While typing fast with touch screen device, is easily type on the character near by, and M15 is use to help you correct those typo, and let you fast typing with your android devices.
Note: due to Google playstore request to remove more than one keyboard on same developer ID, we just merge M15 into M8, please download M8 input, if you like to use M15 input.
Details please refer to J&M Soft Web Site