Facebook takes center-stage with "Home" on Android.

Facebook Home for Android: It isn't a phone, it isn't an operating system, and it isn't a rebuilt version of Google's Android OS. What it is, technically anyway, is a collection of apps acting as one organism to deliver a full-skin Facebook experience for your Android phone, putting your Facebook contacts' photos, status updates, and chat icons front and center.

Turning your Android phone into an in-your-face Facebook portal is an odd experiment for the social networking titan, but one that's also logical. Facebook doesn't create hardware, and its social sharing and chatting is its heart. For die-hard fans, an all-out Facebook experience like Home really is the best way to keep a finger on the pulse of friends' social activity.
It's an incredibly niche audience, to be sure, and after seeing Facebook Home in action, I have more questions than answers about how the experience would benefit, rather than hinder, the majority of users.

No more home screens
Facebook Home supplants your traditional home screens with a seemingly endless stream of photos from your news feed. Called "Cover Feed," it offers up a full-screen background image and overlays messages, icons, notifications, and other text on top. The photos auto scroll, or you can flick to advance. Since this is still an Android phone, Facebook Home will surface notifications from Facebook, as well as for third-party apps, like e-mail, missed calls, and texts.

Chat Heads: A new kind of messaging
Messaging is a major part of Facebook Home, and it's represented by circular icons of your friend's profile picture that float above the Cover Feed image on the screen. Facebook calls them Chat Heads. This would not be my first choice for a feature name; it only makes me think of a kid's game involving foam toys, or maybe some sour candy.
Regardless, you tap the Chat Head icon to engage in conversations, and tap again to close them. Flicking them away, either one at a time or in a whole stack, is an easy enough way to dispatch of them.

Who's it for, and is it any good?
For someone who's used to the more traditional, apps-focused layout, Facebook Home feels a little disorienting and intrusive -- indeed, like it's an app you should exit to see other phone functions, rather than being the main event itself. To be fair, that's exactly what it's meant to be.
There's a bit of a learning curve to use it, and I don't just mean the onscreen controls to navigate around. More essentially, Facebook wants you to relearn how to use your phone, to engage with Facebook friends first before checking your e-mail, and to consider your phone a primarily social device.
And with that, Facebook surely hopes, you'll begin to use its services more than you use generic Android functions.
That said, since the Facebook experience does overtake your device, I have a hard time seeing anyone other than a supremely engaged Facebook user (read: fanatic) wanting to wallpaper the phone with Facebook's goods.

Installation and availability
Unless Facebook Home comes preinstalled on your phone, as with the HTC First and other future devices, you'll download it as an app through Android's Google Play store -- starting April 12. You can launch it once or twice to get a feel for it, or let it take over completely. As an app, you'll also be able to disable it and tweak certain settings and permissions.
However, there is a catch. To get all elements working in concert, you'll also have to download apps like Facebook (of course) and Facebook Chat. With the preloaded version, you get it all out of the box.
There are seven compatible phones right now. In addition to the HTC First, Facebook Home will work on the HTC One, One X, and One X+, and the Samsung Galaxy S3, Galaxy S4, and Galaxy Note 2. You can be sure it'll be compatible on more handsets in the future, smartphones and tablets alike.cnet