Your whole desktop,
right where you left it.
Terrarium is a desktop app — not a phone one. Browser tabs, notes, timers and mini-apps on a pinboard you never have to rebuild. Quit, come back, and it's all still there — down to the seconds on a running timer.
A pinboard you pan and zoom.
Drag any empty space to pan, from anywhere, at any zoom. ⌘-scroll zooms toward the cursor. Hit Fit and every window snaps into frame.
- Floating windows — drag, resize, raise, snap to an edge to tile
- Layers: send behind, keep normal, or pin always-on-top
- Workspaces — a row of pills, each with its own windows and theme
Everything, in one window manager.
A real browser, real notes, real files — plus the small stuff you keep reaching for.
- Browser with real Chromium tabs and logins that stick
- Rich-text Notes with a saved library · a File viewer for images and PDFs
- A live mirror of any Mac app · Reminders, Timer, Alarm, Stopwatch, Clock
One keystroke to anything.
A fuzzy command palette over every action — open a panel of any type, run layout and zoom commands, jump between workspaces, open settings. Rebind the shortcut if ⌘K isn't yours.
Themed down to the pixel.
Light and dark, glass chrome, styled scrollbars. Set the accent, text and background colour, or drop in a background image — for this workspace, or all of them at once.
The same desktop, wherever you open it.
Windows, positions, layers, note contents, workspaces and themes are kept as plain files — not locked inside one computer. They sync end-to-end encrypted, so the server only ever relays a blob. Open Terrarium on another machine and your setup is already there. macOS ships first; Windows is the next port.
Where it's going
- A third-party plugin runtime — web, worker and native tiers
- Connectors with an MCP layer, so an in-app Claude gets tools for free
- In-app Claude — an edge-bar chat, a full panel, and ⌘K
- Cross-device sync — end-to-end encrypted layouts, notes and themes
- A mobile companion shell
- The Windows port
Terrarium is coming to macOS.
It's in early development. Drop your email and we'll tell you the moment the beta opens.