The K750i is a very nice phone!

You'd need a Palm OS or PocketPC to use Diet & Exercise Assistant. It really isn't hard to enter into at all. Since most everything is in the database, and if it's not, it's only a matter of a few fields to fill in.

Here are some screen shots.

Daily Log Page
Food Journal Page
Selecting a Food
Searching for a Food in the DB
Weight Chart
Historic Weight Chart
Histogram Analysis
Diet Plan Selection
Set Weight Goals

I use a Palm Treo 650 to enter all this into, it's pretty easy. It works for me.