A tennis coach costs 50$ per hour.
We have made for you a tennis coach for relatively little money for a long time.
Tennis Accelerometer is your tennis coach.
Take your iPhone or iPod as a racket and make a stroke.
Program will compare the results with the basic strokes of a tennis coach.
You can learn:
Take your iPhone or iPod as a racket, wait in start position for 5 seconds, make a stroke, and you will see : "Good", "Very good" or "Once more, please".
The program draws the results and you can compare them, too.
For right- and left-handed.
Have a good time !