SwiftKey Keyboard

SwiftKey Keyboard is a free keyboard app that helps you type faster on your mobile device by predicting what you're going to type next. The appearance of the SwiftKey keyboard can be customized through the SwiftKey Hub. The key layout follows typical QWERTY style, but you can opt for a full, compact, or thumb-optimized key distribution. You can also select from dozens of themes to change the color scheme to suit your preferences.

If you're not fond of traditional typing, you can use the SwiftKey Flow feature. With it, you type by making swipe gestures across the keyboard instead of tapping.