CASTRA.

One click.
Every window
in its place.

Castra opens your apps, websites and tools — each on its own display, at its own size and spot.

Download for Windows Watch the tour 3:25
Example: three displays on a desk. Castra on display 01 presses Launch all and five windows open one by one: OBS Studio and Stream chat on 01, Stats dashboard on 02, YouTube live and Discord on 03. The example repeats every few seconds.

Your whole setup in one window.

Point at any part of the window to see what it is.

The Castra app: profile tabs at the top, a 3D map of the displays on the left, the workspaces on the right, and Put back, Close all and Launch all at the bottom

The browser, under control.

  • A volume mixer for every tab that plays sound.
  • Volume on top of the site's own — a player at 50% with Castra at 40% plays at 20%.
  • Zoom that sticks, even after a browser restart.
  • Auto sign-in for the workspaces where you switch it on.
Add to Chrome

Works in Chrome, Edge and Brave. Optional — Castra runs without it.

The Castra mixer in the browser toolbar: YouTube live — Match day at 20% volume, with Stream chat and a radio tab below

Your setup, one click away.

Download for Windows Read the manual