4G WiFi Maps & Speed Test. Find Signal & Data Now.

Needs a bit more functionality like which provider has the best indoor signal strength for an area

Someday this app will save your life

Very useful and informative App!!

Its got my dpms all wrong by about -15 dpms and wont show any towers in my area. Plus as I was driving down the road and drove by the tower that I know I connect to everytime showed i was connected to another tower that was farther away but my doms from the actual phone read -64 and the app said -78 least i found some good hotspots. Uninstalling and running galaxy s7.

My daughter just moved to Santa Cruz AREA of CA. Going 2 college. Best network down here BY FAR is VERIZON WIRELESS (her roommates have Sprint DOESN'T WORK AT ALL) & my MetroPCS (tMobile network) spoty AT BEST. I CANT make a call in her apartment and i have NO NETWORK unless i DRIVE to the Hwy 1. They share Netflix & Hulu using my daughters Unlimited VERIZON Hotspot (what they save on their cable bill) pays for my daughter's VERIZON Hotspot. I switched to Verizon cause I come here once a month (to bring the girls Supplies they're Poor College students LOL) THANK YOU VERIZON!!!!!

Doesn't work in my area. Seems to have me connected to a tower that I don't think exists and the compass points in a different direction, the signal strength is sometimes shown as 5 bars on the app and 0 bars and a 'no service's notification on the phone. It also shows poor wifi sometimes when I have a good connection but I only wanted the app to check the different mobile provider's signal in my poor signal area

While it seems like it is working for many, it is not for me. It shows me the direction of the tower I am supposedly​ connected to, North of where I am, while I have a clear line of sight true south to the true tower I receive my signal from. When I select the tower setting, it drops me in the middle of the Atlantic on the map before it can locate me properly. I know I have two towers in the surrounding 2 miles from where I am ( I see one of them!) Yet the app tells me:" no cell towers found".... From reading this app and website are the best in town, I don't even want to know what the others are capable of... Cheers!

Based on having used AT&T and now Verizon in a fringe area, this app gives an accurate representation of device-reported signal strength. I switched carriers based on open signal reports from my area and found out what everybody already knew: if you want rural coverage, go with Verizon.

It just guesses at which tower I'm connected to. If I zoom out a little on the map, a tower disappears, and my blue line switches to a different tower - which also updates the tower I'm connected to on the tower list screen. Zoom in, changes back. Zoom out, changes again. Zoom in, changes back. I understand that my T-Mobile S8 might not give up that info, but the app should tell me that, rather than presenting a guess as fact. Other than that, I'd give 5 stars.

An app with lots of good features but not accurate. Per t-mobile rep we have only three towers in this town but the map shows we have 55. Big discrepancy. Lots of ping pong hand off between towers and never any data. Calls break up too. Lots of problems with T-Mobile service.

On the cell towers map my local tower doesn't show up, and I am looking at it outside my window, about 5 miles away. Outside my area, the number of towers in local area should all show up on map; few do. App otherwise seems to be good. Down from 5 stars to 4. Update , the fix to show the towers didn't work, still will not show towers.

It does a good job of reporting connectivity (both WLAN and mobile data), easy to use and the UX is well thought out. However I found it was continually adding .csv log files after trying to work out where 4Gb of internal storage went. Disappointing lack of cleanup for the data it logs locally - even with the relevant SD card options checked / switched on. Despite a few updates since originally noticing this it's still filling up space, with no clean up

Latest update did not fix towers issue as my map shows zero cell towers in New York city and definitely doesn't show what tower I'm connected to. Even so, previously when it did show SOME towers they would pop on and off the map as you zoomed in and out. Never would show all towers.

Since I only use WiFi connections this app is a life saver. Not only can it find transmission towers but all WiFi connections (open & locked) for all available networks. Now I can get rid of all my individual network apps cause OpenSignal has it All! I highly recommend it!!!

No-signal areas show up as "untested" very misleading. Cant document black holes. App says it won't work properly unless you allow Google Play Services access to Body Sensors, Microphone. SMS Messages etc. BS

LG m154 Cricket, android 6.0.1, freezes. 'Reported', "need more error msgs to assist debug". Los Angeles area so towers are not the problem. Sure wish this would get fixed. Cannot tell if phone or Cricket problem. Sure wish I could help but with no error msgs I cannot.

Drove to the spot where Open Signal indicated my towers were, only to find there wasn't a tower any where in that area. The compass arrow seems to point 180° in the wrong direction from the tower I found that I am actually linked to. The signal strength seems accurate. Will uninstall. Not very useful.

The app doesn't show a mast I am standing in front of. Instead it confidently points to a tower that I know doesn't exist. When I travel around it sometimes shows me connected to a mast 3 miles away. It would be great if it worked, but it just doesn't.

Could be a good app if more people contributed in my area. I live in serious BFE and cell reception is horrible. I just wanted to to find the least horrible. I don't think it is too much to ask to have enough reception to accept a phone call or send a text. Especially in an emergency.

I live in Sacramento CA. They advertise T- Mobile is better than Verizon. The signal for T-Mobile is horrible. I couldn't wait to get back to Verizon. I found that others felt the same way I do. I don't know how Open Signal works. I'm sure their getting compensation for their claims that TMobile is better.

