Smoke is one of the earliest technologies for long distance visual communication. This iPhone addon offers you the advantages of ancient technology TODAY! Features: free, no subscription, autonomous, not dependant on existing infrastructure, location based long distance visual communication, nsa proof protocol social: one has to agree on a protocol in person in order to start communication, chaining to cover longdistances (chinese 750km, great wall) legacy encryption: Polybius square encryption (150 BC)