RemoteKM — turn your phone into a wireless mouse & keyboard

RemoteKm lets you control your Windows PC from your Android phone over your home Wi-Fi. Use your phone as a trackpad and a full keyboard — no cables, no internet, no account.

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What you need

• A Windows 10/11 PC (the thing you want to control).
• An Android 8.0+ phone.
• Both on the same Wi-Fi / network.

Get the two apps

Tip

Get the already built apps from release page

RemoteKm comes as two parts: a small PC app and a phone app.

PC app (single file):

dotnet publish RemoteKm.Host -c Release

This creates one file — RemoteKm.Host.exe (under RemoteKm.Host\bin\Release\net10.0-windows\win-x64\publish\). Copy it anywhere and run it; it lives in the system tray (next to the clock). Nothing else needs to be installed.

Phone app (single file):

dotnet publish RemoteKm.Client -f net10.0-android -c Release

Install the file named RemoteKm.apk (under RemoteKm.Client\bin\Release\net10.0-android\). Copy it to your phone and tap to install (you may need to allow "install from unknown sources").

Install the right file. The build folder also contains com.remotekm.client.apk, which is unsigned and will fail to install ("App not installed"). Always use RemoteKm.apk (the signed one). If you previously installed an older RemoteKm build, uninstall it first — this version is signed with a new, stable key, so it won't install on top of a differently signed copy. After this one, future updates install over each other normally.

One-time PC setup (important)

The first time, run this once in an Administrator PowerShell so the PC can accept connections:

netsh http add urlacl url=http://+:45455/ user=Everyone

And allow it through the firewall (also as Administrator, only if needed):

New-NetFirewallRule -DisplayName "RemoteKm UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 45454
New-NetFirewallRule -DisplayName "RemoteKm TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 45455

If you skip the first command, the PC app will pop up a reminder with the exact line to run. (As an alternative, you can just run the PC app as Administrator.)

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How to connect

1. Start the PC app — a tray icon appears.
2. Open the phone app. It automatically lists PCs it finds on your network.
3. Tap your PC. (Or type its IP and port by hand, or tap Scan QR and point it at the code from the tray icon's Show QR code.)
4. The PC shows a one-time "Allow this device?" prompt — click Accept. Your phone is now remembered, so next time it connects instantly.

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What it can do

Trackpad

• Move the cursor by dragging one finger.
• Tap to left-click; tap with two fingers to right-click.
• Drag with two fingers to scroll (direction can be reversed in PC settings).
• Press-and-hold, then drag, to click-and-drag (move windows, select text).
• Dedicated Left / Middle / Right buttons and a pointer-speed slider.

Keyboard

• Works like a real keyboard: hold a key to repeat it, hold Alt and tap Tab to switch apps, and press several keys at once (multi-touch).
• Keys show your PC's language — e.g. Slovak shows ľ and 2 on the same key. When you hold Shift, the character that will be typed is highlighted.
• Separate Caps Lock, and a laptop-style Fn button: with Fn on, F1–F12 become media and navigation keys, and the arrows become Home / End / Page Up / Page Down.
• Dedicated Insert and Delete keys.
• Built-in media controls: Previous / Play-Pause / Next and Volume Down / Up / Mute.
• If you change your PC's input language (Alt+Shift) while connected, the on-screen keyboard updates automatically.

Connecting & convenience

• Automatic discovery of PCs on the network, manual IP/port entry, or QR-code connect.
• Trusted devices are remembered; pair once, connect instantly after.
• Runs landscape and full-screen; the side menu collapses to give the trackpad and keyboard the whole screen.

Status & info (phone)

• Live connection latency, uptime, and data sent/received.
• Export logs to share a diagnostic file if something goes wrong.
• Disconnect button.

On the PC (tray icon menu)

• See how many phones are connected.
• Connected clients window — disconnect any device.
• Trusted devices window — revoke a device's access.
• Show QR code, Disconnect all, Settings, Exit.

PC settings

• Shows the address it's listening on.
• Change the control port.
• Auto-start with Windows.
• Require approval for new devices (on by default).
• Reverse scroll direction.
• Open logs folder.
• Remove all data & settings (wipes saved settings, trusted devices and logs, and removes the auto-start entry) — with a confirmation prompt.

Safety

• A new device must be approved on the PC before it can do anything.
• If a key ever gets stuck down for more than 15 seconds, the PC releases it automatically and warns you.
• If a phone drops off the network, the PC notices and clears it from the connected list.

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Troubleshooting

• Phone can't find the PC: make sure both are on the same Wi-Fi, the PC app is running, and the firewall rules above are added. Some routers block device-to-device traffic ("AP/client isolation") — turn that off, or connect by IP / QR code.
• It finds the PC but won't connect: run the one-time netsh …urlacl… command above (or run the PC app as Administrator).
• "App not installed": make sure you're installing RemoteKm.apk (not com.remotekm.client.apk, which is unsigned), and uninstall any older RemoteKm build first.
• Camera won't scan: allow the camera permission when the phone asks.
• Something's wrong: grab the logs — PC: Settings → Open logs folder; phone: Status → Export logs — they record what happened.

Good to know / limits

• Works on your local network only — there's no internet relay, and traffic isn't encrypted, so use it on networks you trust.
• The keyboard's printed characters are tuned for Slovak/Czech and US English; other languages fall back to a US layout, but what you type is still correct.
• It can't control Task Manager or other elevated (Administrator) windows. When such a window is in the foreground — Task Manager, a UAC prompt, or any app run "as administrator" — Windows blocks input from a normal program, so the mouse and keyboard won't reach it. To use RemoteKm with those, run the PC app as Administrator too.

Adding a keyboard layout (for builders)

Keyboard layouts live as small JSON files embedded in the phone app (RemoteKm.Client/Resources/Layouts/<language>.json, e.g. sk.json, en.json). To add a language, copy en.json, rename it to the two-letter language code, fill in the characters each key produces, add it to the project as an EmbeddedResource, and rebuild the app. The unshifted/shifted characters are "n"/"s"; the "vk" is the key it sits on. Letters follow the layout family (QWERTY/QWERTZ/AZERTY) automatically, so the JSON only describes the top number row and the punctuation keys.

Licenses & credits

• Icons by Axialis — https://www.axialis.com

Third-party NuGet packages and their licenses:

Package	License
Microsoft.Maui.*	MIT
Microsoft.Extensions.DependencyInjection	MIT
Microsoft.Extensions.Logging.Debug	MIT
System.Text.Json	MIT
CommunityToolkit.Maui	MIT
CommunityToolkit.Mvvm	MIT
FluentIcons.Maui / FluentIcons.Common	MIT
Fluent UI System Icons	MIT
Camera.MAUI	MIT
Camera.MAUI.ZXing	MIT
ZXing.Net (via Camera.MAUI.ZXing)	Apache-2.0
QRCoder	MIT

The full license conditions (the MIT permission notice with copyrights, and the Apache-2.0 notice) are shown inside the apps: the PC app under Settings → About & licenses, and the phone app under Status → Licenses.