What is "mobile application"?

Mobile application could be any application used in mobile phones which is used by user for any purpose.For example, it could be SMS services, ring tones, games etc. Theses are general mobile application we find in all mobile phones.

What is "redesigning mobile application"?
Redesigning mobile application is designing an existing mobile application in such a way that it becomes more user friendly, more fun and should cover the problems that are in existing application. It could also be a new application which could contain all the parameters described earlier.