We may not rely on our phones for actual calls as often we used to, but these fancy little rectangles of ours still handle more than their share of critical communication.

From emailing clients to texting with colleagues, our smartphones keep us connected to business wherever we may roam. But the apps that come installed on devices by default aren't always the best options; in fact, they can often be flat-out disadvantageous when it comes to professional productivity.

I've spent a fair amount of time testing the significant email and texting apps available on Android. These are the titles I'd recommend, broken down by category and purpose — and all free, unless otherwise noted.

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