Starting with iOS 8, Apple allowed developers to create keyboards (i.e. input methods) that could be accessed in the same way as the pre-installed keyboards on iOS devices. Keyboards are distributed as apps through the App Store.
Once you download the app, launch it. It may well provide its own instructions, but here is the general procedure (click images to enlarge).
- Launch Settings
- Go to General > Keyboard
- Tap “Keyboards” (to will probably have a number next to it showing the number of keyboards that you currently have enabled).
- Scroll down and tap “Add New Keyboard”
- Scroll down to the section for third-party keyboards and tap the one you want.That’s all. The new keyboard that you have just enabled should now appear in the list of Keyboardsand should now be accessible via the globe icon when ever the touchscreen keyboard in visible. This is what you should see when you use the globe icon to change keyboards.