Morse Code - Decode & Chat

Asynk Tech

About this app

Decode, send, and learn morse code — all with your phone's camera and flashlight. No internet required.

The only morse code app that combines real-time light decoding, flashlight transmission, and two-way chat.

▶ DECODE WITH YOUR CAMERA
Point your camera at any flashing light. The app samples brightness in real-time and translates the flashes into text. Adjustable threshold, zoom up to 10x, and exposure controls let you read a signal across a room, across a field, or in full darkness.

▶ SEND WITH YOUR FLASHLIGHT
Type a message and transmit it via flashlight or screen flash. 4 speed presets from 6 to 24 WPM. 24 quick-tap presets for emergency, status, navigation, and common phrases including SOS, Need Help, and I Am Safe.

▶ CHAT USING LIGHT
Two-way real-time conversation. One phone flashes, the other decodes. Messages appear in a chat interface with timestamps. Audio morse via speaker and microphone is supported too, for when line of sight isn't available.

▶ LEARN MORSE CODE
Practice with interactive quizzes in two directions: identify the code for a character, or the character from a code. Track accuracy, build streaks, and master every letter and number. Supports both international and Russian (Cyrillic) morse code.

▶ REFERENCE GUIDE
Complete morse code chart with letters A–Z, numbers 0–9, punctuation, timing rules, and an SOS reference.

Morse code numbers are always five symbols:
1 = ·–––– 2 = ··––– 3 = ···–– 4 = ····– 5 = ·····
6 = –···· 7 = ––··· 8 = –––·· 9 = ––––· 0 = –––––

The SOS distress signal is ··· ––– ··· — three short, three long, three short.

▶ BINARY PROTOCOL
Advanced error-corrected communication. Manchester encoding with CRC-8 checksums for reliable transfer even in noisy conditions. The app auto-detects whether an incoming signal is standard morse or a binary packet.

▶ SAFETY
Photosensitive epilepsy warning on every launch. Screen-only safe mode. Flash frequency is hardware-limited.

WHEN THIS IS USEFUL
★ When the internet is down, blocked, or unavailable
★ Hiking, in the mountains, and at sea
★ Emergencies and signalling for help
★ Anywhere with no cellular coverage
★ Learning morse code
★ Just as a genuinely interesting experiment

KEY FEATURES
★ Real-time camera-based morse decoding
★ Flashlight and screen transmission
★ Two-way light chat between phones
★ Audio morse via speaker and microphone
★ 4 speed presets (6–24 WPM)
★ 24 quick-tap message presets
★ Interactive learning with scoring
★ Latin and Cyrillic morse code
★ Error-corrected binary protocol
★ Works completely offline — no internet, no SIM, no account
★ No ads, no data collection

Light instead of signal. Works even in aeroplane mode.