Theres no reason to give out a phone number before meeting. Use the app to pick a time and place to meet. The most successful dating apps will have thousands of reviews. Dont be in a rush to friend someone on Facebook, which gives them access to a lot more personal information about you, your family, and your work.

Is it dangerous to give a guy your number?

Giving a man your number is ok but it might be smart to take his if youre really interested. Keep in mind there is also the luxury of social media, you dont need to break that boundary if you dont want it.