Calculate your serve speed

[tennisplayer_85]

Originally Posted by Tight Lines

I just checked out the new version's screen shots at the app store. Apparently, he is using the serve speed formula at http://www.donthireddy.us/tennis/speed.html which I told him about. The numbers all check out. This means the serve speed estimate should be very accurate.

The OP has finally turned the app into a useful tool by calculating the initial serve speed. I will be buying the app soon.

If you are just curious about your serve speed and are not interested in doing so on a regular basis, you can just record the serve and plug in the numbers into the website link above. That will do roughly the same thing with less accuracy.

Harry

Thanks Harry! Yes I am using almost the same math as shown on that website.
It’s a great explanation if you wanna know more about how it’s calculated!

And yes you can calculate it all yourself but for 3 dollars really? It’s quite a lot of work to do it yourself. And if you’re like me you don’t wanna know it just once

Though I think the average speed of version 1.0 was very useful too for measuring improvements, ServeSpeed 1.2 of course is a lot cooler since with the initial speed you can compare yourself to the pro’s!

[JPW]

Very cool! I've done these calculations the hard way for a while now. Now I just need an iPhone to try this out .

[v-verb]

Originally Posted by JPW

Very cool! I've done these calculations the hard way for a while now. Now I just need an iPhone to try this out .

a newer iPod will work too i think

[Tight Lines]

I bought the app today and tried it out. It works great! Love the 60 fps on my iphone 4s.

I also love how you can toggle back and forth between two adjacent frames and select any point between the two frames using a slide bar, not just a midpoint between the frames.

Great job!

Harry

[v-verb]

Originally Posted by Tight Lines

I bought the app today and tried it out. It works great! Love the 60 fps on my iphone 4s.

I also love how you can toggle back and forth between two adjacent frames and select any point between the two frames using a slide bar, not just a midpoint between the frames.

Great job!

Harry

So how fast did you serve?

[Tight Lines]

Originally Posted by v-verb

So how fast did you serve?

Well, I tested the app on my 13 year old son who has been playing for about 2 years. His first serve was around 95 and second serve (kick serve) was around 60-65.

Next time, I will have my son film me so I can check my own speed. My feeling is it will probably be about the same as my son's.

Harry

[tennisplayer_85]

Originally Posted by Tight Lines

I bought the app today and tried it out. It works great! Love the 60 fps on my iphone 4s.

I also love how you can toggle back and forth between two adjacent frames and select any point between the two frames using a slide bar, not just a midpoint between the frames.

Great job!

Harry

Harry, great to hear you like it so much! You would do me a huge favor if you could post this review in the App Store. If you get a chance of course

[v-verb]

Originally Posted by Tight Lines

Well, I tested the app on my 13 year old son who has been playing for about 2 years. His first serve was around 95 and second serve (kick serve) was around 60-65.

Next time, I will have my son film me so I can check my own speed. My feeling is it will probably be about the same as my son's.

Harry

That's EXTREMELY respectable! Very nice - I'm not sure I can match that.

Thanks for the feedback - will buy the app this weekend

Cheers!

[tennisplayer_85]

Originally Posted by tennisplayer_85

Harry, great to hear you like it so much! You would do me a huge favor if you could post this review in the App Store. If you get a chance of course

Thanks Harry! really appreciate such a positive review! I am sure lots of people will find it very useful

https://itunes.apple.com/app/servespeed/id581908085

[iradical18]

Any plans on an Android version?? Please say yes!

[tennisplayer_85]

Originally Posted by iradical18

Any plans on an Android version?? Please say yes!

Great you are asking! i have looked into it already, though there are some struggles with android like the support for 60fps camera and so on. My first plans are to make the iPhone App even better with sound detection and some other great updates. So after that hopefully i can look into android.

[iradical18]

Originally Posted by tennisplayer_85

Great you are asking! i have looked into it already, though there are some struggles with android like the support for 60fps camera and so on. My first plans are to make the iPhone App even better with sound detection and some other great updates. So after that hopefully i can look into android.

I'll be looking forward to it, thanks for answering my question! In the mean time, I'm giving my buddy 3 bucks to buy it and we'll be testing it out this weekend.

[Avles]

I was skeptical about the app but it sounds like you've done some good things with it--calculating the initial speed instead of the average speed is a big improvement.

I have a stupidphone and get by with http://www.donthireddy.us/tennis/speed.html, but if I ever get a smartphone I might give this a try.

[Tight Lines]

Originally Posted by tennisplayer_85

Great you are asking! i have looked into it already, though there are some struggles with android like the support for 60fps camera and so on. My first plans are to make the iPhone App even better with sound detection and some other great updates. So after that hopefully i can look into android.

In my opinion, I think you should do the Android version first as I don't think adding sound would be a substantial improvement. Even with sound detection, you would still have to review the video to select the frame showing the ball landing. Moreover, sound travels relatively slowly which means you need to ask how far the phone is from the server. In other words, you are not saving any steps in doing the calculation.

Even with only a 30 fps camera, the calculation would be reasonably accurate since you can select a point in between two frames.

JMHO.

Harry

[JPW]

I've been pretty excited to get an iPhone 5, first, because I just had bad luck with AT&T, and second, to get this app I've done these calculations with a digital camera many times. This app certainly makes it much MUCH easier.

One question I do have for the developer is, would recording someone serving on TV be a good way to test the accuracy of this app? It seems like the timing would be the same and you could easily determine the other needed data. This just seems like a good way to check against an actual speed gun at a tennis tourney.

[Nostradamus]

Awsome. Mine is like 98 MPH. is this correct ? I did it with Android phone, I hope it is just as accurate.

[LeeD]

98 mph flat first serve.
In 60 degree temps, Dunlop heavy balls, IN serves, should hit the backboard about just under 3' high, 21' behind the baseline on center serves.
Out wide, it can still go 100 if it barely hits the backwall after the initial IN bounce, because a wide serve travels up to 8' farther in distance.

[Nostradamus]

Originally Posted by LeeD

98 mph flat first serve.
In 60 degree temps, Dunlop heavy balls, IN serves, should hit the backboard about just under 3' high, 21' behind the baseline on center serves.
Out wide, it can still go 100 if it barely hits the backwall after the initial IN bounce, because a wide serve travels up to 8' farther in distance.

??????? 100mph serve wide will hit the fence ?

[LeeD]

You saw the vid of me serving when I was 62, couldn't run one step, first tennis day of the year, at night, in 60 degree heat.
The IN serves out wide, duece court, all hit about 24-36" high at the backfence. The camera was placed on a 48" tripod. Those weren't the best serves, just the first six I tried. Only TWO went IN.
If I served up the center, the bounce would be quite a bit higher, as you can see the ball dropping by the time it hit the backfencing on those wide serves.
I claim 100mph, which is about the fastest on rec courts at a 4.0 level of tennis.

[spinorama]

Too many variables to calculate like that (wind, placement in relation to the distance measured perpendicular to the net, spin on the ball, weather, etc etc)....just get it clocked.