Bitcoin was created in 2008 and is the first decentralized digital currency. Together with the creation of bitcoin came the birth of the blockchain - the public ledger that lists all transactions ever made on the bitcoin network.
New coins called "block rewards" are created when miners solve a complex mathematical problem. Each block contains the transactions that have been validated, as well as information about the previous block. This sequence of events ensures that transactions on the bitcoin network cannot be successfully forged.
It takes approximately 10 minutes for a block to be confirmed on the Bitcoin network. Fees are calculated according to the transaction's data size and paid in bitcoin.
You can switch between currencies from the Home screen, which is accessible by the back arrow found on the top left of any currency screen.