There are nearly two million apps in the Apple App Store. Yet only a small fraction of them are worth downloading.

Below are some of the most unique and useful iPhone apps you didn’t even know you needed. All of these apps have great user reviews, are updated regularly, and many are award winners. And perhaps best of all, they’re all free.

Edison Mail is a smart email app with a built-in assistant feature designed to help you manage messages faster and more effectively while on the go. You can create custom swipes for the features you use most, set smart notifications, quickly undo sends, and unsubscribe with a single tap.

You can use it with any IMAP email account and with most major email providers, including Gmail, Hotmail, iCloud, Yahoo, Outlook, Exchange, and AOL.