One continued beef I have with Android is that it runs a separate app for Gmail accounts -- an unnecessary division of labor. Windows Phone normally provides a separate tile on its Start screen for each email account, but you can use the linking feature to get a unified inbox both in the mail client and on the Start screen. If you look carefully at the tiny To text, you can see which account the message was sent to. Android is more elegant in presenting messages from multiple accounts: It shows distinct color bars next to each message to indicate the associated account.
Neither OS handles mail folders well. When viewing your mail list in Windows Phone, you have to press the More button (the ... icon) to get the Folders menu, which you then use to see messages in a specific folder. In Android, you have to hit the Menu button to see a list of folders as well. In both cases, it's a hassle. Android 2.3 does not support message threading, but Windows Phone 7.5 does. You have to set it up in the Settings app's Applications section, under Messaging, not in the mail client.
Composing messages is straightforward in both Windows Phone and Android, though neither mail client supports rich text formatting as iOS 5 does. Both also look up names as you enter them from your address book and previous email history.
Android's mail client lets you view attachments in Microsoft Office and PDF formats, as well as the common Web graphics formats. Windows Phone 7 isn't so savvy. It can open Office documents in its mobile versions of Word, PowerPoint, and Excel, though PowerPoint is strangely restricted to version 2007 and later (.pptx) files. To open PDFs, you'll need a separate PDF viewer, such as the free Adobe Reader.
Both mail clients show a list of attachments in the message body, but Windows Phone doesn't automatically download them. Instead, you must tap an attachment to download it and tap it again to open it. This saves on 3G data usage. Both Windows Phone and Android open zip files (unlike iOS, which requires a third-party app to do so).
In both Windows Phone and Android, you can easily search for mail, as well as reply to, forward, delete, and select multiple messages, though you can't select or deselect all messages. Android forces you to conduct your search from the OS's universal search facility; you can't search directly in the email client, as you can in Windows Phone. Selecting multiple messages in Windows Phone 7.5 is easy -- once you realize you need to tap the left side of the screen to open the selection bubbles.
Calendars. Both Windows Phone 7.5 and Android 2.3 let you view and update your calendars, as well as sync to Exchange and Google calendars. Both "Mango" and "Gingerbread" let you send invites to other users. On Android, the Calendar app automatically adds Exchange and Google Calendar invitations to your calendar with Maybe status, which is not apparent until you open the appointment. You can open Exchange invitations in the Email app, as well as accept or decline the invitation. But you can't open .ics invitations sent to POP or IMAP accounts. Windows Phone relies on its Calendar app to handle all invitations; its mail client doesn't know what to do with them.
Windows Phone 7's day and agenda views are pretty, but the tiny colored text for your appointments is very hard to read on the black background. And the month view is all but useless; the supertiny text for each appointment in each date is easily overlooked. Android uses clearer presentation in all of its calendar displays; its fonts aren't as elegant, but you can actually read your calendar.
Contacts. Both Windows Phone and Android have capable contacts apps, but it's a bit easier to navigate contacts in Android. The Contacts app displays a gray box as you begin scanning your contacts list, and if you drag it, you can scroll through the letters of the alphabet that appear in the box and move to names beginning with that letter. Windows Phone's People app has a different quick-nav capability: Tap the # icon button near the top to get a list of letters that you then tap to jump to. It's not slick, but it works.
In Android, you can also designate users as favorites, to put them in a shorter Favorites list. Windows Phone doesn't do that exactly; instead, it lets you "pin" an individual to the Start screen for easy access, such as to click an email address or phone number to initiate a message or call.
Windows Phone 7.5 lets you create groups of contacts, as well as link contact cards to create virtual groups. For example, if you have separate entries for a couple, you can link their cards so that each person's contact information appears in both of their cards. Android "Gingerbread" doesn't support groups at all.
Social networking. Windows Phone's People app provides a convenient location to monitor your social feeds -- Twitter, Facebook, LinkedIn, and others -- and engage in any conversations. You use the Me tile to initiate a message to all your networks simultaneously. The app is not as full-featured as the social networking services' own apps, so you still need to use them to do more sophisticated actions, including sending a direct message. A bizarre implementation issue on Windows Phone is that if you install the separate Twitter, Facebook, or LinkedIn apps, you have to sign in separately -- the sign-in you provided for the People app to use isn't shared with the social networking apps themselves.
Android doesn't integrate your social streams. Instead, you use the various apps for your social services separately.
The winner: A tie. Windows Phone is handier at social communication and has a better contacts app. Both have pros and cons for email, but Android enjoys a slight edge -- and it doesn't require reading glasses to use if you're over 40. Ditto on calendars.
Windows Phone 7.5 vs. Android 2.3: Applications
If running applications is your thing, get an iPhone. Nothing else comes close in terms of rich application options that in some cases can do much of what a computer can do. But many people don't see the need for such apps on a smartphone and its small, constrained interface. For them, lightweight widgets are sufficient, and if that describes you, Windows Phone 7.5 and Android 2.3 are respectable platforms.
Apps. Android has a larger app selection than Windows Phone 7.5, especially "middleweight" productivity apps such as Quickoffice and Documents to Go. By contrast, Windows Phone's "big" app is Office, a collection of rudimentary touchup tools using the Word, PowerPoint, and Excel labels. Word is barely more capable than a typical note-taking app, and PowerPoint can only let you edit text, not adjust graphics -- much less create slides. Excel can't edit cells' contents, so it's good only for viewing and searching spreadsheets. Windows Phone 7.5 comes with a SharePoint client, but it's hard to imagine, given its lack of security, that any significant business would let users into such corporate assets through a Windows Phone.
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