Take over control before loading the Operating system.
EFIDroid attempts to make it easy for both users and developers to control their boot experience.
Install and boot any number of operating systems and recovery tools.
Change the boot behavior without modifying ROM's. Swapping internal/external memory, overclocking or modifying the ramdisk. Live and without any permanent modifications.
EFIDroid uses UEFI in the background which means that you can boot other bootloaders like GRUB or rEFInd and even small games :)