Last week, Google released Gmail 2.0 for Android and iOS devices, and the latest versions add a number of new, valuable features. But they still aren\u2019t a substitute for the browser-based Gmail, and the apps' feature sets vary widely based on OS.\n\tLet\u2019s start with the new Android version, which like all Gmail apps, is free. If you have a device with Android Ice Cream Sandwich (4.0) or later, Gmail offers a convenient new "swipe" feature, that lets you swipe a finger across an e-mail in your inbox to either archive or delete the message, based on your settings. It\u2019s a small feature, but it saves a tap or two.\n\tAnother new feature I appreciate, for Android 4.0\u00a0or higher: Messages can automatically resize themselves to fit your device\u2019s screen size. And you can zoom in for easier reading\u2014something you could do in previous versions of Gmail for iOS but not in the Android version. The new Android Gmail app also lets you view larger previews of photo attachments. Unfortunately, these updates aren\u2019t available to Android users with phones running older, pre-Ice-Cream-Sandwich versions of Android, which is Google\u2019s subtle way of prompting laggards to upgrade to newer devices and\/or software. (Upgrading your Android phone to a new OS isn\u2019t always a cakewalk, however.)\u00a0\n\tOn the iOS side, the new Gmail app is mostly playing catch up with Android (no surprise there). Gmail for iOS now supports multiple Google accounts (up to five). When you start typing a search in Gmail, the app now autosuggests keyword phrases. You can scroll endlessly through your inbox instead of having to click to manually load more messages. And you can respond to Google Calendar invites directly from within messages.\n\tThe Gmail interface on iOS is also improved. The previous version had a dark, unhappy gloom to it, but Gmail 2.0 has more white space and is more pleasing to the eye.\n\tNeither of these apps supplant the need for browser-based Gmail, which lets you do so much more, such as make and receive phone calls via a browser plug-in. But the latest Gmail updates are welcome revisions to what were already solid apps.