Great app. Found I have the wrong carrier for my area...really crappy service. Helps me find towers so I can text and make calls. Live on Canadian border and service throttled way back. Grrrr

Best app in this category. My only issue currently is that irregardless to how long i wait, the cell towers never appear on my map. Curiously, this wasn't an issue in the past, as towers showed up without any problems. No idea why I'm experiencing this issue now though. Once this issue is corrected, it will be back to 5 stars.

It shows 0.00% time with no signal despite the graph showing 100% time with no signal. Needless to say, I have no signal. Also it shows data is great when I don't have any signal! It used to be ok. I assume recent patches have done the damage

Extremely inaccurate cell tower locations. Towers are shown out of position by 10s of miles. Tells me to move to location of towers which are definitely not there. Useless for increasing signal strength.

Does exactly what it says on the tin. My isp doesn't like it though as since I've found my true speed I've been complaining constantly because they are not providing the minimum speed they promise.

I wish it would let you pick the default settings for the map. I only want to see 4G for T-Mobile. I don't use another carrier so the data for all carriers is worthless to me 99% of the time.

Well... need some fix... how can there are two "Setting" in the Menu Option (the three dots) ?! And how is possible there are towers in the middle of the sea or lake?! (Which i know from the gps position lat and long, there are nothing at that point). The app using google maps, which sometimes are not accurate in most unregistered/unmapping area). BUT AT LEAST ITS FREE from ADS. ????

Awesome app! Very helpful for seeing coverage. I initially thought it might use extra battery power, but it on average, uses less than 1% based on the battery usage in Android settings.

I can see the app's potential but the dashboard cell connection arrow never worked...it never would move at all. The cell tower location map showed a tower just down the road in the middle of a horse pasture...there is no cell source there unless the horses are hiding it. Having users report cell sources is not always going to be accurate. Plus it said that non-existent tower was my source which makes me think the app automatically says the source is whatever tower it has in its memory which is closest to you whether there is a source there or not.

Results of this app are absurd.. DL/UL of 10+Mbps according to this app and still cannot play an online game with lag!!

Must disable wifi to test cellular data speed. Should test wifi and data separately. Never finds cell towers to show on map. No distance in map to connected tower (if shown). Claims 5-bar cell signal but phone shows -104 dBm (am in near-dead zone at home). Button to zoom to my location shows 50 mile radius instead of around me. Keeps running (1 process, 4 services) when *I'm* NOT using it! Uninstalled.

Useful app but it would be better if it showed the lte band you were on and highlight the connected tower in the map. I use Signal Spy to see band useage. Also it disagrees with LTE Discovery on which tower the phone is connected to.

Not showing but 1 cell tower although it says 8 found and that 1 cell tower does not exist - does show a bunch of wifi's Says I'm connected to a tower to the South were none exists - my Verizon tower is 4 mi North. It says I have a 5 bar signal when it is a weak 1 bar. Show "very good" 4g coverage 4 mi South where I can barely ever get a Verizon signal. Not workin like it used to. No good. UNINSTALLED

Must be T-Mobile in hiding. It seems that I could never see where any towers were, and oddly the number of towers would change significantly by the minute. From 49, to 71 the next time I opened the app, to 91 to 100. I was stationary the entire time. Not only that, but the compass would change directions by as much as 45 degrees depending on which direction I faced. Yes, I understand that as I turned it should also, but it seemed to move too much, thus I doubt it's accuracy. Besides, no matter where it pointed, no towers seemed to be that way. In fact 1 was almost 180 degrees off. Now T-Mobile uses this data to claim it's number one. Except when you eliminate 2G and 3G data, I see many many more gaps than AT&T and Verizon. Somehow I question the validity of those claims, except spin doctors can make any data look impressive when needed. Nobody wants 3G or less, so if they included that (which still seems lacking) then people will be mad. I saw no need for this app, I already knew I get 4G 100% of the time on Verizon and since the so called features on finding towers didn't work anyway. Uninstalled.

Seems to have stopped working. It says I'm connected to a tower somewhere out to sea and there are no other towers on the map. Time to uninstall.

Has the potential to be a good App, however critical parts do not work. I like the Signal Compass feature showing signal direction and signal strength in dBm (an actual power level) in lieu of signal bars, which has no standard. Unfortunately, the App will not show any cell tower locations. Also, the signal strength reading is only updated every 5 minutes, or when restarting the App. Signal level readings need to update no less than once a second to be useful. I am using a phone from service provider Freedom Pop, running Android 4.4, which uses the Sprint and Verizon CDMA networks.

The app you need for finding signal and helping to report where bad signal is. It is the best go to app I've ever had to help me find and diagnose signal problems on mobile networks.

The app is great but you coverage data for Puerto Rico is highly inaccurate and needs to be started over completely. 95% of the cellular network was destroyed in the hurricane. The coverage map is very misleading.

Very useful app, though there are some bugs. New version seems less buggy so far and I love the dark theme. If there's a hard limit on the number of nearby cell towers and WiFis that can be displayed, it would probably be better to show it as >100 instead of 100.

Wish I could give it a five but the compass seems to be stuck in one place and the map doesn't show cell towers...oh well I'll uninstall and try again later on.