ok I am an iphone user and i just moved to the android ecosystem and something i really miss is itunes. you see if some thing happened to my iphone in terms of software glitches which could not be solved by simply shuting down the phone and then powering it back up, i simply connected it to itunes and i re-installed ios to the phone. i was wondering if there is a software for mac in which i can have the android os stored in case the software glitches and then reinstall it to the phone just like on itunes.