Local
Same Wi-Fi
- Works from
- The same Wi-Fi
- Set up
- Nothing
- Speed
- Instant, straight from the PC
- Where the readings go
- They never leave your network
Not encrypted on the local network, so use it on a network you trust.
PC monitor for Android · by DevLune
Your PC's gauges,
on your phone.
SysWatch is a PC monitor for your phone. A small Windows app reads your CPU and GPU load and temperature, memory, network, storage and battery. Your Android phone shows them live, like a system monitor you can carry around, and tells you when one crosses a limit you set. Free, no ads, no account.
Desktop 0.3.0, published 11 Nov 2026 · Windows 10 and 11, 64-bit · Android 7.0 and newer
- standby faces
- 24standby faces
- Overview layouts
- 5Overview layouts
- ways to connect
- 3ways to connect
- ads or accounts
- 0ads or accounts
What you see
Your PC stats on your phone, as they move
SysWatch only shows real readings. If your PC does not report something, it is left out.
Alerts
Know when your PC runs hot
Set a limit on any gauge. Your phone tells you when it is crossed, so you can watch CPU and GPU temperature without staring at the screen.
- Rules read as sentences, such as "CPU load above 90%" or "Battery level below 20%".
- Each limit is drawn as a red line on its gauge, bar and graph.
- Limits on load, memory, battery, network speed, storage and temperatures.
- A quiet period per alert, from 1 minute to 1 hour, so one spike is one notification.
- One-tap starter alerts, and export and import as a file.
CPU load81%
Limit 90% · CPU load above 90% · do not repeat for 5 minutes
Look and layout
Your style, your colours, your order
Pick a style, an accent and a theme, then put the cards in your order. All of it is chosen in setup and can be changed in Settings.
Six styles
Stickers, Solid, Banner, Tiles, Pills or Classic. Each one arranges the same readings differently.
Your accent colour
Cobalt, amber, cyan, green, violet, rose or mono, or matched to your wallpaper on Android 12 and newer.
Three themes
Light, dark or true black, in every style.
Five Overview layouts
Bridge, Gauges, Strip charts, Ledger and Focus.
Your cards, your order
Choose which cards show and in what order, roomy or compact.
Standby and widget
A second screen for your desk
Stand the phone next to your keyboard and it becomes a second screen for your PC stats: 29 always-on standby faces, 16 instruments, 8 art faces and 5 music faces, in portrait and landscape. The art faces are Horizon, Blocks, Bauhaus, Ink, Weave, Bloom, Type and Pixel.
Made to stay on
Burn-in protection. Faces can dim when idle or stay bright, and sit in a margin or fill the whole screen. Each one is picked from a gallery that previews it with your own readings.
Home screen widget
Four looks: rings, bars, numerals and trace, in three sizes. It shows "PC offline" when the readings stop.
Now playing
See what your PC is playing
Music or a video on the PC shows on your phone with its cover: a card on Overview, and five music standby faces for the desk, Poster, Ambient, Glossy, Vinyl and Quiet. Play, pause and skip from the phone.
It works in Local and Tailscale mode only: what you play never goes through the cloud. Control from the phone is on by default and is one switch in Settings on the PC. A browser hands Windows a small thumbnail, so a video shows a smaller cover than a music app does.
Connection
Three ways to connect
Both apps ask the same question the first time they open. Pick the same answer on each. You can change it later in Settings.
Cloud by DevLune
From anywhere
- Works from
- Anywhere with internet
- Set up
- Nothing
- Speed
- About 2 seconds per update
- Where the readings go
- Through DevLune's relay
Readings and your phone's name pass through the relay. You never enter any server details.
Tailscale
Private, from anywhere
- Works from
- Anywhere
- Set up
- About five minutes, once
- Speed
- Instant, straight from the PC
- Where the readings go
- Through your own private Tailscale link
Tailscale encrypts the link. It is a separate app with a free personal plan.
Not sure? Pick Local if the phone usually sits near the PC. Local and Tailscale need the latest version of both apps. The Tailscale steps take about five minutes.
On your PC
A small app that stays out of the way
The Windows app reads the hardware, shows its own dashboard and lives in the system tray.
