iPhone Screenshots


Opensignal is a fully-featured mobile connectivity and network signal speed test tool.

Speed test, including download, upload and latency - for 3G & 4G/LTE and WiFi
Find the best network provider in your area. Compare coverage on EE, O2, T-Mobile, Vodafone and Three.

Video streaming test - check streaming experience for Netflix, YouTube and others
Compare what you’re paying for to what you’re actually getting by measuring connection quality on a Google map with a database of signal and speed test results
Completely free and no adverts. Our mission is to create an open-source map of connectivity so that everyone in the world can enjoy the best mobile connection available


- Test tab with speed test and video streaming quality to analyze mobile video performance with results for time spent buffering, loading and playback
- Signal dashboard and ping test - for testing latency response
- Connectivity map to show locations of 3G & 4G/LTE tests
- Network stats with average speeds for download, upload and latency and network strength on major providers
- Availability stats and historical log of your WiFi and 3G & 4G/LTE speed tests to check connectivity over time
- Signal alert when you have no data or call connectivity

Opensignal Speed Tests

Opensignal speed tests measure your real experience of mobile connectivity and signal. The speed test runs a 10-sec download test, 10-sec upload test and ping test to determine the speed you will likely experience. The speed test runs on common internet CDN servers. The result is calculated with the middle range of samples.

Check if you're getting the network quality you're paying for from your mobile network or internet provider. Use our coverage maps to compare networks and data speed in your area. Opensignal works with WiFi mobile broadband internet.

Video Speed Tests

Slow video load time? Video buffering? More time waiting than watching? A good average network speed isn’t enough for a great video experience. Opensignal’s video test gives you the full picture of your network experience. Opensignal video tests show you exactly what to expect with HD and SD videos.

Watch a 15-sec video snippet to test and log load time, buffering, and playback issues in real-time.
Monitor how video quality changes with time and location. Review video test results in History to see if your network experience has changed over time.

Availability Stats

Opensignal calculates the time you’ve spent on 3G & 4G/LTE or had no signal. This shows your network availability in the places you use your phone the most.

See where you are getting 3G & 4G/LTE and check you’re getting the service you’re paying for from your network provider. If not, use the data to prove connectivity and signal issues to your mobile operator.

Coverage Map

Opensignal’s coverage maps show signal strength down to street level using speed test and signal data from local users. With network stats on local network operators, you can check speeds ahead of a trip, find out if you will get a signal in remote areas, check your signal against others in the area to see if you’re getting the best service, arrange the best local SIM and check the signal strength when travelling.

Improving Network Connectivity

We provide an independent source of truth in mobile network experience: A data source that shows how users experience mobile network speeds, gaming, video and voice services worldwide. To do this, we collect data on the signal strength, network, location and other device sensors. You can stop this at any time in the settings. We share this data with network operators globally and others in the industry to drive better connectivity for all.

What’s New

Version 5.5.1

This release includes a redesigned speed test dial & scale as well as a number of bug fixes and performance improvements.

Ratings and Reviews

4.2 out of 5
340 Ratings

340 Ratings

Jontly ,

Great app in decline

This was a fantastic app, the most useful of the connection checkers for mobile signals. But the revised front page and removing the ability to locate nearest cell towers etc is a real downgrade. The previous incarnation would have had a 5 star review, please reinstate the features.

dixione123 ,

Good but needs improvement

Great concept and potentially very useful when choosing what mobile network to go with. However, the filter by operator is sporadic, showing only some operators in the list - it seems related to zoom level even though all are available in the currently shown area. Secondly, why is there a limit to the zoom level. All data disappears once you go further in. I’m not expecting it to be detailed or trusted to the sq meter but it needs to allow you to go deeper that it currently does. I never saw the previous version with cell tower details but I support that being brought back if it’s possible.

The good names are all gone ,

No direction arrow

The recent update removes the tower direction arrow. Why? And why no explanation! Although from reading other reviews it now appears that this wasn’t a live direction anyway, but instead database information and potentially bogus.
It’s just a speed test app.
If it were crowd sourced data that might be useful but the data only shows at some map scalings? So I’m now asking what does this app actually do other than harvest my data?


OpenSignal Inc.
34.4 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.


English, Dutch, Filipino, French, German, Indonesian, Italian, Japanese, Malay, Portuguese, Simplified Chinese, Spanish, Thai

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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