What about Apple's iOS7 typing jam?

1. Deleting unused applications, large files and other fragments, and reducing data storage in devices can significantly improve performance. If you find that the storage space is too full, you can uninstall those apps that take up a lot of space but feel unnecessary.

2. You can enter the settings page and select Close to prohibit some applications from automatically starting the background process.

3, reduce the dynamic effect, that is, open the settings, general and auxiliary functions to open the button to reduce the dynamic effect.

4. Turn off the blur or transparency effect, select the settings, general and auxiliary functions, and then turn on the contrast enhancement button.

5. Fix the keyboard lag, that is, open the settings, enter iCloud, close documents and data, and open them manually. If you don't need to store documents and data in iCloud, it will be better to turn it off completely. Go back to the main interface of settings, click Enter General to open the restore option, and select Restore all settings.