Since you are here: this app https://ooni.torproject.org/post/ooni-mobile-app/ is pretty good! and is a good test to know how the country you live in is dealing with censorship (it detects 'middleboxes' in your network, too).

Note that the app data is used as evidence of any censorship events that you come across, so data is collected and published (this is the main aim of this app)