GROK BUILD* · ANDROID · WINDOWS

cBuildRemote

Your PC’s Grok Build*, on the phone.

A free Android app and a Windows installer. The PC must already have Grok Build* installed and signed in. Without that, the Windows app does not open sessions, folders, or PowerShell windows.

Download for Windows

Installer 136 · about 206 MB · per user, no Node, no Tailscale.

Google Play · coming soon

Grok Build* is required.

Install Grok Build * and sign in with your X account before you open cBuildRemote on Windows. Both sides say this plainly: without Grok Build* there is nothing to control.

Link the phone to the PC

1
On the PC, confirm Grok Build* is installed and the X account is signed in.
2
Install cBuildRemote for Windows and open it. It shows a QR and the same code as text you can copy.
3
On the phone, install the app. Scan the QR or type the code. The camera is optional: a tablet can paste the code.
4
Only the same X account that is signed in to Grok Build* on that PC is accepted. Another account that reads the QR is refused.
5
One computer, one QR. That QR enrolls several phones and tablets at the same time. Each device gets its own access. Do not put two PCs on one QR.
6
Either side can be installed first. If the phone does not detect Windows yet, the app says so, offers this download, and lists the steps.

Devices

The Windows window lists the name (it starts as the Android model and you can edit it), the IP, the approximate region, last seen, and whether it is online. If the tunnel does not send an IP, the list shows “unknown”.

Revoke

Revoking one device removes that device. The others stay. Revoking the QR mints a new code and cuts every device enrolled under the old secret. That is what you do if the code leaks.

Reinstall

Uninstall removes the program and the startup shortcut, and keeps the pairing. You do not scan again. The secret is wiped only when you revoke the QR.

Start after you sign in to Windows

cBuildRemote stays here on the tray, and it does not take a taskbar button. Closing the panel leaves it there. Unattended start is off by default. If you turn it on, the icon appears only after that Windows user signs in. The QR does not change. It does not start before login: Grok* sessions, folders, and OneDrive exist only in that session, and resuming a chat opens a PowerShell there. It does not open an inbound firewall port.

The quick tunnel goes through Cloudflare

Discovery is not encrypted only between the phone and the PC. The Windows window says the same, in one line.