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Last updated on: 2026-06-19
Android Apps > Tools > OONI Probe
OONI Probe icon

OONI Probe

6.0.2
The Tor Project
4.49
3,039 reviews
500,000+
Downloads
Free

Measure Internet Censorship, Speed & Performance

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iOS version

About OONI Probe

OONI Probe is a tools app developed by The Tor Project.

How many times has OONI Probe been downloaded?

OONI Probe has been downloaded 580 thousand times. In the last 30 days, the app was downloaded 2.8 thousand times.

What is the rating of OONI Probe?

OONI Probe is rated 4.49 out of 5 stars, based on 3 thousand ratings.

Is OONI Probe free?

OONI Probe is free to download. The APK download size is 60.85 MB. The latest version available is 6.0.2. The last update was on May 19, 2026.

What are the requirements for OONI Probe?

OONI Probe requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play February 2017.

Description
Are websites and social media apps blocked? Is your network unusually slow? Run OONI Probe to find out!

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: https://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: https://github.com/ooni. Curious to learn how OONI Probe tests work? Learn more: https://ooni.io/nettest/

To receive updates from the OONI-verse, follow us on Twitter: https://twitter.com/OpenObservatory
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More data about OONI Probe

Price Free to download
Total downloads 580 thousand
Recent downloads 2.8 thousand
Rating 4.49 based on 3 thousand ratings
Ranking Not ranked
Version 6.0.2
APK size 60.8 MB
Number of libraries 48
Designed for Android 5.0+
Suitable for Everyone
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OONI Probe compared with similar apps

Common keywords of similar apps

Ooni Censorship Probe Open Software Https Websites Systems Responsible Surveillance Free Tests Blocked Instant Messaging Interference Project Uncover World Collect Evidence Measurement Ndt Streaming Dash Learn Network Data Measure Internet Performance Speed Apps Find Check Test

Keywords missing from this app

Wifi Connection Wi Fi Signal App Analyzer Strength Tools Connected Mobile Browser Ip Devices Information Router Networks Proxy Speedtest Helps Access Features Unblock Web Address Device Browsing Info Li Security Real Time Fast Vpn Online Recent Upload Detailed Testing Analysis

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Google Play Rating history and histogram

2.2K
450
240
0
150

Downloads over time

OONI Probe has been downloaded 580 thousand times. Over the past 30 days, it averaged 92 downloads per day.

Changelog of OONI Probe

Show changelog

Developer information for The Tor Project

The Tor Project

contact@openobservatory.org

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Comments on OONI Probe for Android

★★★★★ David Crahmaliuc · Aug 2, 2024
OONI Probe is a fantastic tool! It's a free and open-source software that allows you to test the blocking of websites and detect censorship in your network. OONI Probe is designed to help you identify whether certain websites or online services are being blocked or throttled by your internet service provider (ISP) or government. By running OONI Probe, you can get a better understanding of your internet freedom and identify any potential censorship or restrictions in your area.
★★☆☆☆ Pradipa P. Rasidi · Jul 29, 2024
Since the last update (May 2024), no longer works in Android 7. Always crashes when running tests, any kind of tests.
★★☆☆☆ Bluezebra2 · Jul 24, 2023
For an app run by the Onion network, im surprised and disappointed that the app had trackers. And I am especially disappointed that one of the tracker is Facebook (meta). I mean all the stats from the probe are (unless opted out) automatically sent to you. So what's up with trackers?!
★☆☆☆☆ JusticeMatters · Apr 10, 2024
First you have to go to their website to see your phone's scan results and then nothing is broken down to give you any information, unless you understand a graph of lines that tell you nothing
★☆☆☆☆ SAKIB · Nov 30, 2022
Unfortunately it does not test torrent, file sharing websites, IPTV etc. which are mostly the targets of blocking Corp-govt elites. It only probes for basic websites, not the ones that are really targeted.
★☆☆☆☆ Heavychronicsmoker (Bombsquad0420) · Sep 8, 2025
I don't know where these developers think that it's okay to take over my phone for an hour and thirty minutes The amount of time it takes for these scans to run when it only took fifteen minutes before is insane and unacceptable I didn't sign up for a virus scanner If anybody uses this app, I recommend you disable it until you go to sleep it's a battery waster and data waster; They have a piss, poor development team; if this is the kind of service, they deliver.

Google Play Rankings for OONI Probe

This app is not ranked

Technologies used by OONI Probe

OONI Probe is requesting 9 permissions and is using 48 libraries.
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