QuickShare: Transfer, No Ads

QuickShare is a LAN file transfer app with zero ads and zero mobile data. Android, iOS, Windows and macOS — phone to PC, PC to phone, Android to iPhone. No cables, no data usage, no size limit, no quality loss. Files move directly between your devices, never through a server.

⚡ Zero Mobile Data, Full Bandwidth
Everything runs over your local network: not a single byte of mobile data is used, and nothing is relayed through a server, so speed depends only on your router. A 1GB video finishes in seconds. No throttling.

🖥️ Four Platforms: Android, iOS, Windows, macOS
Android to iPhone, iPhone to Android, phone to PC, PC to phone, Windows to Mac — any two devices can exchange files directly, regardless of OS. One interface everywhere: your phone, your work PC, your Mac, your friend's Android. No cloud drive to install on each platform.

🚫 No Ads. Ever.
No splash ads, no interstitials, no recommendation feed, no "watch an ad to unlock speed". QuickShare is ad-free, period. Transfers run entirely on your LAN and use no mobile data — move huge files even when your data plan is nearly gone or you're in airplane mode with Wi-Fi on. Works with the internet off, as long as your LAN is up.

📂 Send Anything, No Compression, No Size Limit
Photos, videos, music, documents, archives, whole folders — all formats supported. No ads, no compression, no re-encoding, no per-file size cap: what arrives is exactly what you sent. Select multiple files or entire folders at once.

🔒 Encrypted Transfer with PIN Confirmation
Transfers are protected by TLS with RSA 2048 self-signed certificates, and device identity is verified by SHA-256 certificate fingerprint under a TOFU (Trust On First Use) model. Each transfer generates a 6-digit PIN valid for 5 minutes, compared in constant time to resist timing attacks; five failures in a row trigger an exponential lockout.

📁 Received File Manager
A built-in list of everything you've received, newest first, filterable by images, videos, audio, documents and archives. Open or share straight from the list.

🕓 Device History
Recently connected devices are saved for one-tap reconnect — no rescanning.

🔍 Dual Device Discovery
UDP multicast and HTTP active scanning run in parallel to find devices on your LAN. A radar animation shows progress in real time.

How to Send:

1. Connect both devices to the same Wi-Fi and open QuickShare.
2. Tap "Send" and pick the target device once the radar scan finishes.
3. Select files or folders, then tap "Send".

How to Receive:

1. Connect to the same Wi-Fi as the sender, open QuickShare, tap "Receive".
2. A request appears showing the sender and the file list.
3. Files stream to local storage with real-time progress, then appear under "Received Files".

Use Cases:

- Back up phone photos and videos to your PC without a USB cable
- Move photos between Android and iPhone without setting up a cloud drive
- Move large files from PC to phone for offline viewing
- Share footage between Windows and Mac in a mixed-OS office
- Share meeting materials — no hotspot, no mobile data
- When your data plan is nearly used up or the signal is bad
- Hotels and meeting rooms with a LAN but no internet
- A cross-platform alternative

Privacy & Security:

- Transfers never touch the cloud. Data stays on your LAN.
- Received files stream to disk with size verification.
- All incoming data is strictly validated.
- Permissions are used for file transfer only.

Supported Platforms:
Android, iOS, macOS and Windows. Phones, tablets and computers — any two devices, any combination.

Feedback:
Issues or feature requests? Submit them in email cassiezhao11@gmail.com.