One of my favorite apps
TornadoSpy is very helpful for me, it is easy to use and I am always the first to know of sightings. The alerts are extremely useful and work well for both NOAA and user sightings. This app is worth much more than $1.99.
I recommend this to anyone who lives in a Tornado Hot Zone or who has an interest in tracking tornadoes. This app has great user support as well. The developers of this app added a feature within one day of me requesting it.
Mobius1_10 about
TornadoSpy