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 Sprint, T-Mobile, AT&T and Verizon.

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 an Apple 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

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.

Do Not Sell My Info: https://www.opensignal.com/ccpa

What’s New

Version 5.7.1

This release fixes an upload test bug, and improves the user experience on iOS 14

Ratings and Reviews

4.0 out of 5
2.5K Ratings

2.5K Ratings

SilverXrider ,


I have been using this app to find towers while boondocking in the desert, it helps me point my Yagi antenna at the nearest tower. Well the latest update removed that function so this app is now just about useless as i normally only have one tower in range, I just need to know where it is, this app used to do that, no more so will have to find another way. Why you removed the best feature is beyond me.

*UPDATE* I have updated my review two 4 stars as the developers have brought back the compass, which was to me the most important feature, redesigned, might want to add a direction marker at the top of the screen as it is not readily apparent which direction is the alignment point.

Developer Response ,

Thank you for your feedback. We had to take out the signal compass for a little while to fix a number of bugs but I'm glad to report that we have now added it back; all fixed, re-designed and ready for you to use. We hope you'll like the latest version of the app and find it more useful!

New Wave Industry ,

Great app but needs some tuning.

Been using this app for over a year now and it seems to really gives you the best average speed test rather than maximum speed. I have Ookla SpeedTest and I use it to compare the differences of its performance and Ookla (and other speed test app) does only give you what your cell signal/Wi-Fi maximum speed is and Open Signal gives you the real speed that you’re always averaging. This app would be perfect if the developer can make it for you to delete your old test records (you can but it comes back after resetting the app) and needs to add location to where you test your signal and Wi-Fi so you can keep track of where you had already test the signal. There seems to be a problem with the find cellular signal. I’m standing right next to my cellular sever (T-Mobile) and it’s pointing away from it?. Other then that this is a great speed test app. 3 stars for now.

<nickname-shnickname> ,

New version removed the most useful function!

[Updated, 8 June 2020]: Changed my rating to 3 stars now that the signal compass feature has been restored (as of app version 5.2.2). Would give it another star except that the upload part of the speed test feature consistently fails for me (starts, but fails with message “Error”). Of 24 speed tests, only 3 completed that part of the test.

Just updated the app (to version 5.0.3) only to discover that the most useful function has been removed: the cell tower signal direction indicator!!!

That feature has been used by many people over the years, like me, to determine in which direction to point the antenna of my cell signal booster in order to obtain the best connection.

It totally makes no sense at all why the developers would choose to remove that function, and also to not announce it in the version release notes.

Two thumbs down! This app is now mostly useless. The speedtest function hasn’t worked reliably or at all most of the time for over a year. And the cell signal mapping is mostly useless because of low participation outside of large metropolitan areas, and if you’re in such an area you’re likely to get a good signal anyway.

Developer Response ,

Thank you for your feedback. We had to take out the signal compass for a little while to fix a number of bugs but I'm glad to report that we have now added it back; all fixed, re-designed and ready for you to use. We hope you'll like the latest version of the app and find it more useful!


OpenSignal Inc.
35.9 MB

Requires iOS 10.0 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

    With Family Sharing set up, up to six family members can use this app.

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