Apps must ask before they can see where you are, and you can answer once, while using, or never. Most apps that ask do not need it.
The drawing that proves the sentence above. It is the same card that is in the book.
Think of it as
a map that asks permission before pointing at you.
For example
A game asks to know where you are. You choose "only while using", and it works exactly as well.
This is one card out of 275.
The hundred words you meet most are free — the whole set, animated, in one file that works with no internet.
Volume 1 has all 275 in fifteen chapters, with Staying Safe the largest chapter on purpose.