Firechat is a connectivity application that enables users to share messages and photos even without internet. It uses the same technology as Bluetooth and Airdrop with a requirement of 30 feet distance from each device.
This is not only a social app but can also save thousands of lives. It is very helpful in times of calamities and disasters as rescue missions will be executed smoothly with the use of this application.
This app is not yet available in Android but you can have in Apps Store, This could give benefits for more users and for sure FireChat will very useful for those who wanted to get in touch with their love ones all day long.
See this for Ios version of FireChat Free