Offline Light Signal Communicator

Communicate with Light. No Network Needed.

Transmit messages via flashlight pulses and instantly decode incoming light signals in real-time using your camera. Fully secure, offline-first Morse transceiver.

Get it on Google Play

Scan to install on your phone

Flash Morse UI Screenshot

Simulated Light-Signal Transfer

Type a word and watch Phone A transmit it using flashing light pulses, while Phone B decodes it in real-time.

Sender Mode
Active Morse Translation
.... . .-.. .-.. ---
Receiver Mode
[CAMERA PREVIEW] - SIGNAL LOW
ALIGN
Decoded Output
---
[System]: Receiver Online
[System]: Waiting for light signal...
*Web Audio API tone generator

Engineered for Silent Communication

Designed as a high-fidelity utility app, Flash Morse gives you full capability to communicate without cellular towers or internet data.

Real-time Camera Decoding

Real-time Camera Decoding

Uses your phone's camera stream to automatically analyze light fluctuations and decode flash pulses into characters instantly, completely offline.

High-power Flash Transmission

High-power Flash Transmission

Pulse your device camera LED flash in precise Morse intervals. Broadcast text messages across visual distances clearly and reliably.

Voice-to-Morse Input

Voice-to-Morse Input

Dictate messages directly via speech recognition. Your words are instantly transcribed and ready to flash without typing, processed locally.

Speed Calibration Sliders

Speed Calibration Sliders

Adjust Morse signal speeds from 0.5x to 3.0x to calibrate and match ambient environments, visual distances, or receiver capabilities.

Built-in Morse Guide

Built-in Morse Guide

Includes an offline dictionary cheat-sheet. Study codes, read signals, and master the Morse alphabet anywhere, anytime.

Offline & Secure Operation

Offline & Secure Operation

Keep track of transmissions locally with 100% on-device processing. No cellular data, internet, or third-party servers required.

Trusted by Outdoor Enthusiasts

See how Flash Morse helps users communicate silently, learn Morse code, and send signals in remote locations.

4.8Google Play Rating
10k+Active Downloads
100%Offline & Secure
"The brightness analysis is incredibly responsive! I tested it with two phones across the yard at night, and it translated full sentences perfectly without any glitch. Very useful for outdoor hiking emergencies."
Marcus VanceOutdoor Enthusiast & Hiker
"As an amateur radio hobbyist, I love the implementation. Having the dictionary built-in offline alongside the transmitter/receiver makes this the perfect companion tool. Clean design and very fast."
Clara ReynoldsHAM Radio Operator
"Works perfectly. The voice dictation makes transmitting so much easier. Since it runs completely locally on the device, I don't have to worry about my messages being stored on some remote server."
David ChenPrivacy Advocate & Developer
Shreyas Damase
About the Creator

Shreyas Damase

Mobile & Android Developer

I am an Android developer passionate about building utilities that run entirely on-device. I believe that technology should be accessible, private, and capable of operating independently of large-scale cloud infrastructure.

Why I Created Flash Morse

Modern communication is built on complex infrastructure. We rely on cell towers, satellites, global fiber networks, and cloud databases just to send a simple text message. But what happens when you go off the grid, experience a power outage, or find yourself in an emergency where networks fail?

I realized the hardware already in our pockets is capable of bridging these gaps independently. Almost every smartphone is equipped with a high-intensity LED flashlight and a high-frequency camera sensor. By coding a system that bridges the physical space with light, we can turn any device into a self-sufficient transmitter and receiver.

“Flash Morse was born from a simple question: How do we communicate when the grid goes down?”

I built Flash Morse to turn this concept into an accessible, practical tool. The app requires zero internet access, zero account creation, and zero trackers. It is an open, private utility designed to translate, transmit, and decode line-of-sight light signals in real-time. Whether it's for emergency survival, education, or absolute communication privacy, I hope this tool serves as a reliable utility when you need it most.

Interactive Morse Alphabet

Tap any letter or number below to play its real-time audio sequence. Dots (•) represent short signals, and dashes (–) represent long signals.

Click card to hear sound code