Sync
PowerSync under the hood
Clients and server reconcile through PowerSync's
open-source edition. Conflicts are logged, not silenced.
Personal operating system · Self-hosted
Feel anchored in your own life.
Altair integrates the goals you are working toward, the knowledge you are collecting, and the resources that make a household run — in one calm, self-hosted place you own.
Principles
Built for the long term, not a launch.
These aren't marketing bullets — they are architectural commitments that shape every decision in the codebase.
Offline-first
Clients work independently and sync when connected. No internet required for core functionality — a patchy cabin weekend is just another day.
Self-hosted
You own your data. Altair runs on a Raspberry Pi 4 with 4GB of RAM, or any small VPS. No SaaS dashboard decides whether you keep access next quarter.
Sync-safe
Conflicts are detected and surfaced, never silently overwritten. If two devices disagree about a quest, you get to decide — not the last writer.
AI-optional
Semantic search and suggestions enhance Altair, but the app works fully without them. No network call is required for the app to function.
Three domains, one graph
The parts of a life that already interlink.
Guidance, Knowledge, and Tracking connect through a shared relation system. Tag anything, link anything to anything, and search across all of it.
Guidance
Goals that do not get forgotten.
A hierarchy for the things you are working toward —
from "ship a side project" down to "fifteen minutes of
Spanish this morning." Routines take care of themselves.
- • Initiatives, epics, quests, routines
- • Focus sessions and daily check-ins
- • Routines automatically spawn quests
Knowledge
A second brain that stays yours.
Capture what you are learning, connect it to what you
already know, and find it later. Links are first-class;
snapshots protect the past from future edits.
- • Markdown notes with [[wiki-links]]
- • Automatic backlinks and snapshots
- • Full-text + optional semantic search
Tracking
The household, without the spreadsheet.
Pantry, garage, medicine cabinet. Know what you have,
where it is, and when you ran out last time.
Shopping lists stay linked to real inventory.
- • Inventory across locations and categories
- • Low-stock alerts and shopping lists
- • Consumption and purchase logs
What's in the box
The parts that make it work.
Storage
S3-compatible attachments
RustFS stores files with an S3 abstraction, so you
can swap to MinIO, Garage, or any provider later.
Auth
Built-in, boring, solid
Argon2id password hashing and JWT sessions. No external
identity provider required to get started.
Search
FTS plus optional embeddings
Keyword search with PostgreSQL full-text,
and pgvector for semantic search when you want it.
Clients
Web and Android, native
SvelteKit on the browser, Kotlin/Compose on Android.
Both offline-first, both first-class.
Deployment
Pi-friendly by design
4GB RAM minimum, 8GB recommended.
Docker Compose sets up Postgres, RustFS, and the
Rust API in one command.
Ready when you are
Clone the repo, start a Pi, keep your data.
Altair is licensed under AGPL v3+. That means you can run it, modify it, and share it — on the condition that improvements stay free for the next person.