Two requirements (there are many many more than just two) for keeping kosher are:
Sawfish, also know as Carpenter Shark, are a family of rays. These fish are not kosher as they do not meet the two requirements of kosher fish: movable fins and easily removed scales.
Keeping kosher.
It is called keeping kosher; obeying the Torah. The Torah forbids Jews to eat pork (Deuteronomy ch.14). See also:The Jewish laws of keeping kosher
Keeping kosher.
There are a number of kosher apps, not just one. The usual function of these is to locate nearby kosher places to eat, so the answer is yes.
Yes, that is one of the major parts of keeping kosher. See also:Laws of keeping kosher
There are none.
Yes, magi magi is kosher as long as it is produced following kosher guidelines and does not contain non-kosher ingredients. It is always advisable to check for kosher certification on the packaging to ensure it meets kosher requirements.
Judaism. See also:http://judaism.answers.com/jewish-laws/laws-of-keeping-kosher
Meat and dairy.See also: more about how Jews keep kosher
No, but halal-keeping people can eat kosher food, except for anything containing alcohol.
It doesn't. Kosher food is "cleaner" and the food itself is equally delicious.