I posted this in your other thread.Don't know why you didn't read my message there.
For tip calculator you'll probably have to download it (guessing here,i don't have the phone).You can download the free app called Tip Calculator by Steve Coward/PhillyAndroid It is one of the best out there.
do you really need a tip calculater? I thought they were a joke. Listen, if your in a cheap place for lunch, take the total, move the decimal point over one spot. thats 10 percent. if your at a nice place for dinner double that for 20%. if your somewhere in between give something in between.