very disappointing

I have several speedometer apps on my 4S and this is one of the worst. Very erratic, speed can jump as much as 10 or 12 mph when your on speed control at 62 mph. Other apps and my Tom Tom or Navigon will be maybe 1-2 mph off. Also, tracking will work for a short time and then your position will more or less freeze. Have erased and re-installed and have done a hard re-set with no change. Really needs some work. Two dollars is not a lot, bit this app is not good even if it was free.

lonnie47 about Speedometer s54 (Speed Limit Alert System)