OffBridge

Entropic Software Lab

এই এপ্‌টোৰ বিষয়ে

Off Bridge moves your clipboard and your files between Android and Windows — directly, with no cloud in the middle.

Copy on your phone, paste on your PC. Send a file across the room without uploading it to anyone's server. It goes straight between your own paired devices, over your own network or over no network at all.

NO CLOUD. NO ACCOUNT. NO TELEMETRY.
There are no servers behind Off Bridge. Nothing to sign in to, nothing collected. Your clipboard and your files stay on your devices.

WORKS WITHOUT INTERNET
Off Bridge takes the fastest link your devices have, and steps down when there isn't one:
• LAN — same Wi-Fi, the fast path
• Wi-Fi Direct / hotspot — no router needed
• QR code — show a code, scan it, connected
• NFC tap — bump two phones to start an off-grid transfer (Android)
• Bluetooth control channel — sets up the link when nothing else can

SECURITY
• Pairing runs an ECDH key exchange and shows a 6-digit code on both screens. Confirm the numbers match and nobody can sit in the middle.
• Over your network, every clipboard item and every file is sealed with authenticated AES-256-GCM before it leaves the device. Tampering is detected, not just hidden.
• An off-grid QR or NFC link is a direct connection between the two devices you paired, gated by that same authenticated handshake.
• Anti-downgrade: once a device has proved it supports encryption, Off Bridge will not quietly fall back to plaintext.
• Keys live in the Android keystore, tied to your hardware. Unpair and they are gone.

DAY TO DAY
• Send one file or a batch, with live progress and cancel
• Transfer history you can filter
• Quick-settings tile and share-sheet support — push to your PC without opening the app
• Light and dark themes, a simplified layout by default, and the full control panel one tap away
• 10 languages

WINDOWS COMPANION
A free desktop app (Windows 10/11, 64-bit) pairs with the phone for clipboard sync and file transfer in both directions.

PERMISSIONS, AND WHY
• Network / Wi-Fi / nearby devices — find and connect to your other device
• Camera — scan pairing QR codes
• NFC — tap-to-transfer
• Notifications and foreground service — keep the link alive and show transfer progress
• Battery-optimization exemption (optional) — stop Android from killing background sync

Off Bridge is for people who would rather not hand their clipboard and their files to a cloud service just to move them three feet.

নতুন কি আছে

Fixed Visual Bugs and off-grid transfer bug