4 stars: Have only had very limited opportunity to try this. Used it for about 50' on a Shinkansen bullet train in Japan and it seemed responsive to train's speed changes, and as best as I could calculate by watch and map, the average was about right.
3 stars: It's still new... Trying it out... I know it doesnt keep your max speed unless the app is open on the screen, it will keep the distance traveled but not the speed...
5 stars: Good app for measuring speed of any vehicle by using GPS without internet...
5 stars: Works great, motorcycle is geared different..so my speedometer is off..I use it to primary keep track of my speed. But the other features are great.
3 stars: Hangs frequently even when other apps are not opened. Altimeter is not reliable. Connection to satellites breaks abruptly. Only current speed displayed is reliable.
5 stars: Quick to set up and excellent interface. Worked very well for me.
5 stars: I drive a lifted 4x4. The speedometer is not accurate. Using this app keeps things real and helps me to avoid speeding tickets.
3 stars: Works pretty well .. but doesnt understand hills to well but overall i like it....pretry accurate.
3 stars: Gps says connecting all the time and does not connect
5 stars: It is fabulous. Shows accurate speed.
4 stars: Good coverage, works well most of the time
4 stars: Nice application, on runway its seems new experience
5 stars: One of the best apps at the real time speed shows.