Have you heard of Status?
„Status is an open source messaging platform and mobile interface to interact with decentralized applications that run on the Ethereum Network.” (quoted form https://status.im/whitepaper.pdf 11.June.2017 17:40 MESZ)
If you want to get more information on it, fell free to check out my FAQ (https://steemit.com/cryptocurrency/@newnils/what-is-status-faq) out or check out the website of (https://status.im) .
If you want to watch a video - here is one: