What is Mobilecoin? (MOB)
Mobilecoin is the cryptocurrency used with Signal messenger for sending and receiving private transactions from within the messenger app. However, it has stirred up some controversy as it's pre-mined, no one had heard of it and there are other more well know options like Bitcoin (on the lightning network) and Monero.
Mobilecoin was made by Moxie, the lead developer for Signal messenger, and has used complex cryptography to secure the money. The official wallet is available for macOS at https://mobilecoin.com/.
The feature, if you can call it that, was first introduced in early April to U.K. users only, but is now available in other countries including Switzerland.
AMA from Mobilecoin's CEO https://news.ycombinator.com/item?id=26726246