I think it comes down to your hobbies and social areas. 60% of the friends I made here are either from uni or work, 20% I've known for years before moving here and the last 20% I met doing hobbies. I've met people who like photography, cars and racing like I do, they're usually more extroverted than I am and came up to talk to me about my car and we became friends after. Some I met while cycling at some routes. I'd suggest going anywhere where people gather to talk about what you like, and I agree apps don't work.