How to Buy a PDA
Introduction
Ready to get your life in order? Then maybe it's time to get a personal digital assistant. These small, lightweight devices can keep track of your appointments, phone numbers, and to-do lists, usually syncing with Microsoft Outlook or other desktop organizer software. Today's PDAs can also keep you amused with games, music, and video; a growing number have built-in cameras, and a few newer ones integrate GPS receivers as well. Even entry-level PDAs now have color screens, and all but the most inexpensive models also let you track e-mail, browse the Web, and send instant or text messages via built-in wireless Internet connectivity--Bluetooth (for connecting via a Bluetooth cell phone), Wi-Fi, and/or (in the case of PDA-phone hybrids) cellular networks. At the high end, a couple of models support two or three modes of wireless connection, so you can enjoy broadband speeds at Wi-Fi hotspots and increasingly speedy cellular hookups almost anyplace else.
PDAs range from simple, unconnected devices designed primarily to replace pocket address books and calendars to powerful devices with lots of memory, wireless connectivity, integrated cameras and keyboards, and graphics muscle for playing music and video. Here, we'll discuss the main issues you need to think about, such as PDA operating systems and how much memory you need. more
We'll address the CPUs used in handhelds, screen resolution, and internal versus external memory--and tell you how important each feature is to your purchase. more
How much memory does your PDA need? What about the different operating systems? Find the answers to these questions and more in
The Big Picture
Formerly just handy pocket secretaries, PDAs have become ever more versatile. Modern PDAs can handle wireless e-mail and instant messaging, digital photography, music, and even video. Increasingly, businesspeople who spend a lot of time on the road are replacing standard cell phones with PDA-phone hybrids such as a Palm Treo, a RIM BlackBerry, or a Windows Mobile-based model. (If you're interested in such a device, be sure to read "How to Buy a Cell Phone" as well.)
While PDAs of one type or another have been around for about a decade, technological advances have made them more versatile at the high end and more affordable at the low end. And these days, all PDAs, regardless of price, are thin, lightweight, and generally small enough to fit easily into a pocket.
The processors that power PDAs are faster than they used to be, so PDAs can now handle digital music and photos with ease. High-end models now sport mobile graphics processors that enable gaming and video playback without a huge sacrifice in battery life. At the other end of the price spectrum, even lower-cost units come with color screens. And a growing number of mid- and high-range units sport integrated mini-keyboards (also known as thumb keyboards), a welcome development for users who want to use their PDAs for e-mail or messaging and feel slowed down by styluses and handwriting-recognition software.
The ability to communicate wirelessly enhances a PDA's overall utility. Many of the midrange units incorporate 802.11b or the faster 802.11g Wi-Fi for accessing home or work networks or commercial hotspots. Even more PDAs are equipped with Bluetooth, which can connect to desktop or laptop PCs, to peripherals (such as headsets or printers), or to the Internet through a suitably equipped cell phone. One of the latest trends in PDAs is the inclusion of integrated GPS receivers and software that allows the handheld to double as a navigation device, either in a car or when you're walking around an unfamiliar city.
Key Features
Though these platforms used to be distinct, the differences have diminished--to the point where Palm now makes its Treo PDA/phones for both Palm OS and Windows Mobile platforms. PDAs based on early versions of the Palm OS were simpler, lower-cost devices, and these days the most inexpensive Palms are still cheaper than the lowest-end Windows Mobile PDAs. But Palm's high-end models today match the Windows Mobile offerings in such features as cameras and Internet connectivity. And while all PDAs based on Windows Mobile used to be relatively expensive across the board, today you can find models that compete directly with midrange Palms.
Both are also taking on increasingly capable models based on the BlackBerry OS, which continues to set the gold standard for mobile e-mail management, and Symbian, the OS used by Nokia. The main drawback here is relative scarcity of third-party applications for these OSs; if you're content with the apps you get with these devices, this may not be a problem.
Microsoft's Windows Mobile OS (the latest version is Windows Mobile 5, usually with a device-specific patch) basically looks like a considerably shrunken version of the desktop Windows OS. It can run numerous applications simultaneously--though only one app can appear on screen at a time. Unlike the Palm OS, which shuts down one application (or runs it in the background as appropriate) when you open another, Windows Mobile requires you to manually close an application or it will run in the background and use up memory you might want for other purposes. (The latest Windows Mobile devices have a memory manager that lets you see what applications are running and how much memory they are using.) Windows Mobile generally requires more memory than the Palm OS, so most Windows Mobile 5 PDAs come with at least 64MB of ROM and an equal amount of RAM.
The Windows Mobile OS is more complex to use than the Palm OS. But with most keyboard-equipped Windows Mobile devices, you also get pared-down versions of Microsoft Office apps such as Outlook, Word, Excel, and PowerPoint--letting you create and edit documents as you would on your desktop. When you synchronize your Windows Mobile PDA with your PC, documents on each are updated accordingly. The integrated Windows Media Player 10 in Windows Mobile 5 handles MP3, WMA, and other multimedia files; it also allows you to run content from subscription sites (such as Rhapsody) that use Microsoft's Digital Rights Management technology. A growing number of vendors are offering Windows Mobile devices. Hewlett-Packard has historically offered the greatest variety, but more competitors are emerging--particularly in the PDA/phone arena.
