Users have occasionally come across a keyboard that lags while typing an email or using iMessage. iOS 8 allows for use of third-party keyboards, but this issue persists even then.
Potential Solutions –
- Guided Access, an accessibility mode, sometimes interferes with some keyboards. Go into Settings – General – Accessibility – Guided Access, and make sure that the button is off.
- Go to Settings – iCloud – Documents and Data, and turn it off. If the issue goes away, you should be able to turn this back on again without the problem coming back.
- You can also try resetting all settings by going to Settings – General – Reset all Settings.
- Adding or removing third-party keyboards is now possible by going to Settings – General – Keyboards. Swiping a keyboard name to the left will reveal a delete button. Tap on “Add New Keyboard…” for other available options.