What is a custom os?

[AC Question]

what is a custom os?

What is a custom osx on a samsung galaxy s5?

 

[Ian Morgan2]

Re: what is a custom os?

The following article should give some insight :-
5 Reasons to Install a Custom Android ROM (and Why You Might Not Want To)
Extract :-
Android is open source, so developers can take its code, add features, and build their own operating system images for Android phones and tablets. Many Android geeks install such custom ROMs — but why?

“ROM” stands for “read-only memory.” A custom ROM replaces your device’s Android operating system — normally stored in read-only memory — with a new version of the Android operating system. Custom ROMs are different from acquiring root access.

 

[B. Diddy]

Re: what is a custom os?

Welcome to Android Central! A custom ROM is a modified version of the base Android code that you can install on a rooted phone (as long as the ROM is designed for that phone). Custom ROMs may have radically different apperances, as well as novel features.