Intel's XScale ARM processors have been upping the ante in this arena. The latest processors--the PXA27x family, previously code-named Bulverde--can run at up to 624 MHz and are available either with or without integrated memory. Texas Instruments and Samsung also compete in the PDA processor market, with TI focusing primarily on connected devices. Following its acquisition of Intel's handheld processor unit, Marvell (previously best known as a Wi-Fi chip maker), is expected to compete vigorously as well.
Applications on Windows Mobile devices require more memory, especially to play audio or video. The specs for today's Windows Mobile PDAs usually specify two types of internal memory: RAM and flash-based ROM. The ROM is where the PDA stores the OS and vital data such as contact information. If your batteries run down and your device loses power, the data in ROM is unaffected. RAM, on the other hand, requires power--if you lose power, you lose data in RAM. Most software runs in RAM, so the more you multitask on a Windows Mobile PDA, the more RAM you'll want. Look for a unit with at least 64MB each of ROM and RAM.
Almost all Windows Mobile devices come with external card slots. CompactFlash used to be the dominant expansion format, but SD Card has become more common. Some models accept both CompactFlash and SD Card formats. These slots can also connect to add-ons such as cameras, audio players, phones, or GPS receivers.
Not all color screens are created equal: The screens on cheaper models generally aren't as crisp and sharp as those on more expensive units. That's why it's a good idea to check out the model you're considering in person before you buy.
Unlike most Palm and Windows Mobile devices, Blackberry PDAs use thumb keyboards and jog-wheel navigation.
Whatever your choice, try to kick the tires before you buy. Check to see how well you can read the screen with the backlight off--or outside on a sunny day. If the unit has a keyboard, try it out for size. Make sure the buttons are reasonably comfortable and solid. Fiddle with the navigation--how easy is it to do what you want to do?
If you're looking for a cell phone and a PDA, you should consider a PDA/phone so that you don't end up lugging around two separate devices. If you tend to be on the road a lot and need to check your e-mail regularly, you might also consider models that offer Internet access--through a built-in cell-phone modem, a Bluetooth connection to a cell phone, or built-in 802.11b or 802.11g Wi-Fi.
The Specs Explained
You don't have to spend a fortune to obtain a useful PDA, especially if you're mostly interested in keeping track of your schedule, having your address book handy, and perhaps playing a few simple games. Lots of inexpensive personal organizers can handle those tasks. You'll pay more if you want a nicer screen, more on-board memory, or more advanced functions such as wireless connectivity. Those traits are most useful if you plan to use your PDA for entertainment--playing sophisticated games, displaying video clips or snapshots, or playing MP3s--as well as managing e-mail and messaging for work, and browsing the Web.
Important Consideration: External Memory Slot
External memory cards allow you to store music, photos, videos, or applications; some also let you add peripherals such as Wi-Fi adapters. Having more than one slot can be better; some higher-end devices offer two slots so you can use one for storage and the other for a peripheral. Only the most inexpensive devices have no storage card slot. Nowadays SD Cards are the most popular media, though many older devices still use CompactFlash cards.
Important Consideration: Operating System
The operating system is the software that performs a PDA's basic functions. Palm software is less complex, but Windows Mobile has portable versions of Microsoft Office applications and Windows Media Player. Devices based on RIM's BlackBerry operating system have become increasingly popular.
Palm has tended to dominate the entry-level market with its inexpensive (and unconnected) Zires. But an increasing number of Windows Mobile devices are debuting at midrange prices ($150 to $200). While Treos introduced early in 2006 commanded a premium, newer models are going to be slightly less expensive, the company says. Sophisticated, phone-like BlackBerry models such as the Pearl are also pricey.
Important Consideration: Connectivity
Don't expect e-mail or Web access on a very inexpensive entry-level device. Mid- and upper-range models might include Bluetooth, Wi-Fi, or an integrated phone connection. A PDA that connects to the Internet can be very useful for checking e-mail, messaging friends or clients, or surfing the Web.
Somewhat Important: Screen and Resolution
Expect color on all but the oldest or very cheapest handhelds. You will, however, see a difference in screen resolutions: Cheap Palms have 160 by 160 screens, while midrange and expensive models boast 320 by 320 screens. Some high-end Windows Mobile devices have quarter-VGA (320 by 480) screens. BlackBerry devices have high-resolution screens of unconventional resolutions.
In general, you'll want better quality if you plan on viewing or capturing video and still photos, playing games, or simply making heavy use of your device.
Somewhat Important: Internal Storage
Expect 32MB or even less on entry-level models, and 64MB each of RAM and ROM at the high end. Flash ROM, which stores important data (contact info, for example) that you won't lose if the battery runs dry, is increasingly common in pricier models. If you plan to play MP3 files, download video clips or software, or work on large spreadsheets, you'll want either a lot of internal memory or an external memory slot (see above).
PDA Shopping Tips
Shopping tips for buying a basic organizer:
Shopping tips for buying a PDA with advanced features:
PCWorld Staff
