OONI Probe (f-droid version) 4.0.0 APK Download by The Tor Project

With this app, you will examine the blocking of websites and instant
messaging apps, measure your network's speed and performance, and check
whether systems that could be responsible for censorship and surveillance
are in your network.

OONI Probe is developed by the Open Observatory of Network Interference
(OONI), a free software project (under The Tor Project) that aims to uncover
internet censorship around the world.

Since 2012, OONI's global community has collected millions of network
measurements from more than 200 countries, shedding light on multiple cases
of network interference.

Collect evidence of internet censorship
You can check whether and how websites and instant messaging apps are
blocked. The network measurement data you will collect may serve as evidence
of internet censorship.

Detect systems responsible for censorship and surveillance
OONI Probe tests are also designed to uncover the presence of systems
(middleboxes) that could be responsible for censorship and surveillance.

Measure the speed and performance of your network
You can measure the speed and performance of your network by running OONI's
implementation of the Network Diagnostic Test (NDT). You can also measure
video streaming performance with the Dynamic Adaptive Streaming over HTTP
(DASH) test.

Open data
OONI publishes network measurement data because open data allows third
parties to verify OONI findings, conduct independent studies, and answer
other research questions. Openly publishing OONI data also helps increase
transparency of internet censorship around the world. You can explore and
download OONI data here: ooni.io/data/

Free software
All OONI Probe tests (including our NDT and DASH implementations), are based
on free and open source software. You can find OONI software projects
on Github. Curious to learn how OONI Probe tests
work? Learn more here.

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Disclaimer: Running OONI Probe might be against the terms of service of your ISP
or legally questionable in your country. By running OONI Probe, you will connect
to web services which might be banned. The OONI project will publish data
submitted by probes, possibly including your IP address or other identifying
information. In addition, your use of OONI Probe will be clear to anyone who has
access to your computer, and to anyone who can monitor your Internet connection
(such as your employer, ISP or government). Learn more about potential risks
here