I use two, one is The FEMA Alerts app.... It is free and GPS based.... The second one I use is; "Weather Alerts" (it has a symbol that is a yellow triangle, with a black exclamation point in the center)... It was like $3.99 or $4.99, not much.... The reason I like it, is because you can place up to 20 pinpoint markers, anywhere you want, and in the setting you can set it so that you'll be notified of weather from within 5 miles to up to 50 miles of that pinpoint, depending on how you set your settings up.... Additionally, you can go into the settings and adjust them, for each individual pinpoint, for exactly what NWS Watch, Warnings, Advisory, (they offer EVERY single message NWS sends, NOT just Warnings, but also like; Area Forecast Discussions and Zone Forecast too) or whatever you want that the NWS issues for each of your pinpoint areas!!!!
It's a VERY useful tool for me personally, being the sole person in charge of; severe, Winter, Tropical, etc. weather for the group of radio stations that I work for and the fact that I am on call 24 hours a day, 7 days a week, 365 days a year......
On my person smart phone, with this app, I have pinpoints set up of coarse for all 10 of our primary covered counties, along with pinpoints set up for counties both West, North, East, and South of us to give me plenty of heads up notice, of anything moving our way, long before it gets into our primary coverage area....
Others, not in the broadcasting/forecasting/warning business, like I am, appreciate this app's use and individual control of it's pinpoint areas, to set specific pinpoints for maybe like; home, work, a family member's home, counties that join them, for heads up notice of anything that is moving their way too...
There are a number of good apps out there, the SAF-T-Net app, mentioned above by Mike S is another good one also, that I've personally heard of.... If FREE apps are what you're looking for, as Mike S. suggested, the SAF-T-Net app has a GREAT reputation and the FEMA Alerts app, I mentioned, I've personally tested it's timing and reliability, and it alarms exactly when the SAME code is fired off, through both The NOAA Weather Radio System and The EAS....
An additional thing that I would suggest though, if you stick with just FREE weather alert apps or a paid app, is that you have more than one on your phone!!! Even the best of the best apps can fail!
Also, of coarse every home should have a NOAA Weather Radio and finally, when you're on the road, you need to know which radio stations offer FULL SERVICE severe weather coverage, INCLUDING for their RURAL COUNTIES too and NOT JUST for their PRIMARY COUNTIES!!!!!
I won't use this as a platform to promote the stations that I personally work for (though we are FULL SERVICE severe weather coverage stations), however I will say; there are VERY few FULL SERVICE severe weather coverage stations, again in particular that COVER the RURAL COUNTIES that they broadcast too EQUALLY as well as they do their primary population centers!!!
Anyway, I hope my suggestions on apps, along with a little additional information too, helps you as well as others, out when it comes to where you can turn for severe weather; Watch, Warning, Advisory, etc. information.....
