Google Docs app for Android. That's why it's been slowly rolling out the updates, incrementally adding features and turning what began life (more or less) as a glorified web browser into a useful app. The latest upgrades deliver possibly the most requested feature -- offline access. Now there's an option to pin individual files for local storage and the app will automatically sync the latest version anytime you're on WiFi. If that's not often enough, you can manually update whenever you have a data connection. There's also a new layout for viewing docs on tablets that allows you to swipe left and right to flip between pages and a scrubber at the bottom for quickly jumping from one part of the doc to another. Hit up the Android Market now to score the update for yourself.
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Google Docs for Android offline access