Not officially available yet / Not available.
This app only works on Nexus 7 (2012 & 2013), Nexus 4, Nexus 5, Nexus 6, OnePlus One, Sony Xperia Z (yuga), ZL(odin), Z1(honami), Z1 Compact (amami), Z Ultra(togari), Z2("sirius") and Z3, Motorola Moto G (1st gen) and HTC One M7 and M8, Samsung Galaxy S4 (i9505), ZTE V5 RedBull (X9180) and HTC One X.
This application requires root and it is designed to be used by experienced "power users".
It is strongly recommended to read XDA thread before installing this app, you can find links at the bottom of this description.
MultiROM Manager can install or update MultiROM, it's recovery and kernels. It can also install Ubuntu Touch system-image based builds into MultiROM as a secondary ROM.
MultiROM is one-of-a-kind multi-boot mod for Android devices. It can boot any Android ROM as well as other systems like Ubuntu Touch.
Besides booting from device's internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. The main part of MultiROM is a boot manager,
which appears every time your device starts and lets you choose ROM to boot. You can see how it looks on the left image below and in gallery. ROMs are installed and managed via modified TWRP recovery.
You can use standard ZIP files to install secondary Android ROMs, daily prebuilt image files to install Ubuntu Touch and MultiROM even has its own installer system, which can be used to ship other Linux-based systems.