The Apple iPad 2 is no doubt the best-selling tablet--but does that mean it's the best tablet?
To find out, I spent a few weeks testing some of the iPad's leading competitors. I learned that in a surprising number of areas, including navigation, e-mail handling, and Web browsing, the other tablets actually beat out the iPad.
For this comparison, I set aside raw hardware specs. Processor speed, RAM, and ports certainly matter, but a tablet can have great specs and still be awkward and unpleasant to use. What makes or breaks a tablet is its operating system, which determines whether answering e-mail, watching video, and surfing the Web will be a pleasure or a frustration.
Several tablet operating systems are poised to battle it out. While most tablet OSs come on only one brand of tablet each, Google's Android 3.0 is the choice of a growing number of manufacturers, some of which add their own custom interface as HTC does with Sense UI and Samsung does with TouchWiz.
For this article I tried the iOS 4.3-based Apple iPad 2, the BlackBerry Tablet OS-based RIM BlackBerry PlayBook, and the Android 3.0-based Acer Iconia Tab A500, Motorola Xoom, and T-Mobile G-Slate. I didn't have a final version of the WebOS-based HP TouchPad (due out this summer) for unlimited testing, but I was able to spend some time with a preproduction unit.
Advantage: BlackBerry Tablet OS, Android 3.0
You'll go to your tablet's home screen again and again, so it's critical for the screen to look good and work efficiently.
The elegantly simple BlackBerry Tablet OS home screen smoothly transitions as you swipe among open apps in the navigator pane that appears in the upper two-thirds of the screen. RIM has built gesture navigation into the bezel, so a simple swipe up reveals context-sensitive menus, while a swipe down reveals the full app screen. The navigator screen and gesture-swipe combo makes moving among open, multitasking apps particularly intuitive. BlackBerry's home screen also deserves props for allowing one-tap access to Bluetooth, Wi-Fi, battery, and general-settings info. The BlackBerry's notifications are subtle: Messages appear in the upper-right corner to tell you that the battery is running low, for instance.
Android 3.0's home screens (you get six of them) are very different from the BlackBerry offering, but perfect for people who want detailed control over how their tools are organized and presented. The new home-screen design is cleaner than that of previous Android versions, and it makes moving app icons and widgets across the six screens easy. Widgets are a compelling addition to Android, too: Google and app developers can use them to put regularly refreshed information--such as your calendar, your most recent e-mail messages, or the latest weather--directly on your screen. Tap the widget, and you'll proceed directly to the related app itself. These shortcuts are finger friendly, but the frequently winking updates could become more clutter than convenience.
The three core Android 3.0 navigation buttons (back, home, and recently accessed apps) appear at the lower left of the screen, while the status bar is situated at the lower right. Both sets of buttons are built into the display, and will rotate accordingly as you turn the tablet from horizontal to vertical.
Oddly, the back button doesn't behave as you might expect: Nowhere does Android note that using the back button exits an app entirely, but that's the action it performs. The button for recently accessed apps, often erroneously referred to as the multitasking button, brings up thumbnails of the five apps you've used most recently; but even though this is intended as a shortcut, it can make your finger travel more, not less, to return to an app.
I especially like the redesigned notifications, which you reveal with the tap of a finger. The Android status bar is where you'll see notifications pop up, and where you'll get easier access to oft-used settings such as airplane mode and Wi-Fi.
The Apple iOS home screen is way behind the competition in many respects. It's staid and consistent, but not at all dynamic. The bottom area has room for a maximum of six docked apps, while the rest of your apps spread across one of the multiple (up to 11) home screens. App icons are static, and unlike Android 3.0, iOS doesn't allow for widgets. iOS has no set location for notifications, either; instead, it passes along alerts in intrusive pop-up boxes. Organizing apps on different screens or into folders is tiresome, whether you're trying to do so on the iPad itself or in the iTunes desktop software. And unlike other mobile OSs, iOS buries oft-used settings under the layers of the settings menu; you'll find no shortcut here.
Like HP's WebOS phones, the TouchPad has a home screen that uses what HP calls "activity cards." Each card represents an application, media file, e-mail message, or browser window. Cards can sit individually or in a stack in the center of the home screen, and you can flick left to right to scroll through them. I like the flexibility of breaking out activity cards, and the ability to stack related cards together, even if the sources are different apps. In addition, I like the unobtrusive notifications in the upper-right corner of the screen (tap the icon, and you can flick through your alerts right there); it also has one of the best approaches to accessing settings that I've seen.
Advantage: Android 3.0
Both iOS and Android 3.0 have good mail apps, but Android gets the nod, by a hair. Android's versatile, triple-pane approach to e-mail is easy to navigate. (If you don't use Gmail, though, you'll have to work with the generic e-mail app, which doesn't let you search your messages. At least you can easily organize them into folders.) More important, the behavior of Android's mail screens isn't dramatically different in the vertical versus the horizontal position.
Although Apple's Mail app looks good and is easy to navigate, it annoyingly behaves in a different way based on whether you're holding the tablet in landscape or portrait mode: In landscape, it shows you two panes, while in portrait it has a pop-up pane for moving through messages and inboxes. Compared with Android, iOS puts many more limitations on what you can download, and what you can do with a downloaded file. It will save JPEGs, PDFs, and Microsoft Office documents, but you can open those files only in specific apps that are written to hook into the Mail app (for example, Pages, iBooks, or Evernote). And you can't attach a file directly to a message; to send a photo, for instance, you initiate the message from the image in the Photo Roll, not from the e-mail app.
BlackBerry Tablet OS stumbles due to the fact that it lacks an integrated e-mail app. The BlackBerry Bridge feature lets you pair a BlackBerry phone with the tablet, so you can view your phone's BlackBerry Messenger e-mail, contacts, and chats on the PlayBook's larger screen. When you decouple the tablet and phone, the Messenger data disappears from the PlayBook--a feature that might frustrate consumers but should appeal to corporate IT honchos who want to limit the spread of sensitive information.
The PlayBook ships with icons for AOL Mail, Gmail, Hotmail, and Yahoo Mail (along with Facebook and Twitter), but these icons are misleading since they don't bring you to actual apps--they're merely shortcuts to those services in the Web browser. The browser interface for the mail services is a poor substitute for a mobile-optimized app. For example, I couldn't add an attachment in Gmail, though I could do so--with some graphics issues--in AOL Mail. I could save attachments from Web-based e-mail, but finding those documents again was difficult, and sometimes they didn't open properly.
WebOS's e-mail is similar to Android 3.0's take in that it has a multipane organization. Regrettably, individual e-mail messages can't be represented on their own activity cards unless you press, say, the reply or forward button; this action will make an e-mail message stand on its own, so you can stack it together with a Web page to create a hub of related content. You have the option of saving one or all attachments in an e-mail, or opening an attachment; however, I didn't see enough of the HP TouchPad's other apps to determine how attachments interact with them.