Gmail is still one of the best ways to check email on the go.

Gmail's app gives you access to the popular Web-based email service. The app is packed with the latest features like Gmail's priority inbox and customizable tabs.

With a Gmail account, you get plenty of storage for free, meaning you likely never have to delete an email again. (You can always purchase extra storage just in case). You also get Google's excellent search feature, so you can easily go back and find old messages.

Price: Free

Available on: Android and iOS. Gmail can also be accessed from any smartphone browser like BlackBerry and Windows Phone by heading to m.google.com/mail.