by Harshkit
Apple-style continuity between your Android phone and your Mac.
Calls, messages and notifications on your Mac. OTP codes copied for you. One clipboard across both.
Free, open source, end-to-end encrypted, and it never touches the internet.
Website · Install · Features · How it works · Security · Privacy
iPhone owners get Continuity for free: texts on the Mac, codes that paste themselves, copy on one device and paste on the other. If your phone is a Samsung, Pixel or any other Android, you don't. Kitbridge closes that gap: a small Android app and a Mac menu-bar app that talk directly to each other over your Wi-Fi, with no cloud, no account and no subscription.
On your Mac:
curl -fsSL https://raw.githubusercontent.com/harshkit/kitbridge/main/install.sh | bashIt installs the Mac app (menu bar, starts at login), then pairs your phone over Wi-Fi. On the phone you'll need Settings → Developer options → Wireless debugging → Pair device with pairing code once. The installer asks for the code shown there. After that, there's nothing to run: both sides connect on their own whenever they're on the same Wi-Fi.
Requirements: a Mac on macOS 14 or later, an Android phone on Android 13 or later, both on the same Wi-Fi network. Tested on a Samsung Galaxy S26 Ultra (Android 17) with a MacBook Air.
- 📞 Calls on your Mac. An iPhone-style call panel appears on the Mac with the caller's photo or initials: Accept, Decline, and during the call a live timer and End. Outgoing calls show Calling… until answered. Works with your phone's own calls (including Samsung's dialer) and WhatsApp calls. The call audio stays on your phone or its earbuds; macOS doesn't let other phones use the Mac's microphone and speakers for calls.
- ☎️ Call from your Mac. Call a Number… in the menu bar, or click any phone number on the Mac once Kitbridge handles phone links. You always confirm first, and your phone places the call.
- 🔋 Your phone in the menu bar. The Kitbridge menu shows your phone like a connected device: its name, battery level and charging.
- 💬 Messages and SMS. WhatsApp, Messages, Telegram and everything else your phone shows, as native macOS notifications with the sender's photo and the app's badge. Swipe one away on the phone and it disappears from the Mac.
- ↩️ Reply from your Mac. Hover a WhatsApp, SMS or Telegram alert, click Reply, type, send. The phone answers through the app's own reply button, so it's a real reply in the chat.
- 🔐 OTP auto-copy. When a verification code arrives, it's already on your Mac's clipboard: just press ⌘V. Works with bank SMS, Google, and "123 456"-style codes; ignores amounts like "₹1500".
- 📋 One clipboard. Copy text, links or images on either device and paste on the other. HDR photos from your phone paste in true colour, upright and full size. Passwords copied in password managers (on either side) are never sent.
- 📤 Send to Mac. Share any photo or text to Send to Mac, or tap the Send to Mac Quick Settings tile to send whatever you just copied.
- 🕘 History. Tap Calls, Messages or Clipboard in the phone app to see the last 20, copy a past clip again, delete one, or clear all. Kept only on the phone.
- 🎛️ You're in control. Turn each piece on or off from the phone: calls, messages, other apps, sending copies, receiving copies.
- ⚡ Fast. One persistent connection with no batching: in tests an OTP lands on the Mac clipboard in about 20 ms, and a round trip on home Wi-Fi measured 17 ms.
- 📶 Finds your Mac by itself. After a restart, a Wi-Fi change or a new address from your router, the phone asks the network "where's my Mac?" and reconnects in seconds, even on routers that block Bonjour. It also retries the moment Wi-Fi comes back or you unlock the phone. Still stuck? Tap Enter Mac code in the phone app and type the Connect code from the Mac's menu bar.
- 🔁 Seamless. The Mac app starts at login and relaunches itself if it ever crashes; the Android side runs as a system-managed notification listener, keeps its link while the phone is locked, reconnects in milliseconds to a known Mac and, after any drop, re-sends what you missed.
