Take a look at TMA Post desktop application:
https://github.com/tmacoin/tmapost. It is running on top of the TMA blockchain. For a limited time here is a web-based version of it:
https://tma.tmacoin.net/ with a smaller set of features. The web-based version will be removed as soon as smart phone applications created.
Will it be on both android and iOS? And when will we get a roadmap for the actual tma