I would like to use the attiny84 with the nRF8001, for a phone application;

[FJ]

I am also reading 4 analog inputs. What libraries can I use for serial communication?

[run_ar]

Take a look at ble_sdk_arduino. You can find more information about pin configuration in the readme files in the SDK. 5 pins are required for ACI communication 4 SPI pins + one additionl PIN for handshaking.