Three looks
Keep the original dark glass, or pick Bold light or Bold dark in setup or Settings. Updating changes nothing until you choose.
Light in the tray
Hidden to the tray it closes its window and uses about 55 to 73 MB of memory and under half a percent of one CPU core. Lightweight mode slows sampling further.
In your language
English, German, French, Spanish and Russian, starting in your Windows language. New text arrives without an update.
Now playing
A card on the dashboard shows what is playing, read from Windows media controls. Sharing it with the phone, and letting the phone control it, are two switches in Settings.
Languages
In five languages, open to more
Both apps ship in English, German, French, Spanish and Russian, picked on the first screen. The four translations were machine written and have not been reviewed by native speakers yet, so corrections are welcome.
Anyone can add a language or fix a line: it is one text file per language, and no programming is needed. A merged translation reaches both apps by itself, with no app update.
Open the translations folder on GitHubHow it is built
Two apps, three transports, one QR code
- Two apps
- A Windows app built with Tauri v2, Rust and React reads the hardware and sits in the system tray. An Android app in Kotlin and Jetpack Compose shows the readings, runs the alerts, the standby faces and the widget.
- Three transports
- Local is a small HTTP stream from the desktop app on one port, 47800, inside your network. Cloud by DevLune relays the readings through Supabase Realtime, at most every 2 seconds. Tailscale is the same local stream over your own private network.
- One QR code
- The pairing QR carries the code, the mode, the PC's addresses and the port. The phone tries the addresses in order, Wi-Fi first and Tailscale last, and finds the PC again if the router hands it a new address.
- Only real readings
- If a PC does not report something, the row is hidden rather than filled with a guess. Estimated values were removed in 0.2.1.
- Now playing, kept local
- The Windows app reads what is playing from Windows media controls, shrinks the cover to a small JPEG and serves it on the local port behind the pairing code. Play, pause and skip come back the same way, rate limited, and never through the cloud.
- Checked language packs
- Both apps share one translation file per language. Downloaded translations are validated against the app's English before they are used, on the phone and on the PC. A line whose placeholders do not match is dropped, and the English shows in its place.
Tauri v2 · Rust · React · Kotlin · Jetpack Compose · Supabase Realtime
Privacy
Privacy, plainly
No account
A 6-character pairing code is the only thing linking phone and PC.
Read only, except media
The phone can see readings. In Local and Tailscale mode it can also play, pause and skip what your PC is playing, which you can switch off on the PC. It cannot change or run anything else.
Local stays local
Local mode keeps readings on your own network. It is not encrypted there, so use a network you trust, or Tailscale, which encrypts the link.
Cloud, said straight
Cloud by DevLune passes readings, and your phone's name, through DevLune's relay so the phone can reach the PC from anywhere.
Nothing extra
Running program names are not sent unless you switch that on. The camera is used only to scan the pairing QR code.
Questions
Questions people ask
- Is SysWatch free?
- Yes, on the phone and on the PC, with no ads and no account. If it earns a place on your desk, you can sponsor SysWatch on GitHub.
- Does it work away from home?
- Yes, in two of the three modes. Cloud by DevLune works from anywhere with internet and needs no setup. Tailscale is instant and private from anywhere, after about five minutes of setup. Local works on the same Wi-Fi.
- Which PCs are supported?
- Windows today: Windows 10 and Windows 11, 64-bit. The phone app needs Android 7.0 or newer.
- Why does Windows warn about the installer?
- The installer is not code signed yet, so Windows SmartScreen shows "Windows protected your PC". Choose More info, then Run anyway. The download and setup guide shows every step.
- Does it show CPU temperature?
- Yes, when your PC reports it. CPU and GPU temperature sit next to load, and NVIDIA graphics cards are read directly. SysWatch never shows a reading your PC does not send.
- What can the phone do to my PC?
- Almost nothing. The phone can see readings. In Local and Tailscale mode it can also play, pause and skip what your PC is playing, which you can switch off on the PC. It cannot change or run anything else.
More answers and the full setup help are on syswatch.devlune.in.
Crafted in the dark. Shipped to the world. By DevLune.