What technologies are used in AirBeam-Share?

AirBeam-Share is built with Jetpack Compose, Android, Camera API, Data Encoding, Room Database.

What are the key features of AirBeam-Share?

AirBeam-Share highlights include: Air-gapped 100% offline file transfer; Animated QR code stream encoder; Local Room Database history.

Is AirBeam-Share open source?

Yes, the source code for AirBeam-Share is hosted on GitHub at https://github.com/Ankit628792/AirBeam-Share.

AirBeam-Share — Mobile App Case Study

CHAPTER 01

What is AirBeam-Share?

ARCHITECTURE OVERVIEW

AirBeam-Share is an off-grid, optical file transfer application that moves sensitive documents, photos, and notes between two nearby devices using nothing more than pulses of visible light.

One screen flashes a dynamic, high-density stream of optical QR patterns, and the camera lens on the second device scans it. In seconds, the file is assembled and saved directly to the device—with zero Wi-Fi, zero Bluetooth, and zero internet connection.

CHAPTER 02

The Problem It Solves

PROBLEM & CONTEXT

The Invisible Risks of Wireless Sharing

Today, sending even a tiny document across a room usually requires radio waves:

Discoverable Radio Signals: Wi-Fi and Bluetooth broadcast signals that can be detected, logged, or intercepted by nearby network scanners.
Unreliable in Remote Areas: Basements, underground tunnels, flights, boats at sea, and disaster zones often have zero signal and no routers.
Cloud Dependence: Many wireless sharing tools secretly send files through a remote cloud server before delivering them to someone sitting right across the table.
Complex Pairing Frustrations: "Why isn't my phone seeing your device?" and "Are we on the same Wi-Fi?" are questions we've all asked.

The Breakthrough Moment

Human eyes don't need a Wi-Fi password or a network handshake to read a book across a table.

If human beings can share ideas simply by looking at ink on paper, why can't our phones exchange data the same way? By turning digital files into high-speed optical patterns on a screen, devices can communicate through pure light.

CHAPTER 03

How It Works (Step by Step)

STEP-BY-STEP WORKFLOW

AirBeam-Share is completely air-gapped and requires no accounts, phone numbers, or passwords:

Step 1: Select Your File (The Sender)

Pick a document, photo, or note. You can adjust the light pulse speed to match room brightness, or add an optional verbal password.

Step 2: Cast the Light Beam

With a tap, your phone screen becomes a visual beacon, flashing high-contrast, animated optical blocks that represent the file.

Step 3: Catch the Light (The Receiver)

The recipient opens AirBeam-Share and points their camera lens at the sender's screen. No Bluetooth discovery, no pairing pins. A live puzzle grid on the receiver's screen fills up in real time as each optical block is captured.

Step 4: Instant Confirmation & Local Save

A friendly haptic vibration confirms the transfer is 100% complete and verified. The file is saved directly into the phone's private storage. It never touches a cloud server.

CHAPTER 04

Key Highlights

CAPABILITIES

100% Air-Gapped & Zero Radio Waves: Works flawlessly in Airplane Mode with Wi-Fi and Bluetooth turned off.
Visible Transparency: You can literally watch the data move. If you cover the screen or point the camera away, the transfer stops immediately.
Zero Intermediaries: No cloud accounts, no phone numbers, no tracking cookies, and no network logs.
Local Room Database: Encrypted local history stored safely on your device.

CHAPTER 05

Real-World Impact

OUTCOMES & IMPACT

Investigative Journalists & Sources: Exchange critical documents in public spaces without leaving digital footprints on public Wi-Fi.
Field Workers & Disaster Relief: Move mission-critical maps, medical records, and supply lists where cell towers are completely down.
Everyday Privacy: Hand a PDF or photo to a friend without surrendering your contact list or syncing to remote cloud storage.

PRODUCTS.

AirBeam-Share.

KEY HIGHLIGHTS AT A GLANCE