps, tasks, and content in one app
- Continue from desktop or web
- AI works with the same synced context
Clear from day one: signup is not required for local desktop use. You only need an account when you choose Cloud or mobile.
Many devices, one workspace, one memory layer.
Apus One shows exactly where data and AI flow through each layer — a transparent architecture designed for one person.
- Desktop · Web · MobileThree access surfaces; desktop keeps working independently without Cloud.
- App workspaceNotes, tasks, calendar, docs, and apps share one context.
- NOUS · Knowledge GraphMemory and the knowledge graph connect data across apps instead of creating new silos.
- Hybrid AI RouterEach task routes to a local or external model based on sensitivity and capability.
- Agents · Skills · AutomationAI does more than answer: it can draft, create tasks, update calendars, and run approved workflows.
AI is built into the operating system, not isolated in a chat box.
One assistant can understand the open app, retrieve memory, choose the right model, and take action across tools.
- Shared context across apps
- Local-first handling for sensitive data
- Only task-specific context sent to external models
- Actions and automations stay under your control
What Apus One is
One platform. Four pillars. Endless done.
Instead of 10 scattered apps, everything you need to think, do and remember — living together, understanding each other.
Capture & Think
Notes, docs, whiteboards — linked into a "second brain".
Do & Done
Tasks, projects, calendar — one flow from idea to done.
Save & Find
Every file, link, and note — found in 1 second, even offline.
An AI assistant that gets you
Hybrid AI (local + public) reads your context to answer, summarize, and draft — private, never leaving your machine unless you want.
Tasks · One flow
From idea to "done" — without leaving the window.
Capture a thought as a note, turn it into a task, drop it on the calendar — all in seconds, auto-linked.
Dive deeper →Draft the presentation
Schedule the team meeting
Send the client invoice
Knowledge Graph · NOUS
Everything you know — connected into one brain.
Notes, files, tasks auto-link. The AI follows that network to answer in your exact context.
Dive deeper →Why Apus One
Six reasons to switch today.
Completely private
Your data lives on your machine. Even we can't read it.
✨
Far cheaper
Use Local for free; add Cloud only when you need web, sync or mobile.
Fast, works offline
Native on your machine — no lag, no network dependency.
Core apps, 1 place
No more tab-switching. Every tool understands the others, sharing one context.
Hybrid AI, your own
Use local AI or your own key (BYOK). No vendor lock-in.
Grows with you
Personal → team → startup. Move to Apus Platform when you're ready.
Who it is for
One OS, many digital lives.
Students
Take notes, revise, manage deadlines — AI summarizes materials in seconds.
Professionals
Projects, meetings, work docs — tidy in one focused space.
Freelancer & Creator
Ideas, clients, invoices, content — all in one place.
Founders & small teams
Run your startup from day one — ready to move to Apus Platform as you grow.
Your data never leaves your hands.
Local-first means every note, file and thought lives on your device. Encrypted by default. Even we cannot read it.
See how security works →Pricing
Local is free. Add Cloud when you need more.
Use the full desktop experience without an account; add Cloud for web, sync and mobile.
For the curious
Inside Apus One.
NOUS — 5-tier memory. Hybrid AI routing local/public. A knowledge graph connecting all you know. Open, transparent architecture.
Explore how it works →Knowledge Graph · interactive
Local desktop needs no account — links pending approval.
The desktop app is free; official installer links will open after approval.
Installer links pending for Windows · macOS · Ubuntu