Install guide

Install SysWatch and pair your phone

SysWatch has two parts: the desktop app on the PC you want to watch, and the Android app on your phone. Install the desktop app first, then pair the phone.

Download the desktop app

SysWatch runs on Windows 10 and Windows 11, 64-bit. The installer is SysWatch_0.2.1_x64-setup.exe, about 3.5 MB. The phone app needs Android 7.0 or newer.

Download for Windows Get it on Google Play

Every version and its release notes are on the SysWatch releases page on GitHub. To update, run the new installer over the old version: your pairing code and settings are kept.

Install on Windows

Download SysWatch_0.2.1_x64-setup.exe and run it.
Windows SmartScreen may say “Windows protected your PC”. Choose More info, then Run anyway. The installer is not code signed yet.
Finish the installer and open SysWatch. It lives in the system tray.
Choose how your phone connects. The first run shows three cards: Local, Cloud by DevLune and Tailscale. Pick one, follow the steps it shows, and it ends on the pairing code.

Choose how your phone connects

SysWatch asks this the first time it opens and never asks for server details. You can change your answer later in Settings, where the same three choices appear as cards.

Compare	Local	Cloud by DevLune	Tailscale
Works from	The same Wi-Fi	Anywhere with internet	Anywhere
Needs	Nothing else	Internet on PC and phone	Tailscale on PC and phone, set up once
Speed	Instant, straight from the PC	About 2 seconds per update	Instant, straight from the PC
Where the readings go	They never leave your network	Through DevLune’s relay	Through your own private Tailscale link

Not sure? Pick Local if the phone sits near the PC, and Cloud by DevLune if you check your PC from outside and do not want to set up Tailscale. Local and Tailscale need the latest version of both apps.

Local mode uses one port, 47800. The first time, Windows Firewall asks whether to allow SysWatch on private networks: choose Allow. Local mode is not encrypted, and the 6-character pairing code is the only lock, so use it on networks you trust: your home Wi-Fi, or Tailscale, which encrypts everything itself.

Want local speed away from home? The Tailscale guide takes about five minutes.

Pair the phone

Install SysWatch from Google Play and open it.
On the PC, open Pairing. The first run ends there by itself. A QR code and a 6-character code appear.
On the phone, tap Scan the code on your PC and point it at the QR code.

That is all. The QR code carries the mode, the address and the port, so there is nothing to type.

If it does not connect

What you see	What to check
“PC not reachable” in local mode	Phone and PC are on the same Wi-Fi (not guest Wi-Fi, which isolates devices). Windows Firewall allowed SysWatch. The desktop app is running.
Connects at home, not outside	Local mode needs Tailscale away from home. See the Tailscale guide.
“Code not found”	The PC made a new code. Open Pairing on the PC and scan again.
Stuck on “Paused”	The desktop app is paused. Open it and press Resume.
Port already in use	Change the port in the desktop app’s Settings, then scan the new QR code.

Still stuck? Open an issue on GitHub or ask on Discord.