What app gives you free Wi-Fi?

I'm curious, what application do you know of that provides users with free Wi-Fi access? Is there a specific service or platform that is widely recognized for offering this benefit to its users? I'm particularly interested in understanding the mechanics behind such an app, how it secures connections, and whether there are any potential risks or limitations associated with using it. Additionally, are there any restrictions or requirements that users need to meet in order to access the free Wi-Fi offered by this app?