Once you get used to the honeycomb pattern, there is no turning back from Typewise: https://play.google.com/store/apps/details?id=ch.icoaching.wrio https://play

Once you get used to the honeycomb pattern, there is no turning back from Typewise: https://play.google.com/store/apps/details?id=ch.icoaching.wrio https://play.google.com/store/apps/details?id=ch.icoaching.w... It has a free version, too, but the beta users were upgraded to the paid version earlier. Not opensource but doesn't even have access to the net.