Awesome
Android, iOS, Desktop, CLI 
<div align="left">
<a href='https://play.google.com/store/apps/details?id=org.openobservatory.ooniprobe'>
<img alt='Get it on Google Play' src='images/play-store-badge.png' height="50px"/>
</a>
<a href="https://itunes.apple.com/us/app/ooni-probe/id1199566366?mt=8">
<img src="images/app-store-badge.png" height="50px" />
</a>
</div>
OONI Probe is free and open source software designed to measure internet censorship and other forms of network interference.
Every month, thousands of networks are measured by OONI Probe users in more than 200 countries. Since 2012, millions of network measurements have been published from around the world.
OONI Probe is available for the following platforms:
- Android: probe-android (Play Store, F-Droid)
- iOS: probe-ios (App Store)
- Desktop App: probe-desktop
- Command Line tool: probe-cli
OONI Probe tests are implemented in Go in github.com/ooni/probe-cli.
OONI Probe tests the lists of websites included in the citizenlab/test-lists repository.
OONI Probe used to be written in python. The legacy python version of OONI Probe is available here: probe-legacy.
To learn more about OONI, check out our website: https://ooni.org/