Android (Kotlin, no libraries) Mac (Swift, menu bar)
┌──────────────────────────────┐ same Wi-Fi ┌──────────────────────────────┐
│ NotificationListenerService │ TCP :47811 │ Bonjour _phonebridge._tcp │
│ SMS receiver (full OTP text) │ ◀─────────────▶ │ macOS notifications │
│ Clipboard watcher │ X25519 + AES │ OTP → clipboard │
│ Toggles, status │ -256-GCM │ Clipboard watcher │
└──────────────────────────────┘ └──────────────────────────────┘
Android deliberately makes a few of these things hard for apps. Here's what Kitbridge does about each, all with your consent over adb during setup:
| Android limit | What Kitbridge does |
|---|---|
| Apps can't read other apps' notifications | Uses the official notification access permission, granted by setup (sideloaded apps can't flip it on themselves on Android 13+). |
| Android 10+ blocks reading the clipboard in the background | The system logs Denying clipboard access to <app> whenever the clipboard changes. With READ_LOGS granted over adb, Kitbridge watches for that one line (filtered to ClipboardService), shows an invisible window for a few milliseconds to gain focus, reads the clip and closes. KDE Connect uses the same technique. |
| Android 15+ hides OTP text from notification listeners | Kitbridge reads the SMS itself (RECEIVE_SMS), so the full code reaches your Mac. |
| Samsung phones and many routers filter Wi-Fi multicast, hiding Bonjour | The phone sends a 4-byte "where's my Mac?" to the network (as a broadcast and to each address directly, bound to Wi-Fi rather than mobile data); the Mac answers with its address. Bonjour stays as a fallback, and the encrypted pairing still decides whether anything connects. |
| Battery savers drop background connections | Setup adds Kitbridge to the battery-optimisation allowlist; the Mac pings every 10 s and the phone re-sends anything missed after a reconnect. |
| Log access is granted only on screen (Android 13+) | After a reboot or update, Kitbridge shows a "Turn on copy to Mac" reminder; tap it, then Allow. The Send to Mac tile and share option never need it. |
| HDR photos look washed out on a Mac clipboard | The Mac converts them with Apple's ImageIO to a standard-range PNG (keeping the colour profile and rotation) and also keeps the original. |
Permissions the Android app uses: notification access, RECEIVE_SMS, CALL_PHONE and ANSWER_PHONE_CALLS (place, answer, decline and end calls you trigger from the Mac), READ_PHONE_STATE (to tell when a call is ringing), READ_LOGS (fallback copy detection, granted over adb), SYSTEM_ALERT_WINDOW (lets the invisible clipboard reader open from the background), POST_NOTIFICATIONS (the setup reminder), QUERY_ALL_PACKAGES (to show app names on the Mac), INTERNET and Wi-Fi state (local network only).
Payment and banking apps keep working. Kitbridge uses no Accessibility service, which is what UPI and banking apps (GPay, PhonePe, Paytm, banks) block. Some banking apps also refuse to open while Developer options or Wireless debugging is on: after setup you can switch Wireless debugging off; Kitbridge doesn't need it day to day.
- End-to-end encrypted, no server. Your phone talks only to your Mac. Every connection runs a fresh X25519 key exchange, authenticated by a 256-bit key that's created on your Mac and handed to your phone once over adb. Messages are sealed with AES-256-GCM and carry strict sequence numbers, so nothing on your network can read, alter or replay them. Old sessions stay sealed even if the pairing key leaks later (forward secrecy).
- Locked pairing. Only
adb(your computer, with your consent) can pair the app; other apps on the phone can't re-pair it to themselves. - No telemetry, no account, no internet. See PRIVACY.md.
- Tested against attacks.
mac/test/run.shruns a fake phone against the real Mac app: it checks the handshake, OTP copy and clipboard, then tries a replayed message, a wrong key and an old-session message (all rejected), and captures the traffic to prove no content crosses the wire readable.
What it doesn't protect against, and the exact design, is in SECURITY.md.
git clone https://github.com/harshkit/kitbridge && cd kitbridge
./mac/build.sh # builds and installs the Mac app (needs Xcode Command Line Tools)
./setup.sh # builds the Android app and pairs your phone (needs JDK 17 + Android SDK)
./mac/test/run.sh # security tests against the running Mac appInstall the Android build tools with brew install openjdk@17 && brew install --cask android-commandlinetools android-platform-tools, then set ANDROID_HOME to the SDK folder.
| Path | What |
|---|---|
android/app/src/main/java/com/harshkit/kitbridge/Bridge.kt |
Link, encryption, notification listener, SMS, clipboard |
android/app/src/main/java/com/harshkit/kitbridge/Ui.kt |
The phone app's screen |
mac/main.swift |
The whole Mac app |
install.sh, setup.sh, mac/install-app.sh |
Installer, phone setup, Mac install |
mac/test/ |
Fake-phone attack tests and wire sniffer |
icon/ |
Icon master (icon.svg) and the script that renders every platform size |
- Drop files between phone and Mac (AirDrop-style)
- Answer or decline calls from the Mac
- One-click hotspot from the Mac menu bar
Ideas and bug reports are welcome in Issues.
MIT © 2026 Harsh Sharma · Harshkit. Not affiliated with Apple, Google or Samsung.