I thought this was a app where you could look up the limit, which is probably my fault for not reading thoroughly. But the speed is inaccurate which makes the tolerance too high or too low. I found myself going 5 over the limit I gave and it didnt alarm because it said I was still under the limit.
Also, clicking a limit automatically takes you to your phone app and calls some long invalid number.
Nijerya about Speed Limit App