Each device will create a separate and unique Abra wallet. Within that Abra wallet, you can invest in multiple cryptocurrencies, send and receive bitcoin, litecoin and over 50 fiat currencies. Each Abra wallet can hold multiple currency wallets under the "my portfolio" view.
Each Abra wallet that is set up (either on the same device or on a separate one) will have its own recovery phrase.
We do not recommend using the same Abra wallet on multiple devices.